Liquefied gas type emergency cut-off valve

Abstract

The utility model provides a liquefied gas type emergency cut-off valve which comprises a valve body and a blocking mechanism. A first through hole and a second through hole are formed in the two ends of the valve body respectively, the first through hole is communicated with the second through hole, a partition is arranged between the first through hole and the second through hole and separates the first through hole from the second through hole, and a hole to be opened and closed is formed in the partition and used for communicating the first through hole with the second through hole. The blocking mechanism comprises a pressing head, a mounting frame shell, a driving mechanism and a blocking assembly, the driving mechanism is arranged in the mounting frame shell, a connecting end is arranged at the top of the mounting frame shell, the center of the pressing head extends downwards to form a connecting rod, and the connecting rod penetrates through the connecting end to be connected with the driving mechanism. The liquefied gas type emergency cut-off valve solves the problem that in the prior art, when an air pipe is cut off and the air pressure above a valve plate is large, the valve plate is located above a partition and tightly pressed above the partition, and consequently the valve plate is difficult to open an air hole.

Description

Technical Field

[0001] The utility model relates to the technical field of cut-off valves, in particular to a liquefied gas emergency cut-off valve. Background Art

[0002] Liquefied gas is a flammable and explosive gas. If it leaks during transportation or daily use, it will cause great harm to people's life safety and the surrounding environment. Liquefied gas is stored in liquefied gas tanks, which are equipped with gas emergency shut-off valves. The gas emergency shut-off valve is used to cut off the discharge pipeline of the liquefied gas tank in case of gas leakage.

[0003] like Figure 1 As shown, in the prior art, the gas emergency shut-off valve includes: a gas pipe, a baffle, a valve plate and a valve stem. The baffle is arranged on the inner wall of the gas pipe, and an air hole is opened in the baffle. The valve stem passes through the air hole. A valve plate is arranged on the valve stem, and the valve plate is located above the baffle. When the gas leaks, the valve stem moves downward, so that the valve plate blocks the gap, thereby cutting off one end of the gas injection leakage. Because the valve stem is not equipped with a limiting mechanism, the valve plate will be displaced after a long period of use, resulting in the valve plate being unable to align with the gap for sealing. At the same time, the valve plate is installed above the baffle. When the shut-off valve needs to be opened, due to the high air pressure above the valve plate, the valve plate receives air pressure resistance when opening, making it impossible for the shut-off valve to open normally. Summary of the invention

[0004] The utility model provides a liquefied gas emergency shut-off valve to solve the problem in the prior art that when the air pipe is cut off and the air pressure above the valve plate is high, the valve plate is located above the baffle and is pressed tightly above the baffle, making it difficult for the valve plate to open the air hole.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the utility model proposes a liquefied gas emergency shut-off valve, including: a valve body and a blocking mechanism; a first through hole and a second through hole are respectively opened at both ends of the valve body, the first through hole is connected to the second through hole, a baffle is provided between the first through hole and the second through hole, the baffle separates the first through hole and the second through hole, a hole to be opened and closed is opened on the baffle, and the hole to be opened and closed is used to connect the first through hole and the second through hole; the blocking mechanism includes: a push head, a mounting frame shell, a driving mechanism and a blocking assembly, and a driving mechanism is provided inside the mounting frame shell Mechanism, a connecting end is provided on the top of the mounting frame shell, a connecting rod extends downward from the center of the push head, the connecting rod passes through the connecting end and is connected to the driving mechanism, a blocking component is provided at the output end of the driving mechanism, the blocking component is used to block the hole to be opened and closed, and a spring is installed between the blocking component and the bottom wall of the valve body; the hole to be opened and closed of the blocking hole is threadedly connected with a head to be opened and closed, the head to be opened and closed is a cylindrical structure, and the inner hole of the head to be opened and closed is for the output end of the driving mechanism to pass through; the blocking component is detachably installed at the output end of the driving mechanism, and the blocking component is located below the head to be opened and closed, and the blocking component cannot pass through the inner hole of the head to be opened and closed.

