An explosion-proof gate assembly and an explosion-proof gate valve

Abstract

The application discloses an explosion-proof gate plate assembly and an explosion-proof gate valve. The explosion-proof gate plate assembly comprises a communication pipe, the inner wall of the top end of the communication pipe is tightly connected with a supporting shell, and the supporting shell is provided with an explosion-proof mechanism. The explosion-proof mechanism comprises side sealing blocks and second side sealing blocks, and the side sealing blocks and the second side sealing blocks are respectively fixed on the inner walls of opposite sides of the supporting shell. The side sealing blocks are provided with pressure relief valves, and the gate plate is movably connected between the side sealing blocks and the second side sealing blocks. The inner wall of one side of the supporting shell is fixedly connected with a sealing partition plate, and the supporting shell, the sealing partition plate, the gate plate and the side sealing blocks form a pressure relief chamber. The sealing partition plate is fixedly connected with a liquid passage pipe, one end of the liquid passage pipe is arranged in the pressure relief chamber, and the other end of the liquid passage pipe is arranged in the output end of the communication pipe. The explosion-proof gate plate assembly and the explosion-proof gate valve have the effect of fast pressure relief under the sealed condition and effective explosion-proof effect.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to an explosion-proof gate assembly and an explosion-proof gate valve. Background Technology

[0002] A gate valve is a valve in which the closing element (gate) moves perpendicular to the centerline of the flow path. Gate valves are widely used, generally selected for shut-off devices with a diameter DN ≥ 50mm, and sometimes even for very small diameter shut-off devices. The opening and closing element of a gate valve is a gate, and the direction of the gate's movement is perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling.

[0003] When a gate valve is used in a high-pressure fluid environment, it may explode if the pressure exceeds the limits of the gate assembly or valve body. While simply relieving pressure can solve the overpressure problem, it is difficult to solve the overpressure problem in a relatively sealed environment if the flowing fluid cannot be discharged freely. Summary of the Invention

[0004] This invention discloses an explosion-proof gate assembly and an explosion-proof gate valve, aiming to solve the technical problem that if the flowing fluid cannot be discharged at will, it is difficult to solve the overpressure problem in a relatively sealed environment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An explosion-proof gate valve includes a connecting pipe, the inner wall of the top end of the connecting pipe being tightly connected to a supporting shell, and an explosion-proof mechanism being provided inside the supporting shell.

[0007] The explosion-proof mechanism includes a side sealing block and a second side sealing block, which are respectively fixed to the inner walls of opposite sides of the supporting shell. A pressure relief valve is provided on each side sealing block, and a gate is movably connected between the side sealing block and the second side sealing block. A sealing partition is fixedly connected to one inner wall of the supporting shell, and a pressure relief chamber is separated within the supporting shell by the sealing partition, the gate, and the side sealing blocks. A liquid-passing pipe is fixedly connected inside the sealing partition, with one end of the liquid-passing pipe placed inside the pressure relief chamber and the other end placed at the output end of the connecting pipe. A one-way valve is provided on one end of the liquid-conducting pipe and is fixed to one side of the outer wall of the supporting housing. An actuator is connected to the top outer wall of the gate and is also fixed to the top of the supporting housing. The three outer walls of the gate are respectively continuously attached to one side of the outer wall of the second side sealing block, the side sealing block and the sealing partition. The output end of the pressure relief valve faces the pressure relief chamber and the input end of the pressure relief valve faces the input end of the connecting pipe. The output end of the one-way valve faces the output end of the connecting pipe and the input end of the one-way valve faces the pressure relief chamber. Connecting flanges are provided at both ends of the connecting pipe.

[0008] By incorporating an explosion-proof mechanism, when fluid enters the support housing from the inlet of the connecting pipe, and the pressure at the inlet reaches the set pressure of the pressure relief valve, the pressure relief valve begins to release pressure from the fluid at the inlet. Excess fluid enters the pressure relief chamber for temporary storage until the pressure relief valve stops working. If continuous pressure relief is required, once the pressure relief chamber is full, the fluid flows through the liquid pipe to the outlet of the connecting pipe, thus relieving the pressure in the middle section of the gate valve and preventing damage to the components inside the gate valve under overpressure, thereby achieving an explosion-proof effect and realizing rapid pressure relief under sealed conditions.

