Ultralow-temperature forged steel stop valve

Abstract

The invention discloses an ultralow-temperature forged steel stop valve which comprises a stop valve body, a valve rod shell, a valve rod, an expansion mechanism, a limiting mechanism, a water conveying mechanism, a frame, a reciprocating lead screw, a moving block, an L-shaped supporting rod, an arc-shaped limiting plate and a rotating head. The top of the valve rod is connected with an expansion mechanism, the bottom of the valve rod is connected with a valve clack, the valve clack is in sealed contact connection with a channel in the stop valve body, a limiting mechanism is arranged outside a valve rod shell, and a water conveying mechanism is arranged on the side wall of the stop valve body. And the limiting mechanism comprises a frame, a reciprocating lead screw, a moving block, an L-shaped supporting rod, an arc-shaped limiting plate and a rotating head, a valve rod can be limited and fixed, the situation that the valve rod rotates due to accidental touch of an operator is avoided, meanwhile, the interior of a valve can be quickly unfrozen, and then the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of stop valves, in particular to the technical field of ultra-low temperature forged steel stop valves. Background Art

[0002] Ultra-low temperature forged steel stop valve is a valve that combines the high strength of forged steel and the sealing performance of the stop valve. It is also a valve specially designed for harsh working conditions. It usually works in a low temperature environment. Compared with normal temperature valves, the valve packing part is usually designed to be higher, and the valve stem is also extended. In order to prevent deep-cold deformation, the main parts of the ultra-low temperature stop valve are all cryogenically treated, which can ensure that the valve can remain flexible in switching under ultra-low temperature conditions.

[0003] However, traditional low-temperature stop valves may also have the problem of the valve neck being too short. A valve neck that is too short will reduce the elasticity of the packing inside the valve neck, reduce the anti-leakage performance of the packing, and cause ice to form at the joint between the packing and the valve stem, affecting the operation of the valve stem and also causing damage to the packing.

[0004] In order to solve the problems raised in the background technology, for example, application number CN201821528588.8 discloses a low-temperature stop valve, including a valve body, a passage is arranged inside the valve body, a valve seat is arranged inside the passage, a valve flap is arranged on the upper surface of the valve seat, a valve stem is arranged on the valve flap, and the valve flap is fixedly connected to the valve stem through a valve flap nut, a valve cover is arranged on the upper surface of the valve body, and the valve cover is fixedly connected to the valve body through bolts. The problem raised in the background technology can be effectively solved by setting an additional valve neck between the valve cover and the pressure cover. Compared with the traditional valve neck, the extended valve neck after lengthening can effectively prevent the elasticity of the packing from decreasing, so that the anti-leakage performance of the packing is improved, and the problem of ice forming at the matching position of the packing and the valve stem, which affects the operation of the valve stem, is avoided, and damage to the packing is also avoided. However, the structure still has the following defects: During use of the above structure, the low-temperature stop valve has a large opening and closing torque and is laborious to open and close, which results in a long opening and closing time and is inconvenient to use.

[0005] In order to solve the problems raised in the above-mentioned technology, for example, application number CN202322321057.9 discloses a low-temperature stop valve, including a stop valve body and an extension mechanism, wherein the extension mechanism includes a support hole, a limit hole, a support rod, a limit block, a limit rod and a handle, the top of the stop valve body is fixedly connected to a valve stem housing, the inner wall of the valve stem housing is rotatably connected to the stop valve stem, the top of the stop valve stem is fixedly connected to a connecting block, and the outer surface of the connecting block is fixedly connected to a hand wheel. During use, the handle The support rod and the support hole are slidably connected with the connecting block, so that the handle can be pulled out from the handwheel. The limit block at one end of the support rod prevents the support rod from being completely pulled out of the support hole. In this way, the handle can be installed on the handwheel, and the limit hole and the limit rod prevent the handle from rotating after being pulled out. After the handles on both sides are pulled out, the force arm becomes longer, so it is easier to save effort when the valve stem is turned. When it is not necessary to turn, the handle is put into the handwheel to save space, achieving the effect of saving effort and being more convenient to use when turning the valve. However, this structure still has the following defects: 1. Although the above structure increases the force arm, making the valve stem more labor-saving when rotating, the structure cannot limit and lock the valve stem after rotation, which makes it easy for the handwheel to rotate after being accidentally touched, thereby driving the valve stem to rotate, thus affecting the use of the valve; 2. Although the above structure is provided with an input mechanism to defrost the inside of the valve, the thawing speed is relatively slow and the working efficiency is low only by hot water, which affects the use process of the valve. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art and to propose an ultra-low temperature forged steel stop valve, which can limit and fix the valve stem to prevent the operator from accidentally touching it and causing the valve stem to rotate. At the same time, it can quickly thaw the interior of the valve, thereby improving processing efficiency.

