Ultralow-temperature fireproof anti-static ball valve

Abstract

The invention discloses an ultralow-temperature fireproof anti-static ball valve which comprises a valve body, a medium inflow pipeline, a medium outflow pipeline, a spherical middle cavity, a spherical valve element, a valve rod, a first sealing groove, a second sealing groove, a sealing assembly, a fireproof assembly, a static guiding mechanism, a grounding guiding wire and a conductive block. The other end of the valve body is provided with a medium flowing-in pipeline used for flowing out of a medium, a spherical middle cavity is formed in the center of the interior of the valve body, the medium flowing-in pipeline and the medium flowing-out pipeline are communicated with each other through the spherical middle cavity, a spherical valve element is arranged in the spherical middle cavity, and the top of the spherical valve element is fixedly connected with a valve rod. The top of the valve rod penetrates through the outside of the valve body to facilitate opening and closing operation, the bottom of the valve rod is connected with the spherical valve element in the spherical middle cavity, the fireproof and anti-static effects can be achieved, normal use of the valve is guaranteed, and the service life of the structure is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, in particular to the technical field of ultra-low temperature fireproof and anti-static ball valves. Background Art

[0002] Valves are control components in fluid delivery systems and have functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion or overflow pressure relief. Ultra-low temperature ball valves are one type of valves. Existing ultra-low temperature ball valves are unidirectional and prone to blockage, making them inconvenient to use.

[0003] In order to solve the problems raised in the background technology, for example, application number CN201520465194.2 discloses an ultra-low temperature ball valve, including a valve cover, a valve body, and a valve ball. A first valve seat is provided between one side of the upper end of the valve cover and one side of the upper end of the valve body, a first disc spring is provided between the valve cover and the first valve seat, a first valve seat sealing ring is provided between the valve ball and the first valve seat, a first lip sealing ring is provided between the valve body and the first valve seat, a second valve seat is provided between the other side of the upper end of the valve cover and the other side of the upper end of the valve body, a second valve seat sealing ring is provided between the valve ball and the second valve seat, a third valve seat sealing ring and a valve seat pressure ring are provided between the valve cover and the second valve seat, and a second disc spring is provided between the valve seat pressure ring and the valve cover. When blockage is about to occur, the first disc spring and the second disc spring respectively move the first valve seat and the second valve seat downward, thereby forming a channel, so that blockage will not occur, and it is convenient to use. However, the structure still has the following defects: Although the first disc spring and the second disc spring in the above-mentioned ball valve respectively move the first valve seat and the second valve seat downward to form a channel to avoid blockage, this structure usually encounters an ultra-low temperature working condition of -196°C when used in an ultra-low temperature environment. The low-temperature isolation effect of this structure is poor, which makes it difficult to manually operate the handwheel.

[0004] In order to solve the problems raised in the above-mentioned technology, for example, application number CN201920877821.1 discloses an ultra-low temperature ball valve, including a valve body, a valve seat, a ball, a valve stem, a valve cover, a hand wheel, a seal and a mounting part, wherein a hard seal is adopted between the valve seat and the ball; the valve stem is connected to the hand wheel through an extension rod, the upper end of the valve stem and the lower end of the extension rod are connected by a coupling, an extension rod sleeve is arranged between the valve body and the hand wheel mounting frame, an annular cavity is provided between the inner circular wall of the extension rod sleeve and the outer circular surface of the extension rod, and the annular cavity is provided between the inner circular wall of the extension rod sleeve and the outer circular surface of the extension rod. The cavity is divided into at least two sections along the axis of the valve stem; the lower annular cavity is close to the valve body, and the extended rod sleeve outside the lower annular cavity is provided with a plurality of air-cooling windows in the circumferential direction; the upper side of the lower annular cavity is connected to the upper annular cavity, and an insulation sleeve is arranged in the upper annular cavity. The insulation sleeve is formed by pressing with insulation material, and an air-cooling device and an insulation sleeve heat-insulating device are arranged between the valve body and the hand wheel to effectively isolate the low temperature of the medium from being transmitted to the hand wheel. The heat-insulating effect is good, and the manual operation of the hand wheel is convenient and safe. However, the structure still has the following defects: 1. The above ball valve lacks an anti-static structure, which causes some media to generate static electricity by friction with the ball during rapid flow in the valve body. If the static electricity is not conducted out of the valve body, explosion and fire are very likely to occur, thus increasing the danger; 2. The above-mentioned ball valve lacks a fireproof structure, which means that once a fire occurs, the seal inside the valve body is easily melted, thus affecting the use of the valve. At the same time, it cannot stop the fire, causing the fire to spread further along the pipeline. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose an ultra-low temperature fireproof and anti-static ball valve, which can achieve fireproof and anti-static effects, thereby ensuring the normal use of the valve and extending the service life of the structure.