[0006] Preferably, the driving mechanism includes: a permanent magnet, an electromagnet, a connecting head, a connecting frame and a telescopic rod. A connecting head is provided in the mounting frame housing, the top of the connecting head is used to install a push head, the bottom of the connecting head is installed with the telescopic rod, the telescopic rod passes through the connecting frame, the connecting frame is fixed in the mounting frame housing, and a permanent magnet is fixed on the telescopic rod; an electromagnet is installed below the permanent magnet, the electromagnet is used to connect to external AC power, the telescopic rod passes through the mounting frame housing and is connected to the sealing head, and the bottom end of the telescopic rod is the output end of the driving mechanism.

[0007] Preferably, the plugging assembly includes: a plugging head, which is threadedly connected to the telescopic rod, and is used to plug the inner hole of the head to be opened and closed.

[0008] Preferably, the mounting frame shell includes: a shell body and an intermediate ring, a connecting frame, an electromagnet and a permanent magnet are installed in the shell body, a push head is installed on the top of the shell body, and an intermediate ring is installed on the bottom of the shell body, and the intermediate ring is used to connect the shell body with the valve body.

[0009] Preferably, a connecting hole is provided on the side wall of the shell body, and a mounting groove is provided on the top of the middle connecting head. The connecting hole is for the welding column to extend into, and the mounting groove is for the welding column to extend into. The welding column is welded to the shell body.

[0010] Preferably, a sealing layer is provided between the bottom of the shell body and the middle connecting head. The sealing layer is a cover-like structure. The sealing layer allows the telescopic rod to pass through. A sealing ring is fixed to the bottom of the middle connecting head. The sealing ring seals the gap between the telescopic rod and the middle connecting head. The sealing ring allows the telescopic rod to pass through, and the sealing ring does not block the movement of the telescopic rod.

[0011] Preferably, the intermediate connecting head is threadedly connected to the valve body.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the present application, firstly, a baffle is set to divide the inner hole of the valve body into two sections, which sets the condition for the opening and closing position of the subsequent valve plate; then, a head to be opened and closed is installed at the hole to be opened and closed of the baffle, and the head to be opened and closed is passed through by the output end of the driving mechanism, and there is a gap between the head to be opened and closed and the output end of the driving mechanism, so that the blocking component can open and close the gap between the head to be opened and closed and the output end of the driving mechanism, and the head to be opened and closed blocks the blocking component at the bottom of the valve body, thereby preventing the bottom of the output end of the driving mechanism from jumping over the head to be opened and closed, and realizing the bottom of the output end of the driving mechanism Since the valve body and the partition are designed as a whole, how to ensure that the blocking component is installed below the partition and limit the blocking component from jumping over the partition is a problem to be solved by the opening and closing head, and a certain effect has been achieved; then, the blocking component (equivalent to the valve sheet in the prior art) is set below the partition and the opening and closing head. When the blocking component closes the opening and closing head, the air pressure above the blocking component becomes larger, and the larger air pressure will not affect the descent of the blocking component to open the opening and closing head, thereby ensuring that the opening and closing function of the blocking component can be realized normally.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the valve plate of the gas emergency shut-off valve in the prior art.

[0016] Figure 2 It is a structural schematic diagram of a liquefied gas emergency shut-off valve.

[0017] Figure 3 It is a cross-sectional view of a liquefied gas emergency shut-off valve.

[0018] Figure 4 This is an exploded view of a liquefied gas emergency shut-off valve.