[0009] An explosion-proof gate assembly includes an explosion-proof gate, a sliding groove sleeve movably fitted onto the outer wall of the explosion-proof gate, and a base provided on the inner wall of the bottom end of the sliding groove sleeve. A bottom blocking mechanism and a sliding groove blocking mechanism are simultaneously provided inside the sliding groove sleeve. A connecting frame is connected to the outer wall of the top end of the explosion-proof gate, and a drive screw is connected to the explosion-proof gate through the connecting frame. A sealing gasket is provided inside the bottom end of the base. Sliding grooves are provided on opposite sides of the sliding groove sleeve, and sliding groove blocking mechanisms are disposed within the sliding grooves. The bottom blocking mechanism includes two baffles, each with a locking groove, and the two baffles are interlocked through the locking grooves. Second sealing gaskets are provided on the outer walls of the top ends of the two baffles, and reset hinges are connected to opposite sides of the two baffles, with the two baffles respectively connected to the top end of the base via reset hinges.

[0010] With a bottom shielding mechanism, when the explosion-proof gate moves down and presses against the two baffles, the two baffles bend towards the bottom and gradually fit against the inner wall of the slide sleeve until the two baffles are perpendicular to the inside of the slide sleeve, just enough to make the second sealing gasket contact the explosion-proof gate to achieve the seal of the explosion-proof gate. When the explosion-proof gate moves up, the two baffles merge under the action of the reset hinge, shielding the base. This can effectively prevent debris or scale generated by fluids from entering the base and causing blockage, affecting the sealing of the bottom of the explosion-proof gate, and further ensuring the service life of the explosion-proof gate valve.

[0011] In a preferred embodiment, the slide block shielding mechanism includes two sliding sealing blocks, which are respectively disposed in two slide blocks. Conical extrusion frames are connected to the outer walls of opposite sides of the two sliding sealing blocks. A corrosion-resistant corrugated sleeve is fixedly connected to the bottom end of each sliding sealing block, and a spring is fixedly connected to the outer wall of the bottom end of the sliding sealing block. The corrosion-resistant corrugated sleeve is wrapped around the outside of the spring.

[0012] By incorporating a sliding groove shielding mechanism, during the downward sealing process of the explosion-proof gate, the bottom portion of the gate located within the groove presses against the top of the sliding sealing block, causing the sliding sealing block to move downward and compressing the spring. Simultaneously, because the top of the sliding sealing block is higher than the top of the baffle, and the conical compression frame is located between the two baffles, the conical compression frame presses against the two baffles during the downward movement of the sliding sealing block, facilitating their unfolding and preventing blockage. Furthermore, when the sliding sealing block is compressed to its lowest point, it is flush with the sealing gasket, thus not affecting the bottom sealing of the explosion-proof gate. When the spring springs up, it blocks within the groove, and the conical compression frame ensures that it does not shift during sliding, effectively preventing debris from falling from the groove and ensuring complete shielding.

[0013] As described above, an explosion-proof gate valve includes a connecting pipe. A supporting shell is tightly connected to the inner wall of the top end of the connecting pipe, and an explosion-proof mechanism is installed inside the supporting shell. The explosion-proof mechanism includes a side sealing block and a second side sealing block, which are respectively fixed to the inner walls of opposite sides of the supporting shell. A pressure relief valve is installed on the side sealing block, and a gate is movably connected between the side sealing block and the second side sealing block. A sealing partition is fixedly connected to one inner wall of the supporting shell, and a pressure relief chamber is separated within the supporting shell by the sealing partition, the gate, and the side sealing blocks. A liquid-passing pipe is fixedly connected inside the sealing partition, with one end of the liquid-passing pipe placed inside the pressure relief chamber and the other end placed at the output end of the connecting pipe. A one-way valve is installed on one section of the liquid-passing pipe, and the one-way valve is fixed to the outer wall of one side of the supporting shell. The explosion-proof gate assembly and explosion-proof gate valve provided by this invention have the technical effect of rapidly releasing pressure under sealed conditions, thus achieving effective explosion-proof performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall appearance structure of an explosion-proof gate valve proposed in this invention.