[0006] To achieve the above-mentioned objectives, the present invention proposes an ultra-low temperature fireproof and anti-static ball valve, comprising a valve body, a medium inflow pipe, a medium outflow pipe, a spherical middle cavity, a spherical valve core, a valve stem, a first sealing groove, a second sealing groove, a sealing assembly, a fireproof assembly, an electrostatic guide mechanism, a grounding guide line, and a conductive block. A medium inflow pipe for medium inflow is provided at one end of the valve body, and a medium outflow pipe for medium outflow is provided at the other end of the valve body. A spherical middle cavity is provided at the inner center of the valve body, and the medium inflow pipe and the medium outflow pipe are connected to each other through the spherical middle cavity. A spherical valve core is provided inside the spherical middle cavity, and a valve stem is fixedly connected to the top of the spherical valve core, and the top of the valve stem passes through the outside of the valve body to facilitate opening and closing. Operation, the bottom of the valve stem is connected to the spherical valve core in the spherical middle cavity, so that the spherical valve core can rotate freely in the spherical middle cavity, a first sealing groove is arranged inside the spherical middle cavity of the valve body near the medium inlet pipe, and a second sealing groove is arranged inside the spherical middle cavity of the valve body near the medium outlet pipe, sealing components are arranged in the first sealing groove and the second sealing groove, fire prevention components are arranged above the medium inlet pipe and the medium outlet pipe, an electrostatic guide mechanism is installed below the valve body, the electrostatic guide mechanism includes a grounding guide wire and a conductive block, one end of the grounding guide wire is embedded in the spherical middle cavity of the valve body, the other end of the grounding guide wire is connected to the conductive block, and the conductive block is installed on the ground by bolts.

[0007] Preferably, a handle is fixedly connected to the top of the valve stem, and grip grooves are symmetrically provided on the handle, and an anti-slip pad is bonded in the grip groove.

[0008] Preferably, a sealing sleeve is embedded at the connection between the valve stem and the valve body, and the sealing sleeve is made of rubber material.

[0009] Preferably, the sealing assembly comprises a sealing strip and a soft filler, wherein the sealing strip is bonded to the inner walls of the first sealing groove and the second sealing groove, and the soft filler is filled in the gap between the sealing strip and the spherical valve core.

[0010] Preferably, the fireproof component includes an outer shell, a return spring, a push plate, a fireproof barrier plate, a needle and a water storage bag, the inner top wall of the outer shell is compressed with a return spring, the lower end of the return spring is connected to the push plate, the lower side of the push plate is connected to the fireproof barrier plate, the other side of the push plate is provided with a needle, and a water storage bag is provided below the needle, and cooling water is filled in the water storage bag.

[0011] Preferably, the inner top walls of the medium inflow pipe and the medium outflow pipe are both embedded with mounting pads, the mounting pads are made of polytetrafluoroethylene material, and the mounting pads are arranged corresponding to the bottom of the shell.

[0012] Preferably, the inner bottom walls of the medium inflow pipe and the medium outflow pipe are both provided with limiting grooves matched with the fireproof baffle plate, and the limiting grooves are arranged corresponding to the fireproof baffle plate.

