Chemical safety valve

Abstract

The utility model discloses a chemical safety valve which comprises a valve pipe, a tap pipe, a contact mechanism and a sealing mechanism, the contact mechanism and the sealing mechanism are installed at the upper end of the valve pipe, a first connecting shaft is connected to the inner wall of a first telescopic groove in a penetrating mode, a contact piece is fixedly arranged on the top of a spring, and a pressure sensor is installed on one side of the inner wall of the first telescopic groove. A floating ball is fixedly arranged at the other end of the first connecting shaft; according to the utility model, when the chemical pipeline is controlled and sealed through the valve pipe, and the internal pressure of the pipeline is overlarge due to the continuous increase of the fluid amount, the floating ball connected with the first connecting shaft is pressed to push the first connecting shaft to slide in the first telescopic groove, so that the contact piece at the upper end is in contact with the pressure sensor; and then a second connecting shaft in the sealing mechanism is driven to drive a sealing ball to move in the valve pipe, the sealing state in the valve pipe is relieved, fluid is discharged, pipeline breakage caused by too large internal pressure is prevented, and the use safety of the chemical safety valve is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical safety, specifically to a chemical safety valve. Background Technology

[0002] Chemical valves are important accessories for controlling the flow of media in chemical pipelines. For detailed principles and structural cross-sectional views, please refer to relevant reference books. Valves consist of three main parts: valve body, opening and closing mechanism, and valve cover. With the development of modern chemical production industry, the types of fluids and gases that need to be discharged during chemical production are increasing. Some of these gases and fluids are produced in large quantities. During discharge, in order to ensure that the pressure inside the pipeline is within a safe range, safety valves are needed to control the flow of the pipeline. With the development of technology, the types of safety valves have also increased accordingly.

[0003] However, in the use of existing chemical safety valves, if the pipelines are sealed by the safety valves, the fluid between the pipelines will continue to increase. When the fluid accumulates to a certain level, if the safety valve has not yet opened to release the fluid, it will cause the pipeline to over-pressurize and rupture. Such excessive fluid load is not immediately noticeable to external personnel, who may not be able to take safety measures such as opening the valve. Excessive pressure load on the pipeline can lead to pipeline rupture in a short period of time. In response to this, this design proposes a chemical safety valve. Utility Model Content

[0004] The purpose of this invention is to provide a chemical safety valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model proposes a chemical safety valve, including a valve pipe, a branch pipe, and a contact mechanism and a sealing mechanism both installed on the upper end of the valve pipe;

[0006] The contact mechanism includes a first telescopic groove formed on one side of the inner wall of the valve pipe, a first connecting shaft inserted through the inner wall of the first telescopic groove, a spring installed on the top of the first connecting shaft, a contact piece fixedly provided on the top of the spring, a pressure sensor installed on one side of the inner wall of the first telescopic groove, a limiting ring fixedly provided on the outer wall of the first connecting shaft, and one side of the limiting ring contacting the other side of the inner wall of the first telescopic groove, and a float fixedly provided at the other end of the first connecting shaft;

[0007] The sealing mechanism includes a second telescopic groove formed on the other side of the inner wall of the valve pipe, a second connecting shaft being inserted through the inner wall of the second telescopic groove, and a sealing ball being installed at the bottom of the second connecting shaft.

[0008] In one example, one end of the second connecting shaft passes through the top of the branch pipe and is connected to a support plate, and the branch pipe is installed on one side of the outer wall of the valve pipe.

[0009] In one example, a connecting rod is rotatably connected between one side of the top of the branch pipe and one side of the support plate, and an electric push rod is rotatably connected between the inner walls on both sides of the connecting rod.

[0010] In one example, a flow groove is provided in the middle of the inner wall of the valve pipe, and the inner wall of one end of the first expansion groove and the inner wall of one end of the second expansion groove are respectively connected to the inner wall of the flow groove.

