Pressure relief device

Abstract

A pressure relief device comprises a pipe body, a vertical plate, a transverse plate, a column body, a fixing ring, a rotating ring, a box, a cover, a retaining ring, a second spring, a piston plate, a first limiting protrusion, a second limiting protrusion, a shifting block, a first spring, a supporting plate and a sealing plate, the pipe body comprises a vertical section and a horizontal section, an arc face is arranged on the portion, between the vertical section and the horizontal section, of the pipe body, a vertical cavity is formed in the vertical section, and a second cavity is formed in the horizontal section. A horizontal cavity is formed in the horizontal section, and a middle cavity is formed between the vertical cavity and the horizontal cavity; a first through hole is formed in the vertical plate, and a second through hole is formed in the transverse plate.

Description

Technical Field

[0001] The invention relates to the field of high-mobility cooking support vehicles, and in particular to a pressure relief device. Background Art

[0002] The reheating box is one of the core equipment of the high-mobility cooking support vehicle. The reheating box usually has two usage modes: vehicle-mounted mode and backpack-mounted mode. From the perspective of use, it can be divided into: staple food processing, non-staple food reheating, and from the perspective of use, it can be divided into general-purpose high-altitude type, etc. In order to ensure that the reheating box can be used on the backpack, the design principles of the reheating box are good environmental adaptability and good air tightness.

[0003] In actual engineering practice, there are the following problems:

[0004] 1. The existing reheating box is equipped with steam inlet and outlet, pressure relief device, pressure gauge, etc. When the internal steam pressure is too high, the pressure is released through the pressure relief device.

[0005] However, since highly mobile cooking support vehicles often work in harsh outdoor environments and work outdoors for a long time, some components will be subject to more erosion, resulting in a shortened lifespan. For example, the pressure relief valve is generally opened and closed by a spring, which is easily damaged by wind and rain erosion, resulting in the pressure relief valve unexpectedly opening when the pressure in the reheating box does not meet the standard. The working environment and tasks of highly mobile cooking support vehicles determine that maintenance is difficult.

[0006] The use of a two-stage pressure relief, double spring and double insurance method may be able to solve the problem, but the effect is limited because both stages of the springs are exposed to harsh environments. If the performance of one degrades, the probability of the other degrading is also high. It is not a foolproof solution.

[0007] 2. The pressure relief pipe in the reheating box in the prior art often includes a horizontal section and a vertical section. The pressure relief structure is usually arranged in the vertical section. However, impurities are easily accumulated in the horizontal section (for example, some food has fallen or entered the box in a harsh environment), which is difficult to clean after long-term accumulation.

[0008] 3. The pressure relief device of the prior art lacks the function of regulating the opening and closing of the pressure relief hole. It may be possible to achieve closure by some means, but the means are complicated.

[0009] Fourth, the pressure relief device of the prior art lacks a means of rapid maintenance and replacement.

[0010] 5. It is difficult for the existing pressure relief device to form two switchable pressure relief paths within a limited space. Summary of the invention

[0011] In order to overcome the above problems, the present invention proposes a solution to solve the above multiple problems at the same time.

[0012] The technical solution adopted by the present invention to solve the technical problem is: a pressure relief device, including a tube body, a vertical plate, a horizontal plate, a column, a fixed ring, a rotating ring, a box, a cover, a retaining ring, a second spring, a piston plate, a first limiting protrusion, a second limiting protrusion, a shift block, a first spring, a support plate, and a closing plate. The tube body includes a vertical section and a horizontal section. An arc surface is provided on the tube body between the vertical section and the horizontal section. A vertical cavity is provided in the vertical section, a horizontal cavity is provided in the horizontal section, and an intermediate cavity is provided between the vertical cavity and the horizontal cavity; a first through hole is provided on the vertical plate, and a second through hole is provided on the horizontal plate;