[0007] To achieve the above-mentioned purpose, the present invention proposes an ultra-low temperature forged steel stop valve, comprising a stop valve body, a valve stem housing, a valve stem, an expansion mechanism, a limiting mechanism, a water delivery mechanism, a frame, a reciprocating screw rod, a moving block, an L-shaped support rod, an arc-shaped limiting plate, and a rotating head. The stop valve body is fixedly connected with a valve stem housing on the top, a valve stem is rotatably arranged inside the valve stem housing, the top of the valve stem is connected with an expansion mechanism, the bottom of the valve stem is connected with a valve flap, the valve flap is sealed and contacted with a channel inside the stop valve body, a limiting mechanism is arranged outside the valve stem housing, and a water delivery mechanism is arranged on the side wall of the stop valve body. The limiting mechanism includes a frame, a reciprocating screw, a moving block, an L-shaped support rod, an arc-shaped limiting plate and a rotating head. The frame is a square structure and is welded to the outer wall of the valve stem housing. The valve stem housing is located in the middle of the frame. A reciprocating screw is rotatably arranged on the inner side surface of the frame. Two moving blocks are threadedly arranged on the outer wall of the reciprocating screw. An L-shaped support rod is arranged on one side of the moving block. The L-shaped support rod is symmetrically arranged. One end of the L-shaped support rod passes through the interior of the valve stem housing and is provided with an arc-shaped limiting plate adapted to the outer diameter of the valve stem. One end of the reciprocating screw passes through the outer side of the frame and is rotatably connected to a rotating head.

[0008] Preferably, a non-slip rubber pad is provided on one side of the arc-shaped limit plate located on the valve stem.

[0009] Preferably, the outer wall of the valve stem housing is symmetrically provided with sliding holes adapted to the outer diameter of the L-shaped support rod, and one end of the L-shaped support rod can slide back and forth in the sliding hole.

[0010] Preferably, the expansion mechanism includes four electric telescopic rods and arc-shaped valve covers, the four electric telescopic rods are arranged in a circular shape and at equal intervals on the outer wall of the top of the valve stem, the end of each electric telescopic rod is connected to a arc-shaped valve cover, the four arc-shaped valve covers are enclosed to form a hand wheel, and the four arc-shaped valve covers can expand or contract with each other.

[0011] Preferably, the water delivery mechanism includes a support plate, a fixing rod, a heat storage tank, a water inlet, a sealing plug and a water outlet pipe, the support plate is mounted on the outer side wall of the stop valve body through the fixing rod, a heat storage tank is arranged above the support plate, a water inlet is arranged above the heat storage tank, a sealing plug is provided on the water inlet, a side wall of the heat storage tank is connected to a water outlet pipe, one end of the water outlet pipe passes through the interior of the stop valve body, and the water outlet pipe is arranged to be slightly inclined downward.

[0012] Preferably, a filter screen is embedded and installed inside the hot water storage tank, and the filter screen is located at the inner upper part of the hot water storage tank.

[0013] Preferably, the outer wall of the water outlet pipe is equipped with an automatic sensing switch, which is used to automatically control the water flow.

[0014] Preferably, a hot air blower is further provided above the support plate, the hot air blower is electrically connected to an external control power supply, an air outlet of the hot air blower is connected to a hot air duct, one end of the hot air duct passes through the interior of the stop valve body.

