Automatic pressure release valve

Abstract

The utility model relates to an automatic pressure release valve which comprises a pressure release valve body and a pressure release valve rod moving in the pressure release valve body, an exhaust hole is formed in the pressure release valve body, a sealing ring is arranged in the pressure release valve body, an air channel is formed between the sealing ring and the pressure release valve body, and sealing and circulation of the air channel are controlled through a clutch mechanism between the sealing ring and the pressure release valve rod. According to the automatic pressure relief valve, the pressure relief hole is formed in the pressure cooker cover, and the pressure relief valve body is installed at the pressure relief hole, so that an emergency pressure relief mode is added to the pressure cooker, and the technical problems that an existing pressure cooker is single in exhaust pressure relief mode and has certain potential safety hazards are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric pressure cooker, especially relates to an automatic pressure relief valve. BACKGROUND

[0002] In real life, pressure cooker is also called high pressure cooker, can greatly shorten the time of cooking, save energy. The principle of pressure cooker is according to the boiling point of water is influenced by air pressure, the higher the air pressure, the higher the boiling point. In order to enable the pressure cooker to reach a certain air pressure, and when the air pressure in the pot exceeds the safe range, it can vent outward, usually a pressure limiting valve is arranged on the pot cover.

[0003] However, the pressure cooker on the market only controls the pressure in the pot by the opening and closing of a pressure limiting valve, but because there is only this kind of pressure relief way, once the pressure limiting valve fails, the pressure in the pot will rise rapidly, and because there is no other exhaust pressure relief structure, there will be a big safety hazard. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an automatic pressure relief valve to solve the technical problem that the existing pressure cooker exhaust pressure relief way is single and has certain safety hazard.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme of an automatic pressure relief valve, including pressure relief valve body and pressure relief valve rod that moves in the pressure relief valve body, the pressure relief valve body is provided with exhaust hole, the pressure relief valve body is equipped with sealing ring, the sealing ring and the pressure relief valve body form air channel, the sealing ring and the pressure relief valve rod are controlled the sealing and the circulation of the air channel through the clutch mechanism between them.

[0006] Further, the clutch mechanism includes the clamping part that is arranged on the outer wall of the pressure relief valve rod and the clamping groove that is arranged on the sealing ring, when the clamping part is clamped in the clamping groove, the air channel is in the sealed state, when the clamping part is separated from the clamping groove, the air channel is in the circulation state.

[0007] Further, the clamping groove is arc-shaped clamping groove, the shape of the clamping part is matched with the clamping groove, and the clamping part and the pressure relief valve rod are integrally formed.

[0008] Further, the pressure relief valve body forms cavity, the inner wall of the pressure relief valve body is equipped with the clamping edge, the outer wall of the sealing ring is equipped with the outer clamping groove that is matched with the clamping edge, the sealing ring and the pressure relief valve body are detachably connected through the cooperation of the clamping edge and the outer clamping groove.

[0009] Further, the top of the pressure relief valve body is provided with the through hole that is used for the movement of the pressure relief valve rod, the through hole is connected with the air channel, the pressure relief valve rod moves up and down in the through hole, the diameter of the clamping part is greater than the hole diameter of the through hole, and the pressure relief valve rod is limited in the pressure relief valve body.

[0010] Further, the pressure relief valve body is externally provided with a fixing nut, an accommodating groove is formed in the upper end of the fixing nut, and an O-ring is installed in the accommodating groove.

[0011] Further, the pressure relief valve body is externally provided with a fixing nut, an accommodating groove is formed in the upper end of the fixing nut, and an O-ring is installed in the accommodating groove.

[0012] By the technical scheme, the utility model discloses the following beneficial effects compared with the prior art: the pressure relief valve is arranged on the pressure cooker cover to increase an emergency pressure relief mode of the pressure cooker, specifically, the automatic pressure relief mode is realized through the cooperation of the pressure relief valve body, the pressure relief valve rod and the sealing ring, one pressure relief hole is arranged on the pressure cooker cover, the pressure relief valve body is fixed in the pressure relief hole of the pressure cooker cover through the fixing nut, one end of the pressure relief valve rod in the pressure relief valve body extends into the pressure cooker cover, when the pressure relief valve and the safety valve of the pressure cooker fail during use, the pressure relief valve body starts to work, under the action of the pressure in the pressure cooker, the pressure relief valve rod that is clamped on the sealing ring through the clutch mechanism moves upward, when reaching a specific pressure value, the pressure relief valve rod is separated from the sealing ring, so that the air passage in the pressure relief valve body is communicated, the central air release valve rod is in the upward open state, and the gas is discharged outward through the air passage and the exhaust hole in the air release valve body, so that the pressure relief work is realized, the pressure cooker still has the pressure relief function when the pressure relief valve fails, the safety of the pressure cooker is increased, and the technical problems of single exhaust pressure relief mode and certain safety hazards of the existing pressure cooker are solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is an explosion diagram of the utility model;