[0013] The inner end of the horizontal cavity is provided with the vertical plate, the vertical plate is connected to one end of the first spring, the other end of the first spring is connected to the closing plate, the lower end of the closing plate is connected to the supporting plate, the outer end of the horizontal cavity is provided with an inlet of the tube body, and the closing plate can block or detach from the inlet by sliding;

[0014] The lower end of the vertical cavity is provided with the horizontal plate, the column is supported above the horizontal plate, a cavity is provided in the column, a groove is provided at the upper end of the column, the fixing ring is fixed on the cavity wall of the vertical cavity, the rotating ring is provided above the fixing ring, the fixing ring is provided with a first hole, the rotating ring is provided with a second hole, the shifting block is provided above the rotating ring, and the shifting block includes a plane;

[0015] The box is provided with a piston plate, a second spring, a first limiting protrusion, and a second limiting protrusion. An opening is provided on the peripheral wall of the box. The first limiting protrusion and the second limiting protrusion are located at the upper and lower ends of the opening. The piston plate can move up and down between the first limiting protrusion and the second limiting protrusion. One end of the second spring is connected to the piston plate.

[0016] The outer wall of the box is provided with a first threaded portion and a second threaded portion along the vertical direction, and the inner wall of the fixing ring is provided with a threaded segment. In the first state, the first threaded portion is engaged with the threaded segment, the box opening faces upward, and the cover is arranged on the opening of the box; the opening is blocked by the inner wall of the fixing ring; the upper end of the column is against the box; in the second state, the cover is removed, the second threaded portion is engaged with the threaded segment, the other end of the second spring is placed in the groove, there is a gap between the column and the peripheral wall of the box, and the opening is located above the rotating ring.

[0017] Preferably, a retaining ring is provided below the cover.

[0018] Preferably, in the first state, the retaining ring retains the other end of the second spring.

[0019] Furthermore, the first threaded portion and the second threaded portion are located at the upper and lower ends of the opening.

[0020] Further, the second threaded portion is disposed close to the opening of the box.

[0021] Preferably, a plug is provided at the upper end of the tube body.

[0022] Preferably, the plug is provided with air holes.

[0023] Preferably, the vertical section includes an upper section and a lower section.

[0024] Preferably, the inner wall of the upper section is threadedly connected to the outer wall of the lower section.

[0025] Furthermore, when the piston plate is located above the opening, the interior of the box is connected to the outside.

[0026] The beneficial effects of the present invention are:

[0027] Invention point 1, in response to the first point raised in the background technology, a common spring and a spare spring are also used, but the spare spring is protected by a box to prevent erosion. Although there is an opening on the box, the opening is closed by a fixing ring under normal circumstances, so the protection effect is relatively good; when the performance of the common spring decreases, the pressure relief valve will open when the value of the pressure gauge on the reheating box is insufficient. At this time, the spare spring can be used to control the opening pressure of the pressure relief valve through the spare spring.

[0028] Invention point 2: In response to the second point raised in the background technology, a common spring is set in the horizontal section of the pressure relief pipe, and a normal passage is set in the vertical section. Therefore, most of the debris can be easily blocked outside the pressure relief pipe and retained in the reheating box. Although there are debris in the reheating box, the space is large and easy to clean.

[0029] Invention point three, in response to the third point raised in the background technology, a fixed ring and a rotating ring are used in coordination, both the fixed ring and the rotating ring are provided with through holes, and the circulation and closing modes are switched by rotating the rotating ring, and a shift block is provided on the upper surface of the rotating ring, one side of the shift block is arc-shaped and the other side is flat to facilitate shifting, thereby realizing the switching function by simple means.

[0030] Invention point four, in response to the fourth point raised in the background technology, a threaded section is provided on the lower section of the inner surface of the fixing ring, and a threaded portion is provided on each of the upper and lower ends of the box, and the two threaded portions can be threadedly connected with the threaded section, so that the box opening can be connected to the fixing ring whether it is facing upward or downward. When the box opening is facing upward, a cover is provided on the opening, and a spring is sealed inside. When the box opening is facing downward, the spring extends into a groove that has been prepared at the bottom to achieve fixation.