[0011] In one example, one end of the pressure sensor is connected to a connecting wire through the outer wall of the valve pipe, and the pressure sensor is electrically connected to the electric push rod through the connecting wire.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a contact mechanism and a sealing mechanism on the valve pipe, when the chemical pipeline is controlled and sealed by the valve pipe, if the fluid volume continuously increases and the internal pressure of the pipeline becomes too high, the float connected to the first connecting shaft will be pressed and push the first connecting shaft to slide in the first telescopic groove, thereby causing the upper contact piece to contact the pressure sensor. This will drive the second connecting shaft in the sealing mechanism to move with the sealing ball in the valve pipe, thereby releasing the sealing state inside the valve pipe and discharging the fluid. This design can release the sealing state and discharge the fluid in the pipeline as soon as the pressure reaches the critical value when the valve seals the chemical pipeline, preventing the pipeline from rupturing due to excessive internal pressure and improving the safety of the chemical safety valve. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the valve pipe of this utility model;

[0015] Figure 3 Appendix to the specification of this utility model Figure 2 Enlarged structural diagram at point A;

[0016] Figure 4 Appendix to the specification of this utility model Figure 1 Enlarged structural diagram at point B.

[0017] In the diagram: 1. Valve pipe; 2. Branch pipe; 3. Contact mechanism; 301. First telescopic groove; 302. First connecting shaft; 303. Spring; 304. Contact plate; 305. Pressure sensor; 306. Limiting ring; 307. Float; 4. Sealing mechanism; 401. Second telescopic groove; 402. Second connecting shaft; 403. Sealing ball; 404. Support plate; 405. Connecting rod; 406. Electric push rod; 5. Flow groove; 6. Connecting line. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution: a chemical safety valve, including a valve pipe 1, a branch pipe 2, and a contact mechanism 3 and a sealing mechanism 4, both installed on the upper end of the valve pipe 1;

[0020] The contact mechanism 3 is characterized by the following features: A first telescopic groove 301 is formed on one side of the inner wall of the valve pipe 1; a first connecting shaft 302 is inserted through the inner wall of the first telescopic groove 301; a spring 303 is mounted on the top of the first connecting shaft 302; a contact piece 304 is fixedly mounted on the top of the spring 303; a pressure sensor 305 is mounted on one side of the inner wall of the first telescopic groove 301; a limiting ring 306 is fixedly mounted on the outer wall of the first connecting shaft 302, and one side of the limiting ring 306 contacts the other side of the inner wall of the first telescopic groove 301; a float 307 is fixedly mounted on the other end of the first connecting shaft 302; and the first connecting shaft 302 slides within the first telescopic groove 301 and is subject to the limiting ring 306 on its outer wall. The blocking limit of 6 prevents it from disengaging from the first telescopic groove 301. When the pressure inside the valve pipe 1 is too high, it will squeeze the float 307 at the bottom, thereby pushing the first connecting shaft 302 to slide in the first telescopic groove 301. The release piece 304 is connected to the first connecting shaft 302 by the spring 303, so that when the pressure sensor 305 is squeezed, the extension and contraction of the spring 303 will buffer the pressure sensor 305 and prevent excessive pressure from damaging the pressure sensor 305. The sealing mechanism 4 includes a second telescopic groove 401 opened on the other side of the inner wall of the valve pipe 1. The second connecting shaft 402 is inserted through the inner wall of the second telescopic groove 401, and a sealing ball 403 is installed at the bottom of the second connecting shaft 402.

[0021] In use, valve pipe 1 is installed between the valve pipe and the chemical discharge pipeline to control the discharge of fluid. At certain times, when the fluid cannot be discharged without unified treatment, valve pipe 1 needs to be closed to seal it and prevent the fluid from being discharged. As chemical production continues, the amount of treated discharge fluid increases, and since this fluid cannot be discharged due to the closure of valve pipe 1, the pressure inside the pipeline also increases. At this time, the pressure will squeeze the float 307, which will then push the first connecting shaft 302 to slide upward in the first telescopic groove 301, thereby causing the contact piece 304 connected to the upper end by the spring 303 to... The pressure sensor 305, which contacts the top of the inner wall of the first telescopic groove 301, sends a signal to control the second connecting shaft 402 in the sealing mechanism 4 to extend and retract in the second telescopic groove 401, pushing the sealing ball 403 to slide up and release the seal on the valve pipe 1, allowing the fluid to be discharged normally. This design can also take action when the pressure in the valve pipe 1 reaches a certain limit value, opening the valve pipe 1 as quickly as possible, reducing the risk of the connected pipeline rupture due to excessive pressure, and improving the safety of the chemical safety valve. Furthermore, the first telescopic groove 301 and the branch pipe 2 are both in a vertically upward state when the valve pipe 1 is installed.