[0013] Beneficial effects of the present invention: 1. The present invention sets an electrostatic guide mechanism. When the medium rubs against the ball valve core to generate static electricity during the rapid flow of the medium in the valve body, the grounding guide wire will conduct the static electricity to the conductive block, and the conductive block will conduct the static electricity to the ground, thereby reducing the residual static electricity outside the ball valve, thereby reducing the occurrence of static electricity ignition of the valve, and also reducing the occurrence of fire accidents. It solves the problem that the lack of anti-static structure causes some media to rub against the ball body to generate static electricity during the rapid flow of the medium in the valve body. If the static electricity is not conducted out of the valve body, explosion and fire are very likely to occur; 2. The present invention can prevent the spread of fire in the pipeline through the cooperation of the fireproof component, the installation pad and the limit groove. When the structure encounters a fire, since the installation pad is made of polytetrafluoroethylene, it will decompose and vaporize when encountering high temperature. When the installation pad is decomposed and vaporized, the reset spring will reset, thereby pushing the push plate down, and the push plate drives the fireproof baffle plate to move downward, so that the fireproof baffle plate falls into the medium inflow pipe and the medium outflow pipe to block the fire, thereby slowing down the speed of fire spreading in the pipeline, and by setting the limit groove, the fireproof baffle plate falls into the medium inflow pipe When the medium flows out of the pipeline, it can be limited and fixed, so as to avoid the fire barrier plate from tilting left and right. At the same time, the push plate will drive the needle down during the descent process, so that the needle punctures the water storage bag during the descent process, so that the cooling water inside the water storage bag flows out, and then the inside of the valve body is further cooled, so as to avoid the phenomenon that the temperature inside the valve body is too high and the seal melts. The problem of lack of fireproof structure, which leads to the seal inside the valve body melting easily in case of fire, thus affecting the use effect of the valve, and failing to stop the fire, so that the fire spreads further along the pipeline; 3. The present invention provides a sealing component to achieve double sealing of the spherical valve core, thereby ensuring the sealing performance of the spherical valve core when closed, so that the soft filler can fill the gap between the sealing strip and the spherical valve core, thereby further ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the ultra-low temperature fireproof and anti-static ball valve of the present invention; Figure 2 It is a cross-sectional view of the ultra-low temperature fireproof and anti-static ball valve of the present invention; Figure 3 It is an enlarged schematic diagram of the sealing component of the ultra-low temperature fireproof and anti-static ball valve of the present invention; Figure 4It is a cross-sectional view of the fireproof component of the ultra-low temperature fireproof and anti-static ball valve of the present invention; Figure 5 It is a schematic diagram of fire prevention work of the ultra-low temperature fireproof and anti-static ball valve of the present invention; In the figure: 1-valve body, 2-medium inflow pipe, 3-medium outflow pipe, 4-spherical middle cavity, 5-spherical valve core, 6-valve stem, 61-handle, 62-grip groove, 63-anti-slip pad, 7-first sealing groove, 8-second sealing groove, 9-sealing assembly, 91-sealing strip, 92-soft filler, 10-fireproof assembly, 101-housing, 102-reset spring, 103-push plate, 104-fireproof baffle, 105-needle, 106-water storage bag, 11-static guide mechanism, 111-grounding guide line, 112-conductive block, 12-sealing sleeve, 13-mounting pad, 14-limiting groove. DETAILED DESCRIPTION