[0031] Invention point five: In response to the fifth point raised in the background technology, a piston plate and upper and lower limit protrusions are provided in the box, the first passage of the vertical section is provided by the fixed ring and the rotating ring, and the second passage is provided by the gap between the fixed column and the fixed ring and the opening on the peripheral wall of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 It is a three-dimensional diagram of the reheating box of the present invention.

[0034] Figure 2 It is a cross-sectional view of the flow path of the pressure relief device when the present invention is working normally.

[0035] Figure 3 This is a cross-sectional view of the non-pressure relief state when the backup pressure relief structure of the present invention is opened.

[0036] Figure 4 This is a cross-sectional view of the pressure relief state when the backup pressure relief structure of the present invention is opened.

[0037] Figure 5 It is a schematic diagram of a swivel of the present invention.

[0038] In the figure, the reference numerals are as follows:

[0039] 1. Pressure relief device; 2. Manual pressure relief valve; 3. Steam outlet; 4. Pressure gauge; 5. Steam inlet; 6. Control panel; 7. Communication interface; 8. Vertical section; 9. Horizontal section; 10. Arc surface; 11. Horizontal cavity; 12. Intermediate cavity; 13. Vertical cavity; 14. Inlet; 15. Vertical plate; 16. First through hole; 17. Horizontal plate; 18. Second through hole; 19. Column; 20. Groove; 21. Fixed ring; 22. First hole; 23. Rotating ring; 24. Second hole; 25. Box; 26. Cover; 27. Retaining ring; 28. Second spring; 29. ​​Piston plate; 30. First limit protrusion; 31. Second limit protrusion; 32. Shift block; 33. Gap; 34. First spring; 35. Support plate; 36. Closing plate. DETAILED DESCRIPTION

[0040] As shown in the figure: a pressure relief device includes a tube body, a vertical plate, a horizontal plate, a column, a fixed ring, a rotating ring, a box, a cover, a retaining ring, a second spring, a piston plate, a first limiting protrusion, a second limiting protrusion, a shift block, a first spring, a support plate, and a closing plate. The tube body includes a vertical section and a horizontal section. An arc surface is provided on the tube body between the vertical section and the horizontal section. A vertical cavity is provided in the vertical section, a horizontal cavity is provided in the horizontal section, and an intermediate cavity is provided between the vertical cavity and the horizontal cavity; a first through hole is provided on the vertical plate, and a second through hole is provided on the horizontal plate;

[0041] The inner end of the horizontal cavity is provided with the vertical plate, the vertical plate is connected to one end of the first spring, the other end of the first spring is connected to the closing plate, the lower end of the closing plate is connected to the supporting plate, the outer end of the horizontal cavity is provided with an inlet of the tube body, and the closing plate can block or detach from the inlet by sliding;

[0042] The lower end of the vertical cavity is provided with the horizontal plate, the column is supported above the horizontal plate, a cavity is provided in the column, a groove is provided at the upper end of the column, the fixing ring is fixed on the cavity wall of the vertical cavity, the rotating ring is provided above the fixing ring, the fixing ring is provided with a first hole, the rotating ring is provided with a second hole, the shifting block is provided above the rotating ring, and the shifting block includes a plane;

[0043] The box is provided with a piston plate, a second spring, a first limiting protrusion, and a second limiting protrusion. An opening is provided on the peripheral wall of the box. The first limiting protrusion and the second limiting protrusion are located at the upper and lower ends of the opening. The piston plate can move up and down between the first limiting protrusion and the second limiting protrusion. One end of the second spring is connected to the piston plate.

[0044] The outer wall of the box is provided with a first threaded portion and a second threaded portion along the vertical direction, and the inner wall of the fixing ring is provided with a threaded segment. In the first state, the first threaded portion is engaged with the threaded segment, the box opening faces upward, and the cover is arranged on the opening of the box; the opening is blocked by the inner wall of the fixing ring; the upper end of the column is against the box; in the second state, the cover is removed, the second threaded portion is engaged with the threaded segment, the other end of the second spring is placed in the groove, there is a gap between the column and the peripheral wall of the box, and the opening is located above the rotating ring.