[0015] Beneficial effects of the present invention: 1. The present invention can limit and fix the valve stem through the cooperation of the limit mechanism and the sliding hole. When the operator is not using the stop valve body, by rotating the rotating head, the rotating head drives the reciprocating screw rod to rotate, thereby driving the two moving blocks to approach each other. In the process of approaching, the moving block drives the L-shaped support rod to move in the sliding hole, thereby driving the two arc-shaped limit plates to approach the outer wall of the valve stem until the arc-shaped limit plates are attached to and clamped with the outer wall of the valve stem, thereby limiting and fixing the valve stem. After the valve stem is fixed, it is not easy to rotate even if the hand wheel is accidentally touched, thereby avoiding affecting the subsequent use of the stop valve body. When the stop valve body needs to be used, the rotating head is rotated in the opposite direction, and the rotating head drives the reciprocating screw rod to reverse, thereby driving the two moving blocks to move away from each other, and at the same time driving the arc-shaped limit plates to move away from the outer wall of the valve stem, thereby facilitating the rotation of the hand wheel, thereby solving the problem that the rotated valve stem cannot be limited and locked, thereby causing the hand wheel to rotate easily after being accidentally touched, thereby driving the valve stem to rotate, thereby affecting the use of the valve; 2. The present invention can quickly defrost the interior of the valve through the cooperation of the water delivery mechanism and the hot air blower. When the valve is in use, it may freeze inside due to the influence of too low temperature and the fact that the valve is often used in a humid environment. Therefore, hot water is first poured into the interior of the heat storage tank, so that the hot water passes through the interior of the heat storage tank and flows into the water outlet pipe, and then flows from the water outlet pipe into the interior of the stop valve body. At the same time, the hot air blower is started by an external power supply, and the hot air blower supplies air to the interior of the stop valve body through the hot air duct, so that the hot water and the hot air can defrost the interior of the stop valve body at the same time, greatly accelerating the thawing speed, thereby improving the use effect of the valve, and solving the problem of slow thawing speed and low working efficiency caused by only using hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the ultra-low temperature forged steel stop valve of the present invention; Figure 2 It is a schematic diagram of the limit mechanism of the ultra-low temperature forged steel stop valve of the present invention; Figure 3 Schematic diagram of the sliding hole of the ultra-low temperature forged steel stop valve of the present invention; Figure 4 Schematic diagram of the expansion mechanism of the ultra-low temperature forged steel stop valve of the present invention; Figure 5 It is a schematic diagram of the water delivery mechanism of the ultra-low temperature forged steel stop valve of the present invention; In the figure: 1-stop valve body, 2-valve stem housing, 21-sliding hole, 3-valve stem, 4-expansion mechanism, 41-electric telescopic rod, 42-arc valve cover, 5-limiting mechanism, 51-frame, 52-reciprocating screw rod, 53-moving block, 54-L-type support rod, 55-arc-shaped limiting plate, 555-anti-slip rubber pad, 56-rotating head, 6-water delivery mechanism, 61-support plate, 611-hot air blower, 6111-hot air duct, 62-fixing rod, 63-heat storage tank, 633-filter screen, 64-water inlet, 65-sealing plug, 66-water outlet pipe, 666-automatic induction switch. DETAILED DESCRIPTION

[0017] See also Figure 1 and Figure 2 The ultra-low temperature forged steel stop valve provided in this embodiment includes a stop valve body 1, a valve stem housing 2, a valve stem 3, an expansion mechanism 4, a limiting mechanism 5, a water delivery mechanism 6, a frame 51, a reciprocating screw rod 52, a moving block 53, an L-shaped support rod 54, an arc-shaped limiting plate 55, and a rotating head 56. The valve stem housing 2 is fixedly connected to the top of the stop valve body 1, and the valve stem 3 is rotatably arranged inside the valve stem housing 2. The top of the valve stem 3 is connected to the expansion mechanism 4, and the bottom of the valve stem 3 is connected to a valve disc, and the valve disc is sealed and contacted with the channel inside the stop valve body 1. The limit mechanism 5 is arranged outside the valve stem housing 2, and the side wall of the stop valve body 1 is arranged with a water delivery mechanism 6. The limit mechanism 5 includes a frame The frame 51 comprises a reciprocating screw 52, ​​a moving block 53, an L-shaped support rod 54, an arc-shaped limit plate 55 and a rotating head 56. The frame 51 is of a square structure and is welded to the outer wall of the valve stem housing 2. The valve stem housing 2 is located in the middle of the frame 51. The inner side surface of the frame 51 is rotatably provided with a reciprocating screw 52. The outer wall of the reciprocating screw 52 is threadedly provided with two moving blocks 53. One side of the moving block 53 is provided with an L-shaped support rod 54. The L-shaped support rod 54 is symmetrically arranged. One end of the L-shaped support rod 54 passes through the interior of the valve stem housing 2 and is provided with an arc-shaped limit plate 55 matched with the outer diameter of the valve stem 3. One end of the reciprocating screw 52 passes through the outer side of the frame 51 and is rotatably connected with a rotating head 56.