[0015] See also Figure 1 The ultra-low temperature fireproof and anti-static ball valve provided in this embodiment includes a valve body 1, a medium inflow pipe 2, a medium outflow pipe 3, a spherical middle cavity 4, a spherical valve core 5, a valve stem 6, a first sealing groove 7, a second sealing groove 8, a sealing component 9, a fireproof component 10, an electrostatic guide mechanism 11, a grounding guide line 111, and a conductive block 112. One end of the valve body 1 is provided with a medium inflow pipe 2 for medium inflow, and the other end of the valve body 1 is provided with a medium outflow pipe 3 for medium outflow. The inner center of the valve body 1 is provided with a spherical middle cavity 4, and the medium inflow pipe 2 and the medium outflow pipe 3 are connected to each other through the spherical middle cavity 4. The inside of the spherical middle cavity 4 is provided with a spherical valve core 5, and the top of the spherical valve core 5 is fixedly connected with a valve stem 6, and the top of the valve stem 6 passes through the outside of the valve body 1 to facilitate opening and closing operations. The bottom is connected to the spherical valve core 5 in the spherical middle cavity 4, so that the spherical valve core 5 can rotate freely in the spherical middle cavity 4. A first sealing groove 7 is provided inside the spherical middle cavity 4 of the valve body 1 near the medium inlet pipe 2, and a second sealing groove 8 is provided inside the spherical middle cavity 4 of the valve body 1 near the medium outlet pipe 3. Sealing components 9 are provided in the first sealing groove 7 and the second sealing groove 8. Fireproof components 10 are provided above the medium inlet pipe 2 and the medium outlet pipe 3. An electrostatic guide mechanism 11 is installed below the valve body 1, and the electrostatic guide mechanism 11 includes a grounding guide wire 111 and a conductive block 112. One end of the grounding guide wire 111 is embedded in the spherical middle cavity 4 of the valve body 1, and the other end of the grounding guide wire 111 is connected to the conductive block 112. The conductive block 112 is installed on the ground by bolts.

[0016] The working principle and beneficial effects of the above scheme are as follows: when the medium generates static electricity by friction with the ball valve core 5 during rapid flow in the valve body 1, the grounding guide wire 111 will conduct the static electricity to the conductive block 112, and the conductive block 112 will conduct the static electricity to the ground, thereby reducing the residual static electricity on the outside of the ball valve, thereby reducing the occurrence of static electricity ignition of the valve and reducing the occurrence of fire accidents.

[0017] In this embodiment, see Figure 1 , Figure 2 and Figure 5 A handle 61 is fixedly connected to the top of the valve stem 6 , and a grip groove 62 is symmetrically opened on the handle 61 , and an anti-slip pad 63 is bonded in the grip groove 62 .

[0018] The working principle and beneficial effects of the above scheme: by providing the grip groove 62, the operator can save more effort in the process of turning the handle 61, and has a better grip point. At the same time, the anti-slip pad 63 can prevent the operator's hands from slipping during operation, thereby further improving the use effect of the ball valve.

[0019] In this embodiment, see Figure 2 and Figure 5 A sealing sleeve 12 is embedded at the connection between the valve stem 6 and the valve body 1, and the sealing sleeve 12 is made of rubber material.

[0020] The working principle and beneficial effects of the above solution are as follows: by providing the sealing sleeve 12, it is possible to prevent the medium from leaking from the connection between the valve stem 6 and the valve body 1, thereby further improving the sealing performance of the ball valve.

[0021] In this embodiment, see Figure 2 , Figure 3 and Figure 5 The sealing assembly 9 includes a sealing strip 91 and a soft filler 92 . The sealing strip 91 is bonded to the inner walls of the first sealing groove 7 and the second sealing groove 8 , and the soft filler 92 is filled in the gap between the sealing strip 91 and the ball valve core 5 .

[0022] The working principle and beneficial effects of the above scheme are as follows: by setting the sealing component 9, the ball valve core 5 is doubly sealed, thereby ensuring the sealing performance of the ball valve core 5 when closed, so that the soft filler 92 can fill the gap between the sealing strip 91 and the ball valve core 5, thereby further ensuring the sealing effect.