[0016] Figure 3 It is a pressure relief valve rod clamping state structural schematic diagram of the utility model;

[0017] Figure 4This is a schematic diagram of the pressure relief valve stem in the separated state of this utility model;

[0018] The utility model reference information is as follows:

[0019] 1. Pressure relief valve body; 2. Pressure relief valve stem; 3. Sealing ring; 4. Fixing nut; 101. Exhaust port; 102. Through hole; 103. Air passage; 104. Clamping edge; 201. Engaging part; 301. Clamping groove; 302. External clamping groove; 401. Receiving groove;

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The following will refer to the appendix in the embodiments of this utility model. Figures 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. 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 protection scope of this utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0024] like Figures 1-4 As shown: An automatic pressure relief valve includes a pressure relief valve body 1 and a pressure relief valve stem 2 movable within the pressure relief valve body 1. The pressure relief valve body 1 has an exhaust port 101 and a sealing ring 3 inside the pressure relief valve body 1. An air passage 103 is formed between the sealing ring 3 and the pressure relief valve body 1. The sealing ring 3 and the pressure relief valve stem 2 are connected by a clutch mechanism to control the sealing and flow of the air passage 103.

[0025] In this embodiment, the pressure relief valve body 1 and the pressure relief valve stem 2 are made of aluminum alloy, and the sealing ring 3 is made of rubber. The bottom of the pressure relief valve body 1 has an opening, which is the air inlet of the pressure relief valve body 1. When the pressure relief valve body 1 is installed on the pressure cooker lid, the opening corresponds to the inside of the pressure cooker. When pressure is generated inside the pressure cooker, the gas will push the pressure relief valve stem 2, which passes through the pressure relief valve body 1, upward through the opening, and then enter the air passage of the pressure relief valve body 1, and finally be discharged outward from the exhaust port 101 of the pressure relief valve body 1.

[0026] like Figures 3-4 As shown: The clutch mechanism includes a locking part 201 encircling the outer wall of the pressure relief valve stem 2 and a locking groove 301 formed on the sealing ring 3. When the locking part 201 is engaged in the locking groove 301, the air passage 103 is in a sealed state; when the locking part 201 is disengaged from the locking groove 301, the air passage 103 is in a free-flowing state. The cooperation between the sealing ring 3 and the locking part 201 can increase the sealing performance of both. In this embodiment, the pressure value of the pressure relief valve is 180kPa-300kPa.

[0027] like Figures 3-4 As shown: the slot 301 is an arc-shaped slot, and the shape of the engaging part 201 matches the slot 301. The engaging part 201 and the pressure relief valve stem 2 are integrally formed. The arc-shaped slot design can facilitate the separation of the pressure relief valve stem 2 and the sealing ring 3 without affecting the sealing performance. The integral forming design of the engaging part 201 and the pressure relief valve stem 2 increases stability.

[0028] like Figures 2-4 As shown: A cavity is formed inside the pressure relief valve body 1. A retaining edge 104 is provided on the inner wall of the pressure relief valve body 1. An outer retaining groove 302 matching the retaining edge 104 is provided on the outer wall of the sealing ring 3. The sealing ring 3 and the pressure relief valve body 1 are detachably connected by the cooperation of the retaining edge 104 and the outer retaining groove 302. In this embodiment, the retaining edge 104 is integrally formed and ring-shaped on the inner wall of the pressure relief valve body 1. The way the retaining edge 104 and the outer retaining groove 302 are connected facilitates the assembly and replacement of the product.

[0029] like Figures 1-4 As shown: The top of the pressure relief valve body 1 has a through hole 102 for the movement of the pressure relief valve rod 2. The through hole 102 is connected to the air passage 103. The pressure relief valve rod 2 moves up and down in the through hole 102. The diameter of the locking part 201 is larger than the diameter of the through hole 102, which restricts the pressure relief valve rod 2 in the pressure relief valve body 1. When the pressure relief valve rod 2 is lifted by the air pressure, one end of it will extend to the outside through the through hole 102. The through hole 102 provides the pressure relief valve rod 2 with sufficient room to move.

[0030] like Figures 1-4As shown: A fixing nut 4 is provided on the outside of the pressure relief valve body 1. A receiving groove 401 is opened at the upper end of the fixing nut 4, and an O-ring is installed in the receiving groove 401. In this embodiment, the outer surface of the pressure relief valve body 1 is provided with an external thread that matches the fixing nut 4.