[0019] Figure numerals: air pipe 11, baffle 12, valve plate 13, valve stem 14, valve body 2, push head 31, mounting frame shell 32, shell body 321, middle intermediate ring 322, connecting hole 323, welding column 324, driving mechanism 33, permanent magnet 331, electromagnet 333, connecting head 334, connecting frame 335, telescopic rod 336, sealing assembly 34, head to be opened and closed 35, sealing ring 36. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figures 2 to 4As shown, the utility model proposes a liquefied gas emergency shut-off valve, including: a valve body 2 and a blocking mechanism; the valve body 2 is respectively provided with a first through hole and a second through hole at both ends, the first through hole is connected to the second through hole, a baffle 12 is provided between the first through hole and the second through hole, the baffle 12 separates the first through hole and the second through hole, a hole to be opened and closed is provided on the baffle 12, and the hole to be opened and closed is used to connect the first through hole and the second through hole; the blocking mechanism includes: a pressing head 31, a mounting frame shell 32, a driving mechanism 33 and a blocking assembly 34, the mounting frame shell 32 is provided with a driving mechanism 33, the top of the mounting frame shell 32 is provided with a connecting end, and the pressing head 31 is provided with a driving mechanism 33. A connecting rod extends downward from the center of the movable head 31, and the connecting rod passes through the connecting end to be connected to the driving mechanism 33. A sealing component 34 is provided at the output end of the driving mechanism 33. The sealing component 34 is used to seal the hole to be opened and closed, and a spring is installed between the sealing component 34 and the inner bottom wall of the valve body 2; the hole to be opened and closed of the baffle 12 is threadedly connected with a head to be opened and closed 35 to be opened and closed, and the head to be opened and closed 35 to be opened and closed is a cylindrical structure, and the inner hole of the head to be opened and closed 35 to be opened and closed is for the output end of the driving mechanism 33 to pass through; the sealing component 34 is detachably installed at the output end of the driving mechanism 33, and the sealing component 34 is located below the head to be opened and closed 35 to be opened and closed, and the sealing component 34 cannot pass through the inner hole of the head to be opened and closed 35 to be opened and closed.

[0022] The driving mechanism 33 includes: a permanent magnet 331, an electromagnet 333, a connector 334, a connecting frame 335 and a telescopic rod 336. The connecting head 334 is provided in the mounting frame housing 32. The top of the connecting head 334 is used to install the push head 31. The telescopic rod 336 is installed at the bottom of the connecting head 334. The telescopic rod 336 passes through the connecting frame 335. The connecting frame 335 is fixed in the mounting frame housing 32. The permanent magnet 331 is fixed on the telescopic rod 336; an electromagnet 333 is installed below the permanent magnet 331. The electromagnet 333 is used to connect to the external AC power. The telescopic rod 336 passes through the mounting frame housing 32 and is connected to the blocking head. The bottom end of the telescopic rod 336 is the output end of the driving mechanism 33.

[0023] The plugging assembly 34 includes a plugging head, which is threadedly connected to the telescopic rod 336 and is used to plug the inner hole of the head to be opened and closed 35. The plugging head has the same function as the valve plate 13 in the prior art.

[0024] The mounting frame housing 32 includes: a housing body 321 and a middle connecting ring 322. A connecting frame 335, an electromagnet 333 and a permanent magnet 331 are installed in the housing body 321. A push head 31 is installed on the top of the housing body 321. A middle connecting ring 322 is installed on the bottom of the housing body 321. The middle connecting ring 322 is used to connect the housing body 321 with the valve body 2. The middle connecting ring 322 does not block the telescopic rod 336 from moving.

[0025] The side wall of the shell body 321 is provided with a connection hole 323, and the top of the middle connector 334 is provided with a mounting groove, the connection hole 323 is for the welding column 324 to extend into, the mounting groove is for the welding column 324 to extend into, and the welding column 324 is welded to the shell body 321. The welding column 324 is a T-shaped structure, and the large end of the welding column 324 is located in the middle connector 334. When the large end of the welding column 324 is hot-melted in the middle connector 334, the welding column 324 cannot be separated from the shell body 321. At the same time, the welding column 324 has the effect of blocking the middle indirect ring 322 from being separated in the direction parallel to the telescopic rod 336, thereby improving the reliability of the welding column 324 connecting the middle connector 334 with the shell body 321.

[0026] A sealing layer (not shown in the figure) is provided between the bottom of the shell body 321 and the middle connector 334. The sealing layer is a cover-like structure (this structural shape is designed so that the middle connector 334 seals the inside of the shell body 321 to prevent gas from entering and igniting the gas, thereby avoiding safety accidents). The sealing layer is for the telescopic rod 336 to pass through. A sealing ring 36 is fixed to the bottom of the middle connector 334. The sealing ring 36 seals the gap between the telescopic rod 336 and the middle connector 334. The sealing ring 36 is for the telescopic rod 336 to pass through, and the sealing ring 36 does not block the movement of the telescopic rod 336.

[0027] The intermediate connector 334 is threadedly connected to the valve body 2 .