[0015] Figure 2 This is a cross-sectional view of an explosion-proof gate valve proposed in this invention.

[0016] Figure 3 This is a schematic diagram of the internal structure of an explosion-proof gate valve proposed in this invention.

[0017] Figure 4 This is a schematic diagram of the overall appearance structure of an explosion-proof gate assembly proposed in this invention.

[0018] Figure 5 This is a schematic diagram of the internal structure of an explosion-proof gate assembly proposed in this invention.

[0019] Figure 6 This is a schematic diagram of the bottom shielding mechanism of an explosion-proof gate assembly proposed in this invention.

[0020] Figure 7 This is a schematic diagram of the sliding groove blocking mechanism of an explosion-proof gate assembly proposed in this invention.

[0021] In the diagram: 1. Connecting flange; 2. Support shell; 3. Actuator; 4. Explosion-proof mechanism; 5. Connecting pipe; 6. Gate; 401. Pressure relief chamber; 402. Side sealing block; 403. Pressure relief valve; 404. Second side sealing block; 405. Liquid inlet pipe; 406. Check valve; 407. Sealing partition; 7. Drive screw; 8. Connecting frame; 9. Explosion-proof gate; 10. Slide sleeve; 11. Bottom shielding mechanism; 12. Slide shielding mechanism; 13. Sealing gasket; 14. Base; 1101. Reset hinge; 1102. Baffle; 1103. Second sealing gasket; 1104. Slot; 1201. Conical extrusion frame; 1202. Sliding sealing block; 1203. Corrosion-resistant corrugated sleeve; 1204. Spring. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Reference Figure 1-3 This embodiment discloses an explosion-proof gate valve, including a connecting pipe 5, the inner wall of the top end of the connecting pipe 5 is tightly connected to a supporting shell 2, and an explosion-proof mechanism 4 is provided inside the supporting shell 2;

[0024] The explosion-proof mechanism 4 includes a side sealing block 402 and a second side sealing block 404, which are respectively fixed on the inner walls of opposite sides of the supporting housing 2. A pressure relief valve 403 is provided on the side sealing block 402, and a gate 6 is movably connected between the side sealing block 402 and the second side sealing block 404. A sealing partition 407 is fixedly connected to one side of the inner wall of the supporting housing 2, and a pressure relief chamber 401 is separated from the supporting housing 2 by the sealing partition 407, the gate 6, and the side sealing block 402. A liquid passage pipe 405 is fixedly connected inside the sealing partition 407, with one end of the liquid passage pipe 405 placed inside the pressure relief chamber 401 and the other end of the liquid passage pipe 405 placed at the output end of the connecting pipe 5. A one-way valve 406 is provided on one section of the liquid passage pipe 405, and the one-way valve 406 is fixed to one side of the outer wall of the supporting housing 2.

[0025] Reference Figure 3 In a preferred embodiment, the top outer wall of the gate 6 is connected to the driver 3, and the driver 3 is also fixed to the top of the supporting housing 2. The three outer walls of the gate 6 are continuously attached to one side outer wall of the second side sealing block 404, the side sealing block 402 and the sealing partition 407, respectively.

[0026] Reference Figure 2 and Figure 3 In a preferred embodiment, the output end of the pressure relief valve 403 faces the pressure relief chamber 401, and the input end of the pressure relief valve 403 faces the input end of the connecting pipe 5. The output end of the one-way valve 406 faces the output end of the connecting pipe 5, and the input end of the one-way valve 406 faces the pressure relief chamber 401. Connecting flanges 1 are respectively provided at both ends of the connecting pipe 5.

[0027] Reference Figure 4 An explosion-proof gate assembly includes an explosion-proof gate 9, with a sliding groove sleeve 10 movably sleeved on the outer wall of the explosion-proof gate 9, and a base 14 provided on the inner wall of the bottom end of the sliding groove sleeve 10. The sliding groove sleeve 10 is also provided with a bottom blocking mechanism 11 and a sliding groove blocking mechanism 12.