[0018] The working principle and beneficial effects of the above scheme are as follows: by rotating the rotating head 56, the rotating head 56 drives the reciprocating screw rod 52 to rotate, thereby driving the two moving blocks 53 to approach each other. In the process of approaching, the moving block 53 drives the L-shaped support rod 54 to move in the sliding hole 21, thereby driving the two arc-shaped limit plates 55 to approach the outer wall of the valve stem 3, until the arc-shaped limit plates 55 are attached to and clamped against the outer wall of the valve stem 3, thereby limiting and fixing the valve stem 3. After the valve stem 3 is fixed, it is not easy to rotate even if the hand wheel is accidentally touched.

[0019] In this embodiment, see Figure 2 The arc-shaped limiting plate 55 is provided with an anti-slip rubber pad 555 on one side of the valve stem 3 .

[0020] The working principle and beneficial effects of the above scheme: by providing the anti-skid rubber pad 555, the friction between the arc-shaped limit plate 55 and the valve stem 3 can be increased, thereby further playing an anti-skid role and avoiding the occurrence of pinch marks on the outer wall of the valve stem 3.

[0021] In this embodiment, see Figure 3 The outer wall of the valve stem housing 2 is symmetrically provided with a sliding hole 21 adapted to the outer diameter of the L-shaped support rod 54 , and one end of the L-shaped support rod 54 can slide back and forth in the sliding hole 21 .

[0022] The working principle and beneficial effects of the above solution are as follows: by providing the sliding hole 21 , the L-shaped support rod 54 can move in the sliding hole 21 , thereby driving the arc-shaped limit plate 55 to move inside the valve stem housing 2 .

[0023] In this embodiment, see Figure 4 The expansion mechanism 4 includes four electric telescopic rods 41 and an arc-shaped valve cover 42. The four electric telescopic rods 41 are arranged in a ring shape and at equal intervals on the outer wall of the top of the valve stem 3. The end of each electric telescopic rod 41 is connected to an arc-shaped valve cover 42. The four arc-shaped valve covers 42 are enclosed to form a hand wheel, and the four arc-shaped valve covers 42 can expand or contract with each other.

[0024] The working principle and beneficial effects of the above scheme are as follows: the electric telescopic rod 41 is controlled to extend forward by an external power supply, thereby driving the arc-shaped valve cover 42 to expand outward, thereby expanding the force arm, making the valve stem 3 more labor-saving during the rotation process.

[0025] In this embodiment, see Figure 1 and Figure 5 The water delivery mechanism 6 includes a support plate 61, a fixing rod 62, a hot water storage tank 63, a water inlet 64, a sealing plug 65 and a water outlet pipe 66. The support plate 61 is installed on the outer wall of the stop valve body 1 through the fixing rod 62. The hot water storage tank 63 is arranged above the support plate 61. The hot water storage tank 63 is arranged above the water inlet 64. The water inlet 64 is equipped with a sealing plug 65. The side wall of the hot water storage tank 63 is connected with a water outlet pipe 66. One end of the water outlet pipe 66 passes through the interior of the stop valve body 1, and the water outlet pipe 66 is arranged to be slightly inclined downward.

[0026] The working principle and beneficial effects of the above scheme are as follows: hot water is poured into the interior of the hot water storage tank 63, so that the hot water passes through the interior of the hot water storage tank 63 and flows into the water outlet pipe 66, and then flows from the water outlet pipe 66 into the interior of the stop valve body 1, thereby thawing the interior of the stop valve body 1.

[0027] In this embodiment, see Figure 5 A filter screen 633 is embedded in the interior of the hot water storage tank 63 , and the filter screen 633 is located at the inner upper part of the hot water storage tank 63 .

[0028] The working principle and beneficial effects of the above solution: by providing the filter 633, impurities can be prevented from entering the interior of the stop valve body 1 during the pouring of hot water, thereby ensuring that the stop valve body 1 is not easily damaged during use.

