Pressure balance safety regulating valve for dangerous chemical product storage tank

Abstract

The utility model belongs to the field of governing valve especially is a kind of dangerous chemical storage tank pressure balance safety governing valve, including first connecting pipe, the bottom fixed mounting of first connecting pipe has second connecting pipe, the middle part rotation of first connecting pipe is installed with valve shaft, the middle part fixed mounting of valve shaft has limit post, the middle part fixed mounting of first connecting pipe is installed with base in front side, the middle part rotation of base is installed with pivot, the pivot top rotation of pivot is installed with turnplate first spring is fixedly installed between the turnplate and base, the rear portion of turnplate is equipped with clamping groove, the utility model is fixed to limit post by clamping groove, so that it prevents being influenced by bottom pressure when using balance valve, improves precision, when not using balance valve, make it fixed to prevent leakage, and only right opening channel by piston. Can alleviate the problem of excessive pressure when using, can avoid backflow simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of regulating valves, specifically a pressure balancing safety regulating valve for hazardous chemical storage tanks. Background Technology

[0002] The pressure balance safety regulating valve for hazardous chemical storage tanks is a key safety control device installed on hazardous chemical storage tanks. It automatically senses changes in the gas phase pressure inside the tank and opens to release pressure when the pressure exceeds a set threshold or to replenish gas when there is negative pressure, so as to maintain the pressure balance inside the tank and prevent safety accidents such as tank deformation, rupture and explosion caused by overpressure or negative pressure.

[0003] During use, the structural design of the balancing valve may lead to jamming due to insufficient wear resistance of the valve core material or aging and failure of the seals, resulting in delayed pressure regulation or leakage. Furthermore, if the design of the connecting pipe diameter of each pipeline space is unreasonable, the pressure may not be able to be balanced quickly due to insufficient liquid flow rate, and even the risk of overpressure in the storage tank may be caused by flow restriction during emergency pressure relief. Utility Model Content

[0004] The purpose of this invention is to provide a pressure balancing safety regulating valve for hazardous chemical storage tanks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure balancing safety regulating valve for hazardous chemical storage tanks, comprising a first connecting pipe, a second connecting pipe fixedly installed at the bottom of the first connecting pipe, a valve shaft rotatably installed in the middle of the first connecting pipe, a limit post fixedly installed in the middle of the valve shaft, a base fixedly installed in the middle of the front side of the first connecting pipe, a rotating shaft rotatably installed in the middle of the base, a rotating plate rotatably installed on the top of the rotating shaft, a first spring fixedly installed between the rotating plate and the base, and a slot provided at the rear of the rotating plate.

[0006] Preferably, a third connecting pipe is fixedly installed on the right side of the first connecting pipe, the end of the third connecting pipe is fixedly connected to the second connecting pipe, a limit ring is fixedly installed on the right side inside the first connecting pipe, a sliding rod is fixedly installed on the upper and lower sides inside the limit ring, a piston is slidably installed in the middle of the limit ring, and a limit plate is fixedly installed on the upper and lower parts of the piston.

[0007] Preferably, a valve disc is fixedly mounted on the top of the valve shaft.

[0008] Preferably, a valve is provided at the top of the third connecting pipe.

[0009] Preferably, the limiting plate slides on the slide rod.

[0010] Preferably, the outer wall of the slide bar is provided with a second spring, and the two ends of the second spring are fixedly connected to the limiting plate and the limiting ring.

[0011] Preferably, a handle is fixedly installed at the middle of the end of the rotating plate.

[0012] Compared with existing technologies, the advantages of this invention are: by fixing the limiting post with a slot, the balance valve is prevented from being affected by bottom pressure during use, thus improving accuracy; when the balance valve is not in use, it is fixed to prevent leakage, and the piston can only open the channel to the right. This can alleviate the problem of excessive pressure during use and prevent backflow. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a pressure balancing safety regulating valve for a hazardous chemical storage tank proposed in this utility model. Figure 2 This is a partial structural schematic diagram of a pressure balancing safety regulating valve for a hazardous chemical storage tank proposed in this utility model; Figure 3 This is a schematic diagram of the internal structure of a pressure balancing safety regulating valve for a hazardous chemical storage tank proposed in this utility model.

[0014] In the diagram: 1. First connecting pipe; 2. Second connecting pipe; 3. Third connecting pipe; 4. Base; 5. Rotating shaft; 6. First spring; 7. Rotating plate; 8. Handle; 9. Valve shaft; 10. Valve disc; 11. Limiting post; 12. Slot; 13. Limiting ring; 14. Slide rod; 15. Limiting plate; 16. Second spring; 17. Piston; 18. Valve. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0018] Example 1, referring to Figures 1 to 3This is the first embodiment of the present invention, which provides a pressure balancing safety regulating valve for a hazardous chemical storage tank. It includes a first connecting pipe 1, a second connecting pipe 2 fixedly installed at the bottom of the first connecting pipe 1, a valve shaft 9 rotatably installed in the middle of the first connecting pipe 1, a professional balancing valve device installed at the bottom of the valve shaft 9 for adjusting and balancing the internal pressure, a limit post 11 fixedly installed in the middle of the valve shaft 9 (the limit post 11 is square), a base 4 fixedly installed in the middle of the front side of the first connecting pipe 1, a rotating shaft 5 rotatably installed in the middle of the base 4, a rotating plate 7 rotatably installed on the top of the rotating shaft 5, a first spring 6 fixedly installed between the rotating plate 7 and the base 4, and a slot 12 opened at the rear of the rotating plate 7, the opening size of the slot 12 being larger than the size of the limit post 11.