[0028] Reference Figure 4 and Figure 5 In a preferred embodiment, the top outer wall of the explosion-proof gate 9 is connected to a connecting frame 8, and the explosion-proof gate 9 is connected to a drive screw 7 through the connecting frame 8. A sealing gasket 13 is provided in the bottom end of the base 14. The opposite sides of the slide sleeve 10 are respectively provided with slide grooves, and the slide groove blocking mechanism 12 is provided in the slide groove.

[0029] Reference Figure 5 and Figure 7 In a preferred embodiment, the bottom blocking mechanism 11 includes two baffles 1102, and each of the two baffles 1102 is provided with a slot 1104, and the two baffles 1102 are engaged with each other through the slots 1104.

[0030] Reference Figure 7 In a preferred embodiment, the top outer walls of the two baffles 1102 are respectively provided with second sealing gaskets 1103, and the opposite sides of the two baffles 1102 are respectively connected to reset hinges 1101, and the two baffles 1102 are respectively connected to the top of the base 14 through reset hinges 1101.

[0031] Reference Figure 5 and Figure 6 In a preferred embodiment, the slide block blocking mechanism 12 includes two sliding sealing blocks 1202, and the two sliding sealing blocks 1202 are respectively disposed in two slides. The outer walls of the opposite sides of the two sliding sealing blocks 1202 are simultaneously connected to a conical extrusion frame 1201.

[0032] Reference Figure 6 In a preferred embodiment, each sliding sealing block 1202 is fixedly connected to a corrosion-resistant corrugated sleeve 1203 at its bottom end, and a spring 1204 is fixedly connected to the outer wall of the bottom end of the sliding sealing block 1202, with the corrosion-resistant corrugated sleeve 1203 wrapped around the outside of the spring 1204.

[0033] Working principle of the invention:

[0034] In use, in the explosion-proof mechanism 4, when fluid enters the support housing 2 from the input end of the connecting pipe 5, when the pressure in the input end reaches the set pressure of the pressure relief valve 403, the pressure relief valve 403 begins to relieve pressure on the fluid in the input end. Excess fluid enters the pressure relief chamber 401 for temporary storage until the pressure relief valve 403 stops working. If continuous pressure relief is required, when the fluid in the pressure relief chamber 401 is full, it enters the output end of the connecting pipe 5 through the liquid passage pipe 405, which can relieve the pressure in the middle section of the gate valve and prevent the components inside the gate valve from being damaged under the influence of overpressure, thereby playing an explosion-proof role and achieving the purpose of rapid pressure relief under sealed conditions.

[0035] In the explosion-proof gate assembly, when the explosion-proof gate 9 moves down and presses against the two baffles 1102, the two baffles 1102 bend towards the bottom and gradually fit against the inner wall of the slide sleeve 10 until the two baffles 1102 are perpendicular to the inside of the slide sleeve 10, so that the second sealing gasket 1103 contacts the explosion-proof gate 9 to achieve the sealing of the explosion-proof gate 9. When the explosion-proof gate 9 moves up, the two baffles 1102 merge under the action of the reset hinge 1101 and block the base 14, which can effectively prevent debris or scale generated by fluid from entering the base 14 and causing blockage that affects the sealing of the bottom of the explosion-proof gate 9, and further ensure the service life of the explosion-proof gate valve.