[0031] It also includes a pressure cooker lid with a pressure relief valve. The pressure cooker lid has a pressure relief hole. The pressure relief valve body 1 is installed at the pressure relief hole and locked in place by a fixing nut 4. In this embodiment, the fixing nut 4 is a hexagonal nut. When the pressure relief valve body 1 is installed on the pressure cooker lid, the O-ring fits into the pressure relief hole to increase the overall sealing.

[0032] The working principle and beneficial effects of this utility model are as follows:

[0033] This structure achieves automatic pressure relief through the cooperation of the pressure relief valve body 1, the pressure relief valve stem 2, and the sealing ring 3. Specifically, a pressure relief hole is provided on the pressure cooker lid. The pressure relief valve body 1 is installed and fixed to the pressure relief hole on the pressure cooker lid using a fixing nut 4, so that one end of the pressure relief valve rod 2 inside the pressure relief valve body 1 extends into the pressure cooker lid. During use, when the pressure limiting valve and safety valve of the pressure cooker fail, the pressure relief valve body 1 will start working. Due to the pressure inside the pot, the pressure relief valve rod 2, which is normally locked on the sealing ring 3 by the clutch mechanism, will move upward. When a specific pressure value is reached, the pressure relief valve rod 2 will disengage from the sealing ring 3, thereby allowing the air passage 103 inside the pressure relief valve body 1 to flow. At this time, the central venting valve rod 2 will be in the upward open state, and the gas will be exhausted outward through the air passage 103 and the exhaust hole 101 on the venting valve body 1, thus realizing the pressure relief operation. By setting this pressure relief valve on the pressure cooker lid, an additional means of pressure relief is added. When the pressure limiting valve fails, the pressure cooker still has the pressure relief function, thereby increasing the safety of the pressure cooker and solving the technical problem that the existing pressure cooker has a single method of venting and releasing pressure, which poses certain safety hazards.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An automatic pressure relief valve, comprising a pressure relief valve body (1) and a pressure relief valve stem (2) movable within the pressure relief valve body (1), wherein the pressure relief valve body (1) is provided with an exhaust port (101), characterized in that: The pressure relief valve body (1) is provided with a sealing ring (3), and an air passage (103) is formed between the sealing ring (3) and the pressure relief valve body (1). The sealing ring (3) and the pressure relief valve stem (2) are connected by a clutch mechanism to control the sealing and flow of the air passage (103).

2. An automatic pressure relief valve according to claim 1, characterized in that: The clutch mechanism includes a locking part (201) circumferentially disposed on the outer wall of the pressure relief valve stem (2) and a slot (301) formed on the sealing ring (3). When the locking part (201) is engaged in the slot (301), the air passage (103) is in a sealed state; when the locking part (201) is disengaged from the slot (301), the air passage (103) is in a free-flowing state.

3. An automatic pressure relief valve according to claim 2, characterized in that: The slot (301) is an arc-shaped slot, and the shape of the engaging part (201) matches the slot (301). The engaging part (201) and the pressure relief valve stem (2) are integrally formed.

4. An automatic pressure relief valve according to claim 1, characterized in that: The pressure relief valve body (1) has a cavity inside. The inner wall of the pressure relief valve body (1) is provided with a retaining edge (104). The outer wall of the sealing ring (3) is provided with an outer retaining groove (302) that matches the retaining edge (104). The sealing ring (3) and the pressure relief valve body (1) are detachably connected by the cooperation of the retaining edge (104) and the outer retaining groove (302).

5. An automatic pressure relief valve according to claim 2, characterized in that: The pressure relief valve body (1) has a through hole (102) at the top for the movement of the pressure relief valve rod (2). The through hole (102) is connected to the air passage (103). The pressure relief valve rod (2) moves up and down in the through hole (102). The diameter of the locking part (201) is larger than the diameter of the through hole (102) to restrict the pressure relief valve rod (2) in the pressure relief valve body (1).

6. An automatic pressure relief valve according to any one of claims 1-5, characterized in that: The pressure relief valve body (1) is provided with a fixing nut (4), and the upper end of the fixing nut (4) is provided with a receiving groove (401), and an O-ring is installed in the receiving groove (401).

7. An automatic pressure relief valve according to claim 6, characterized in that: It also includes a pressure cooker lid with a pressure relief valve, the pressure cooker lid having a pressure relief hole, the pressure relief valve body (1) being installed at the pressure relief hole and locked in place by a fixing nut (4).

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