[0045] As shown in the figure: a retaining ring is arranged below the cover. In the first state, the retaining ring holds the other end of the second spring. The first threaded portion and the second threaded portion are located at the upper and lower ends of the opening. The second threaded portion is arranged close to the opening of the box. A plug is arranged at the upper end of the tube body. An air hole is arranged on the plug. The vertical section includes an upper section and a lower section. The inner wall of the upper section is threadedly connected to the outer wall of the lower section. When the piston plate is located above the opening, the interior of the box is connected to the outside.

[0046] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A pressure relief device, characterized in that: It includes the tube body, the vertical plate, the horizontal plate, the column, the fixing ring, the rotating ring, the box, the cover, the retaining ring, the second spring, the piston plate, the first limiting protrusion, the second limiting protrusion, the shift block, the first spring, the supporting plate, and the closing plate. The tube body includes a vertical section and a horizontal section. An arc surface is provided on the tube body between the vertical section and the horizontal section. A vertical cavity is provided in the vertical section, a horizontal cavity is provided in the horizontal section, and an intermediate cavity is provided between the vertical cavity and the horizontal cavity. A first through hole is provided on the vertical plate, and a second through hole is provided on the horizontal plate. The inner end of the horizontal cavity is provided with the vertical plate, the vertical plate is connected to one end of the first spring, the other end of the first spring is connected to the closing plate, the lower end of the closing plate is connected to the supporting plate, the outer end of the horizontal cavity is provided with an inlet of the tube body, and the closing plate can block or detach from the inlet by sliding; The lower end of the vertical cavity is provided with the horizontal plate, the column is supported above the horizontal plate, a cavity is provided in the column, a groove is provided at the upper end of the column, the fixing ring is fixed on the cavity wall of the vertical cavity, the rotating ring is provided above the fixing ring, the fixing ring is provided with a first hole, the rotating ring is provided with a second hole, the shifting block is provided above the rotating ring, and the shifting block includes a plane; The box is provided with a piston plate, a second spring, a first limiting protrusion, and a second limiting protrusion. An opening is provided on the peripheral wall of the box. The first limiting protrusion and the second limiting protrusion are located at the upper and lower ends of the opening. The piston plate can move up and down between the first limiting protrusion and the second limiting protrusion. One end of the second spring is connected to the piston plate. The outer wall of the box is provided with a first threaded portion and a second threaded portion along the vertical direction, and the inner wall of the fixing ring is provided with a threaded segment. In the first state, the first threaded portion is engaged with the threaded segment, the box opening faces upward, and the cover is arranged on the opening of the box; the opening is blocked by the inner wall of the fixing ring; the upper end of the column is against the box; in the second state, the cover is removed, the second threaded portion is engaged with the threaded segment, the other end of the second spring is placed in the groove, there is a gap between the column and the peripheral wall of the box, and the opening is located above the rotating ring.

2. A pressure relief device according to claim 1, characterized in that: A retaining ring is arranged below the cover.

3. A pressure relief device according to claim 2, characterized in that: The retaining ring retains the other end of the second spring in the first state.

4. A pressure relief device according to claim 1, characterized in that: The first threaded portion and the second threaded portion are located at upper and lower ends of the opening.

5. A pressure relief device according to claim 4, characterized in that: The second threaded portion is disposed proximate to the opening of the box.

6. A pressure relief device according to claim 1, characterized in that: The upper end of the tube body is provided with a plug.

7. A pressure relief device according to claim 6, characterized in that: The plug is provided with air holes.

8. A pressure relief device according to claim 1, characterized in that: The vertical section includes an upper section and a lower section.

9. A pressure relief device according to claim 8, characterized in that: The inner wall of the upper section is threadedly connected to the outer wall of the lower section.

10. A pressure relief device according to claim 1, characterized in that: When the piston plate is located above the opening, the interior of the box is connected to the outside.

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