A pressure relief device

Abstract

A kind of pressure relief device, including tube body, vertical plate, horizontal plate, cylinder, fixed ring, swivel ring, box, cover, retaining ring, second spring, piston plate, first limit protrusion, second limit protrusion, dial block, first spring, support plate, closure plate, the tube body includes vertical section, horizontal section, arc is arranged on the tube body between vertical section and horizontal section, vertical cavity is arranged in the vertical section, horizontal cavity is arranged in the horizontal section, and intermediate cavity is arranged between vertical cavity and horizontal cavity;First through-hole is arranged on the vertical plate, and second through-hole is arranged on the horizontal plate.

Description

Technical Field

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

[0002] The reheating box is a core piece of equipment for highly mobile cooking support vehicles. It typically operates in two modes: onboard and on the back. Based on application, it can be categorized into two types: for processing staple foods and for reheating side dishes. Based on geographic location, it can be divided into general-purpose, high-altitude, and flat-bed models. To ensure its suitability for backpack use, the reheating box's design principles prioritize environmental adaptability and excellent airtightness.

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

[0004] 1. The existing reheating box is equipped with a steam inlet and outlet, a pressure relief device, a 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 are kept outdoors for long periods of time, some components will be subject to more erosion, resulting in a reduction in their 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 opening unexpectedly 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 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 performance 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 set 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 scheme adopted by the present application to solve its technical problems is: a pressure relief device, comprising a pipe body, a vertical plate, a horizontal plate, a column, 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 dial block, a first spring, a support plate, and a closing plate, wherein the pipe body comprises a vertical section and a horizontal section, an arc surface is arranged on the pipe body between the vertical section and the horizontal section, a vertical cavity is arranged in the vertical section, a horizontal cavity is arranged in the horizontal section, and an intermediate cavity is arranged between the vertical cavity and the horizontal cavity; a first through hole is arranged on the vertical plate, and a second through hole is arranged on the horizontal plate;

[0013] An inner end of the horizontal cavity is provided with the vertical plate, one end of the first spring is connected to the vertical plate, the other end of the first spring is connected to the closing plate, a lower end of the closing plate is connected to the support plate, an outer end of the horizontal cavity is provided with an inlet of the pipe body, and the closing plate can block or separate from the inlet through sliding;

[0014] A lower end of the vertical cavity is provided with the horizontal plate, the column is supported above the horizontal plate, a cavity is arranged in the column, a recess is arranged at an upper end of the column, the fixing ring is fixed on a cavity wall of the vertical cavity, the rotating ring is arranged above the fixing ring, a first hole is arranged on the fixing ring, a second hole is arranged on the rotating ring, and the dial block is arranged above the rotating ring, wherein the dial block comprises a flat surface;

[0015] The box is provided with the piston plate, the second spring, the first limiting protrusion, and the second limiting protrusion, an opening is arranged on a peripheral wall of the box, the first limiting protrusion and the second limiting protrusion are located at 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, and one end of the second spring is connected to the piston plate;

[0016] A first threaded part and a second threaded part are arranged on the outer wall of the box in a vertical direction, a threaded section is arranged on the inner wall of the fixing ring, the first threaded part is engaged with the threaded section in a first state, the opening of the box faces upward, the cover is arranged on the opening of the box, the opening is shielded by the inner wall of the fixing ring, and the upper end of the column abuts against the box; in a second state, the cover is removed, the second threaded part is engaged with the threaded section, the other end of the second spring is placed into the recess, a gap exists between the column and the peripheral wall of the box, and the opening is located above the rotating ring.

[0017] Preferably, the lower end of the cover is provided with the retaining ring.

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

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

[0020] Further, the second threaded part is arranged 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 in communication with the outside.

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

[0027] Point 1 of the invention, in response to the first point raised in the background technology, also uses a common spring and a spare spring, but uses a box to protect the spare spring from 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 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] Point three of the invention, in response to the third point raised in the background technology, adopts the cooperation of a fixed ring and a rotating ring, both of which 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, which is convenient for shifting, so that the switching function can be realized by simple means.

[0030] Point 4 of the invention: 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 at each of the upper and lower ends of the box. The two threaded portions can be threadedly connected to the threaded section, so that the box can be connected to the fixing ring whether the box opening is facing upward or downward. When the box opening is facing upward, the opening is provided with a cover, which is sealed with a spring. When the box opening is facing downward, the spring extends into a groove prepared below to achieve fixation.