[0019] Specifically, a third connecting pipe 3 is fixedly installed on the right side of the first connecting pipe 1. The end of the third connecting pipe 3 is fixedly connected to the second connecting pipe 2. When in use, the liquid flowing from the second connecting pipe 2 into the first connecting pipe 1 will flow back to the second connecting pipe 2 from the right side through the third connecting pipe 3. A limiting ring 13 is fixedly installed on the right side inside the first connecting pipe 1. A sliding rod 14 is fixedly installed on the upper and lower sides inside the limiting ring 13. A piston 17 is slidably installed in the middle of the limiting ring 13. The liquid will be hydraulically squeezed by the piston 17, moving to the right and opening the channel to allow the liquid to flow to the third connecting pipe 3. A limiting plate 15 is fixedly installed on the upper and lower parts of the piston 17. Through the cooperation of the limiting plate 15 and the limiting ring 13, when the liquid squeezes the piston 17, it can prevent the liquid from flowing back to the left.

[0020] A valve disc 10 is fixedly installed on the top of the valve shaft 9, which facilitates the rotation of the valve shaft 9. A valve 18 is provided on the top of the third connecting pipe 3. A limiting plate 15 slides on the slide rod 14. A limiting device is installed at the end of the slide rod 14 to prevent the limiting plate 15 from disengaging from the slide rod 14. A second spring 16 is provided on the outer wall of the slide rod 14. The two ends of the second spring 16 are fixedly connected to the limiting plate 15 and the limiting ring 13. The second spring 16 can cause the piston 17 to rebound. A handle 8 is fixedly installed at the middle of the end of the rotating plate 7, which facilitates the rotation of the rotating plate 7.

[0021] When in use, rotating the rotating plate 7 causes the slot 12 on the rotating plate 7 to fix the limiting post 11, preventing it from rotating during use and thus affecting the precise adjustment of the balance valve. When the balance valve is in use, the liquid flowing from the second connecting pipe 2 to the first connecting pipe 1 will flow back to the second connecting pipe 2 from the right side through the third connecting pipe 3. When flowing to the third connecting pipe 3, the piston 17 can only move to the right to open the channel. When moving to the left, the limiting plate 15 is restricted by the limiting ring 13 and cannot open the left channel to avoid backflow.

[0022] In summary, by fixing the limiting post 11 with the slot 12, the balance valve is prevented from being affected by bottom pressure during use, thus improving accuracy. When the balance valve is not in use, it is fixed to prevent leakage, and the piston 17 can only open the passage to the right. This can alleviate the problem of excessive pressure during use and prevent backflow.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure balancing safety regulating valve for a hazardous chemical storage tank, comprising a first connecting pipe (1), characterized in that: A second connecting pipe (2) is fixedly installed at the bottom of the first connecting pipe (1). A valve shaft (9) is rotatably installed in the middle of the first connecting pipe (1). A limit post (11) is fixedly installed in the middle of the valve shaft (9). A base (4) is fixedly installed in the middle of the front side of the first connecting pipe (1). A rotating shaft (5) is rotatably installed in the middle of the base (4). A rotating plate (7) is rotatably installed on the top of the rotating shaft (5). A first spring (6) is fixedly installed between the rotating plate (7) and the base (4). A slot (12) is opened at the rear of the rotating plate (7). A third connecting pipe (3) is fixedly installed on the right side of the first connecting pipe (1). The end of the third connecting pipe (3) is fixedly connected to the second connecting pipe (2). A limit ring (13) is fixedly installed on the right side inside the first connecting pipe (1). A slide rod (14) is fixedly installed on the upper and lower sides inside the limit ring (13). A piston (17) is slidably installed in the middle of the limit ring (13). A limit plate (15) is fixedly installed on the upper and lower parts of the piston (17).

2. The pressure balancing safety regulating valve for a hazardous chemical storage tank according to claim 1, characterized in that: A valve disc (10) is fixedly installed on the top of the valve shaft (9).

3. The pressure balancing safety regulating valve for a hazardous chemical storage tank according to claim 2, characterized in that: A valve (18) is provided at the top of the third connecting pipe (3).

4. The pressure balancing safety regulating valve for a hazardous chemical storage tank according to claim 3, characterized in that: The limiting plate (15) slides on the slide bar (14).

5. A pressure balancing safety regulating valve for a hazardous chemical storage tank according to claim 4, characterized in that: The outer wall of the slide bar (14) is provided with a second spring (16), and the two ends of the second spring (16) are fixedly connected to the limiting plate (15) and the limiting ring (13).

6. A pressure balancing safety regulating valve for a hazardous chemical storage tank according to claim 5, characterized in that: A handle (8) is fixedly installed at the middle of the end of the rotating plate (7).

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