[0022] Furthermore, one end of the second connecting shaft 402 passes through the top of the branch pipe 2 and is connected to a support plate 404, and the branch pipe 2 is installed on one side of the outer wall of the valve pipe 1.

[0023] A connecting rod 405 is rotatably connected between one side of the top of the branch pipe 2 and one side of the support plate 404. An electric push rod 406 is rotatably connected between the inner walls on both sides of the connecting rod 405. When the pressure sensor 305 is pressed and triggered, the electric push rod 406 connected to it through the connecting line 6 receives the electrical signal immediately and starts to extend and retract. The connecting rod 405 folds and extends on the branch pipe 2, thereby driving the support plate 404 and the second connecting shaft 402 to extend and retract. This allows the second connecting shaft 402 to slide through the second telescopic groove 401 with the sealing ball 403 in the valve pipe 1, controlling the opening and closing of the valve pipe 1, and realizing the purpose of automatic opening and closing of the valve pipe 1.

[0024] Furthermore, a flow groove 5 is provided in the middle of the inner wall of the valve pipe 1, and the inner wall of one end of the first expansion groove 301 and the inner wall of one end of the second expansion groove 401 are respectively connected to the inner wall of the flow groove 5. The inner wall size of the flow groove 5 is exactly the same as the outer size of the sealing ball 403, so that when the sealing ball 403 descends and gets stuck in the flow groove 5, it can seal it.

[0025] Furthermore, one end of the pressure sensor 305 passes through the outer wall of the valve pipe 1 and is connected to a connecting wire 6. The pressure sensor 305 is electrically connected to the electric push rod 406 through the connecting wire 6, so that the two can be controlled by electrical signals.

Claims

1. A chemical safety valve, comprising a valve pipe (1), a branch pipe (2), and a contact mechanism (3) and a sealing mechanism (4) both installed on the upper end of the valve pipe (1); Its features are: The contact mechanism (3) includes a first telescopic groove (301) opened on one side of the inner wall of the valve pipe (1), a first connecting shaft (302) is inserted through the inner wall of the first telescopic groove (301), a spring (303) is installed on the top of the first connecting shaft (302), a contact piece (304) is fixedly provided on the top of the spring (303), a pressure sensor (305) is installed on one side of the inner wall of the first telescopic groove (301), a limiting ring (306) is fixedly provided on the outer wall of the first connecting shaft (302), and one side of the limiting ring (306) contacts the other side of the inner wall of the first telescopic groove (301), and a float ball (307) is fixedly provided at the other end of the first connecting shaft (302). The sealing mechanism (4) includes a second telescopic groove (401) opened on the other side of the inner wall of the valve pipe (1), and a second connecting shaft (402) is inserted through the inner wall of the second telescopic groove (401). A sealing ball (403) is installed at the bottom of the second connecting shaft (402).

2. A chemical safety valve according to claim 1, characterized in that: One end of the second connecting shaft (402) passes through the top of the branch pipe (2) and is connected to a support plate (404), and the branch pipe (2) is installed on one side of the outer wall of the valve pipe (1).

3. A chemical safety valve according to claim 1, characterized in that: A connecting rod (405) is rotatably connected between one side of the top of the branch pipe (2) and one side of the support plate (404), and an electric push rod (406) is rotatably connected between the inner walls on both sides of the connecting rod (405).

4. A chemical safety valve according to claim 1, characterized in that: A flow groove (5) is provided in the middle of the inner wall of the valve pipe (1), and the inner wall of one end of the first expansion groove (301) and the inner wall of one end of the second expansion groove (401) are respectively connected to the inner wall of the flow groove (5).

5. A chemical safety valve according to claim 1, characterized in that: One end of the pressure sensor (305) passes through the outer wall of the valve pipe (1) and is connected to a connecting line (6), and the pressure sensor (305) is electrically connected to the electric push rod (406) through the connecting line (6).

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