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. Liquefied gas emergency shut-off valve, characterized in that: include: A valve body (2) and a blocking mechanism; The valve body (2) has a first through hole and a second through hole at both ends, the first through hole is connected to the second through hole, a baffle (12) is provided between the first through hole and the second through hole, the baffle (12) separates the first through hole and the second through hole, and a hole to be opened and closed is provided on the baffle (12), the hole to be opened and closed is used to connect the first through hole and the second through hole; The blocking mechanism comprises: a push head (31), a mounting frame shell (32), a driving mechanism (33) and a blocking component (34); the mounting frame shell (32) is provided with a driving mechanism (33); a connecting end is provided at the top of the mounting frame shell (32); a connecting rod extends downward from the center of the push head (31); the connecting rod passes through the connecting end and is connected to the driving mechanism (33); a blocking component (34) is provided at the output end of the driving mechanism (33); the blocking component (34) is used to block the hole to be opened or closed; a spring is installed between the blocking component (34) and the inner bottom wall of the valve body (2); The opening and closing hole of the baffle (12) is internally threadedly connected to a head (35) to be opened and closed. The head (35) to be opened and closed is a cylindrical structure, and the inner hole of the head (35) to be opened and closed is for the output end of the driving mechanism (33) to pass through. The blocking component (34) is detachably mounted on the output end of the driving mechanism (33), and the blocking component (34) is located below the head to be opened and closed (35), and the blocking component (34) cannot pass through the inner hole of the head to be opened and closed (35).

2. The liquefied gas emergency shut-off valve according to claim 1, characterized in that: The driving mechanism (33) comprises: a permanent magnet (331), an electromagnet (333), a connector (334), a connecting frame (335) and a telescopic rod (336). The mounting frame housing (32) is provided with a connector (334). The top of the connector (334) is used to mount the push head (31). The bottom of the connector (334) is provided with a telescopic rod (336). The telescopic rod (336) passes through the connecting frame (335). The connecting frame (335) is fixed in the mounting frame housing (32). The permanent magnet (331) is fixed on the telescopic rod (336). An electromagnet (333) is installed below the permanent magnet (331). The electromagnet (333) is used to connect to external mains electricity. The telescopic rod (336) passes through the mounting frame housing (32) and is connected to the plugging head. The bottom end of the telescopic rod (336) is the output end of the driving mechanism (33).

3. The liquefied gas emergency shut-off valve according to claim 2, characterized in that: The plugging assembly (34) comprises a plugging head, which is threadedly connected to the telescopic rod (336), and is used to plug the inner hole of the head to be opened and closed (35).

4. The liquefied gas emergency shut-off valve according to claim 3, characterized in that: The mounting frame shell (32) comprises: a shell body (321) and an intermediate indirect ring (322); a connecting frame (335), an electromagnet (333) and a permanent magnet (331) are installed in the shell body (321); a pressing head (31) is installed on the top of the shell body (321); and an intermediate indirect ring (322) is installed on the bottom of the shell body (321); the intermediate indirect ring (322) is used to connect the shell body (321) with the valve body (2).

5. The liquefied gas emergency shut-off valve according to claim 4, characterized in that: A connecting hole (323) is provided on the side wall of the shell body (321), and a mounting groove is provided on the top of the middle connecting head (334). The connecting hole (323) is for the welding column (324) to extend into, and the mounting groove is for the welding column (324) to extend into. The welding column (324) is welded to the shell body (321).

6. The liquefied gas emergency shut-off valve according to claim 5, characterized in that: A sealing layer is provided between the bottom of the shell body (321) and the middle connecting head (334). The sealing layer is a cover-shaped structure. The sealing layer allows the telescopic rod (336) to pass through. A sealing ring (36) is fixed at the bottom of the middle connecting head (334). The sealing ring (36) seals the gap between the telescopic rod (336) and the middle connecting head (334). The sealing ring (36) allows the telescopic rod (336) to pass through. The sealing ring (36) does not block the movement of the telescopic rod (336).

7. The liquefied gas emergency shut-off valve according to claim 6, characterized in that: The intermediate connector (334) is threadedly connected to the valve body (2).

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