[0029] In this embodiment, see Figure 5 The outer wall of the water outlet pipe 66 is equipped with an automatic sensing switch 666, and the automatic sensing switch 666 is used to automatically control the water flow.

[0030] The working principle and beneficial effects of the above scheme: The automatic sensing switch 666 in the present application is similar to the principle of an automatic water-opening and water-closing butterfly valve. It senses the change in water flow pressure to automatically control the switching of the water flow. When the water flow pressure reaches the set value, the water valve is automatically opened. When the water flow pressure drops to a certain level, the water valve is automatically closed, thereby achieving the purpose of automatically controlling the water flow and preventing hot water from continuously flowing into the interior of the stop valve body 1, causing a waste of water resources.

[0031] In this embodiment, see Figure 1 A hot air blower 611 is also provided above the support plate 61. The hot air blower 611 is electrically connected to an external control power supply. The air outlet of the hot air blower 611 is connected to a hot air duct 6111. One end of the hot air duct 6111 passes through the interior of the stop valve body 1.

[0032] The working principle and beneficial effects of the above scheme are as follows: the hot air blower 611 is started by an external power supply, and the hot air blower 611 supplies air to the inside of the stop valve body 1 through the hot air duct 6111, so that hot water and hot air can defrost the inside of the stop valve body 1 at the same time, greatly accelerating the thawing speed.

[0033] Working process of the present invention: When the stop valve body 1 is in operation, the operator can rotate the rotating head 56, which drives the reciprocating screw rod 52 to rotate, thereby driving the two moving blocks 53 to move closer to each other. In the process of approaching, the moving block 53 drives the L-shaped support rod 54 to move in the sliding hole 21, thereby driving the two arc-shaped limit plates 55 to move closer to the outer wall of the valve stem 3, until the arc-shaped limit plates 55 are attached to and clamped against the outer wall of the valve stem 3, thereby limiting and fixing the valve stem 3. After the valve stem 3 is fixed, it is not easy to rotate even if the hand wheel is accidentally touched, thereby avoiding affecting the subsequent use of the stop valve body 1. When the stop valve body 1 needs to be used, the rotating head 56 is rotated in the opposite direction, and the rotating head 56 drives the reciprocating screw rod 52 to reverse, thereby driving the two moving blocks 53 away from each other, and at the same time driving the arc-shaped limit plates 55 away from the outer wall of the valve stem 3, thereby facilitating the rotation of the hand wheel.

[0034] When the valve is in use, due to the influence of low temperature and the fact that the valve is often used in a humid environment, it may cause internal ice. Therefore, hot water is first poured into the hot water storage tank 63, so that the hot water passes through the hot water storage tank 63 and flows into the water outlet pipe 66, and then flows from the water outlet pipe 66 into the inside of the stop valve body 1. At the same time, the hot air blower 611 is started by an external power supply, and the hot air blower 611 supplies air to the inside of the stop valve body 1 through the hot air duct 6111, so that the hot water and hot air can defrost the inside of the stop valve body 1 at the same time, greatly accelerating the thawing speed, thereby improving the use effect of the valve.

[0035] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and wiring layout in detail.