[0036] During the downward sealing process, the bottom part of the explosion-proof gate 9 located in the groove presses against the top of the sliding sealing block 1202, causing the sliding sealing block 1202 to move downward and compressing the spring 1204. Since the top of the sliding sealing block 1202 is higher than the top of the baffle 1102, and the conical compression frame 1201 is located between the two baffles 1102, the conical compression frame 1201 compresses the two baffles 1102 during the downward movement of the sliding sealing block 1202, facilitating the unfolding of the two baffles 1102 and preventing blockage. Furthermore, when the sliding sealing block 1202 is compressed to its lowest point, it is level with the sealing gasket 13, thus not affecting the bottom sealing of the explosion-proof gate 9. When the spring 1204 springs up, it can be blocked in the groove. The conical compression frame 1201 ensures that it does not shift during sliding, effectively preventing debris from falling from the groove and ensuring complete shielding.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An explosion-proof gate valve, comprising a connecting pipe (5) and an explosion-proof gate assembly, characterized in that, The inner wall of the top end of the connecting pipe (5) is tightly connected to a supporting shell (2), and an explosion-proof mechanism (4) is provided inside the supporting shell (2). The explosion-proof mechanism (4) includes a side sealing block (402) and a second side sealing block (404), and the side sealing block (402) and the second side sealing block (404) are respectively fixed to the inner walls of opposite sides of the supporting shell (2). A pressure relief valve (403) is provided on the side sealing block (402), and a gate (6) is movably connected between the side sealing block (402) and the second side sealing block (404). A sealing partition (407) is fixedly connected to one side of the inner wall of the supporting shell (2), and the sealing partition (407), the gate (6) and the side sealing block (402) separate the pressure relief chamber (401) inside the supporting shell (2). A liquid passage pipe (405) is fixedly connected inside the sealing partition (407), and one end of the liquid passage pipe (405) is placed inside the pressure relief chamber (401), and the other end of the liquid passage pipe (405) is placed at the output end of the connecting pipe (5). A one-way valve (406) is provided on one section of the liquid passage pipe (405), and the one-way valve (406) is fixed to one side of the outer wall of the supporting shell (2). The explosion-proof gate assembly includes an explosion-proof gate (9), characterized in that a sliding groove sleeve (10) is movably sleeved on the outer wall of the explosion-proof gate (9), and a base (14) is provided on the inner wall of the bottom end of the sliding groove sleeve (10). A bottom blocking mechanism (11) and a sliding groove blocking mechanism (12) are provided inside the sliding groove sleeve (10). The explosion-proof gate (9) is connected to a connecting frame (8) on its top outer wall, and the explosion-proof gate (9) is connected to a drive screw (7) through the connecting frame (8). A sealing gasket (13) is provided in the bottom end of the base (14). The opposite sides of the sliding sleeve (10) are respectively provided with sliding grooves, and the sliding groove blocking mechanism (12) is provided in the sliding groove. The bottom blocking mechanism (11) includes two baffles (1102), and each of the two baffles (1102) is provided with a slot (1104), and the two baffles (1102) are engaged with each other through the slots (1104); The top outer walls of the two baffles (1102) are respectively provided with second sealing gaskets (1103), and the opposite sides of the two baffles (1102) are respectively connected with reset hinges (1101), and the two baffles (1102) are respectively connected to the top of the base (14) through reset hinges (1101).

2. The explosion-proof gate valve according to claim 1, characterized in that, The top outer wall of the gate (6) is connected to a driver (3), and the driver (3) is also fixed to the top of the supporting shell (2). The three outer walls of the gate (6) are continuously attached to one side outer wall of the second side sealing block (404), the side sealing block (402) and the sealing partition (407).

3. The explosion-proof gate valve according to claim 1, characterized in that, The output end of the pressure relief valve (403) faces the pressure relief chamber (401), and the input end of the pressure relief valve (403) faces the input end of the connecting pipe (5). The output end of the one-way valve (406) faces the output end of the connecting pipe (5), and the input end of the one-way valve (406) faces the pressure relief chamber (401). Connecting flanges (1) are respectively provided at both ends of the connecting pipe (5).

4. The explosion-proof gate valve according to claim 1, characterized in that, The slide block shielding mechanism (12) includes two sliding sealing blocks (1202), and the two sliding sealing blocks (1202) are respectively arranged in two slides. The outer walls of the opposite side of the two sliding sealing blocks (1202) are simultaneously connected to a conical extrusion frame (1201).

5. The explosion-proof gate valve according to claim 4, characterized in that, Each of the sliding sealing blocks (1202) is fixedly connected to a corrosion-resistant corrugated sleeve (1203) at its bottom end, and a spring (1204) is also fixedly connected to the outer wall of the bottom end of the sliding sealing block (1202). The corrosion-resistant corrugated sleeve (1203) is wrapped around the outside of the spring (1204).

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