[0031] Invention point 5: 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 application will be further described below in conjunction with the drawings and examples.

[0033] Figure 1 is a three-dimensional view of the reheating box of the application.

[0034] Figure 2 is a flow path cross-sectional view of the pressure relief device when the application is operating normally.

[0035] Figure 3 is a cross-sectional view of the application when the standby pressure relief structure is opened and not in a pressure relief state.

[0036] Figure 4 is a cross-sectional view of the application when the standby pressure relief structure is opened and in a pressure relief state.

[0037] Figure 5 is a schematic view of the swivel of the application.

[0038] In the drawings, the reference signs are as follows:

[0039] 1, pressure relief device; 2, manual pressure discharge 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, swivel; 24, second hole; 25, box; 26, cover; 27, retaining ring; 28, second spring; 29, piston plate; 30, first limiting protrusion; 31, second limiting protrusion; 32, shifting block; 33, gap; 34, first spring; 35, support plate; 36, closure plate. DETAILED DESCRIPTION

[0040] As shown in the drawings: a pressure relief device, comprising a pipe body, a vertical plate, a horizontal plate, a column, a fixed ring, a swivel, 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 support plate, and a closure plate, the pipe body comprises a vertical section and a horizontal section, an arc surface is arranged on the pipe body between the vertical section and the horizontal section, a vertical cavity is arranged in the vertical section, a horizontal cavity is arranged in the horizontal section, and an intermediate cavity is arranged between the vertical cavity and the horizontal cavity; the vertical plate is provided with a first through hole, and the horizontal plate is provided with a second through hole;

[0041] the inner end of the horizontal cavity is provided with the vertical plate, one end of the vertical plate is connected to the first spring, the other end of the first spring is connected to the closure plate, the lower end of the closure plate is connected to the support plate, the outer end of the horizontal cavity is provided with the inlet of the pipe body, and the closure plate can block or separate from the inlet by sliding;

[0042] The lower end of the vertical cavity is provided with the horizontal plate, the horizontal plate supports the column above, the column is provided with a cavity, the upper end of the column is provided with a groove, the cavity wall of the vertical cavity is fixed with the fixed ring, the upper end of the fixed ring is provided with the rotating ring, the fixed ring is provided with a first hole, the rotating ring is provided with a second hole, the upper end of the rotating ring is provided with the shift block, the shift block comprises a plane;

[0043] The box is provided with a piston plate, a second spring, a first limiting protrusion and a second limiting protrusion, the peripheral wall of the box is provided with an opening, 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, and one end of the second spring is connected with the piston plate.

[0044] The outer wall of the box is provided with a first threaded part and a second threaded part in the vertical direction, the inner wall of the fixed ring is provided with a threaded section, the first threaded part is engaged with the threaded section in the first state, the opening of the box faces upward, and the cover is arranged on the opening of the box; the opening is shielded by the inner wall of the fixed ring; the upper end of the column abuts against the box; in the second state, the cover is removed, the second threaded part is engaged with the threaded section, the other end of the second spring is placed into 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 drawings: the lower end of the cover is provided with a retaining ring. In the first state, the retaining ring retains the other end of the second spring. The first threaded part and the second threaded part are located at the upper and lower ends of the opening. The second threaded part is arranged close to the opening of the box. The upper end of the pipe body is provided with a plug. The plug is provided with a gas hole. The vertical section comprises an upper section and a lower section. The inner wall of the upper section is threadedly connected with the outer wall of the lower section. When the piston plate is located above the opening, the inside of the box is in communication with the outside.

[0046] The above detailed description is for the specific description of the feasible embodiments of the present application, and the embodiments are not used to limit the patent scope of the present application. Any equivalent implementation or change without departing from the present application shall be included in the patent scope of the present application.

Claims

1. A pressure relief device, characterized in that: The utility model comprises a tube body, a vertical plate, a horizontal plate, a column, 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 shift block, a first spring, a support plate, and a closing plate. The tube body comprises 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 vertical plate is provided at the inner end of the horizontal cavity, 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 support plate, and the outer end of the horizontal cavity is provided with an inlet of the tube body, and the closing plate can be slid to block or detach from the inlet; 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 shift block is provided above the rotating ring, and the shift block includes a flat surface; 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 is facing upward, and the cover is provided 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 pressed against the box; in the second state, the cover is removed, the second threaded portion is engaged with the threaded segment, and 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 provided 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 the 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. The 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. The 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 in communication with the outside.

Images