[0036] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. Ultra-low temperature forged steel stop valve, characterized by: The invention comprises a stop valve body (1), a valve stem housing (2), a valve stem (3), an expansion mechanism (4), a limiting mechanism (5), a water delivery mechanism (6), a frame (51), a reciprocating screw rod (52), a moving block (53), an L-shaped support rod (54), an arc-shaped limiting plate (55), and a rotating head (56), wherein the valve stem housing (2) is fixedly connected to the top of the stop valve body (1), a valve stem (3) is rotatably arranged inside the valve stem housing (2), the top of the valve stem (3) is connected to the expansion mechanism (4), the bottom of the valve stem (3) is connected to a valve flap, and the valve flap is in sealing contact with a channel inside the stop valve body (1), the outside of the valve stem housing (2) is provided with a limiting mechanism (5), the side wall of the stop valve body (1) is provided with a water delivery mechanism (6), the limiting mechanism (5) comprises a frame (51), a reciprocating screw rod (52), a moving block (53), an L-shaped support rod (54), an arc-shaped limiting plate (55), and a rotating head (56), wherein the valve stem housing (2) is fixedly connected to the top of the stop valve body (1), a valve stem (3) is rotatably arranged inside the valve stem housing (2), the top of the valve stem (3) is connected to the expansion mechanism (4), the bottom of the valve stem (3) is connected to a valve flap, and the valve flap is in sealing contact with a channel inside the stop valve body (1), the limit mechanism (5) is arranged outside the valve stem housing (2), the side wall of the stop valve body (1) is provided with a water delivery mechanism (6), the limit mechanism (5) comprises a frame (51), a reciprocating screw rod (52), a moving block (53), an L-shaped support rod (54), an arc-shaped limiting plate (55), and a rotating head (56), wherein the valve stem housing (2) is fixedly connected to the top of the stop valve body (1), the valve stem (3) is A screw rod (52), a moving block (53), an L-shaped support rod (54), an arc-shaped limit plate (55) and a rotating head (56); the frame (51) is of a square structure and is welded to the outer wall of the valve stem housing (2); the valve stem housing (2) is located in the middle of the frame (51); a reciprocating screw rod (52) is rotatably arranged on the inner side surface of the frame (51); two moving blocks (53) are threadedly arranged on the outer wall of the reciprocating screw rod (52); one side of each moving block (53) is provided with an L-shaped support rod (54); the L-shaped support rod (54) is symmetrically arranged; one end of each L-shaped support rod (54) passes through the inside of the valve stem housing (2); an arc-shaped limit plate (55) matching the outer diameter of the valve stem (3) is provided; one end of the reciprocating screw rod (52) passes through the outer side of the frame (51) and is rotatably connected to the rotating head (56).

2. The ultra-low temperature forged steel stop valve according to claim 1, characterized in that: A non-slip rubber pad (555) is provided on one side of the arc-shaped limiting plate (55) located on the valve stem (3).

3. The ultra-low temperature forged steel stop valve according to claim 1, characterized in that: The outer wall of the valve stem housing (2) is symmetrically provided with sliding holes (21) adapted to the outer diameter of the L-shaped support rod (54), and one end of the L-shaped support rod (54) can slide back and forth in the sliding hole (21).

4. The ultra-low temperature forged steel stop valve according to claim 1, characterized in that: The expansion mechanism (4) comprises four electric telescopic rods (41) and arc-shaped valve covers (42); the four electric telescopic rods (41) are arranged in a circular shape at equal intervals on the outer wall of the top of the valve stem (3); the end of each electric telescopic rod (41) is connected to the arc-shaped valve cover (42); the four arc-shaped valve covers (42) enclose a hand wheel, and the four arc-shaped valve covers (42) can expand or contract with each other.

5. The ultra-low temperature forged steel stop valve according to claim 1, characterized in that: The water delivery mechanism (6) comprises a support plate (61), a fixing rod (62), a hot water storage tank (63), a water inlet (64), a sealing plug (65) and a water outlet pipe (66); the support plate (61) is mounted on the outer wall of the stop valve body (1) via the fixing rod (62); a hot water storage tank (63) is arranged above the support plate (61); a water inlet (64) is arranged above the hot water storage tank (63); a sealing plug (65) is provided on the water inlet (64); a side wall of the hot water storage tank (63) is connected to a water outlet pipe (66); one end of the water outlet pipe (66) passes through the interior of the stop valve body (1), and the water outlet pipe (66) is arranged to be slightly inclined downward.

6. The ultra-low temperature forged steel stop valve according to claim 5, characterized in that: A filter screen (633) is embedded and installed inside the hot water storage tank (63), and the filter screen (633) is located at the upper inner part of the hot water storage tank (63).

7. The ultra-low temperature forged steel stop valve according to claim 5, characterized in that: The outer wall of the water outlet pipe (66) is equipped with an automatic sensing switch (666), and the automatic sensing switch (666) is used for the purpose of automatically controlling the water flow.

8. The ultra-low temperature forged steel stop valve according to claim 5, characterized in that: A hot air blower (611) is also provided above the support plate (61), the hot air blower (611) being electrically connected to an external control power supply, an air outlet of the hot air blower (611) being connected to a hot air duct (6111), one end of the hot air duct (6111) penetrating into the interior of the stop valve body (1).

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