[0023] In this embodiment, see Figure 1 , Figure 2 , Figure 4 and Figure 5The fireproof component 10 includes a shell 101, a return spring 102, a push plate 103, a fireproof baffle 104, a needle 105 and a water storage bag 106. The inner top wall of the shell 101 is compressed with a return spring 102, the lower end of the return spring 102 is connected to the push plate 103, the lower side of the push plate 103 is connected to the fireproof baffle 104, the other side of the push plate 103 is provided with a needle 105, and a water storage bag 106 is provided below the needle 105, and the water storage bag 106 is filled with cooling water.

[0024] The working principle and beneficial effects of the above scheme are as follows: the reset spring 102 is reset to push the push plate 103 downward, and the push plate 103 drives the fire barrier plate 104 to move downward, so that the fire barrier plate 104 falls into the medium inflow pipe 2 and the medium outflow pipe 3 to block the fire, thereby slowing down the spread of the fire in the pipe. At the same time, the push plate 103 will drive the needle 105 to descend during the descent process, so that the needle 102 pierces the water storage bag 106 during the descent process, so that the cooling water inside the water storage bag 106 flows out, and then the inside of the valve body 1 is further cooled, thereby avoiding the phenomenon that the temperature inside the valve body 1 is too high and causes the sealing component to melt. In the present application, the fire barrier plate 104 is made of one of the materials such as fiber cement, magnesium silicate, gypsum, polyurethane and aluminum silicate, so as to ensure the durability of the fire barrier plate 104.

[0025] In this embodiment, see Figure 2 , Figure 4 and Figure 5 The inner top walls of the medium inflow pipe 2 and the medium outflow pipe 3 are both embedded with mounting pads 13, and the mounting pads 13 are made of polytetrafluoroethylene. The mounting pads 13 are arranged corresponding to the bottom of the housing 101.

[0026] The working principle and beneficial effects of the above scheme are as follows: when the mounting pad 13 encounters high temperature, it will decompose and vaporize, so that the fire barrier plate 104 can fall and enter into the medium inflow pipe 2 and the medium outflow pipe 3 to block the fire.

[0027] In this embodiment, see Figure 2 and Figure 5 The inner bottom walls of the medium inflow pipe 2 and the medium outflow pipe 3 are both provided with limiting grooves 14 adapted to the fireproof baffle plate 104 , and the limiting grooves 14 are arranged corresponding to the fireproof baffle plate 104 .

[0028] The working principle and beneficial effects of the above scheme: by setting the limiting groove 14, the fire barrier plate 104 can be limited and fixed when it falls into the medium inflow pipe 2 and the medium outflow pipe 3, thereby avoiding the fire barrier plate 104 from tilting left and right, thereby ensuring the blocking and isolating effect of the fire barrier plate 104.

[0029] Working process of the present invention: During the operation of the ultra-low temperature fireproof and anti-static ball valve of the present invention, when the valve body 1 encounters a fire, since the mounting pad 13 is made of polytetrafluoroethylene, the mounting pad 13 will decompose and vaporize when encountering high temperature. When the mounting pad 13 is decomposed and vaporized, the reset spring 102 will reset, thereby pushing the push plate 103 down, and the push plate 103 drives the fireproof baffle plate 104 to move downward, so that the fireproof baffle plate 104 falls into the medium inflow pipe 2 and the medium outflow pipe 3 to block the fire, thereby slowing down the speed of the fire spreading in the pipe. By setting the limiting groove 14, the fire barrier plate 104 can be limited and fixed when it falls into the medium inflow pipe 2 and the medium outflow pipe 3, thereby preventing the fire barrier plate 104 from tilting left and right. At the same time, the push plate 103 will drive the needle 105 to descend during the descent process, so that the needle 105 will pierce the water storage bag 106 during the descent process, so that the cooling water inside the water storage bag 106 flows out, and then the inside of the valve body 1 is further cooled, thereby avoiding the phenomenon that the temperature inside the valve body 1 is too high and causes the sealing component to melt.

[0030] When the medium rapidly flows in the valve body 1 and rubs against the ball valve core 5 to generate static electricity, the grounding guide wire 111 will conduct the static electricity to the conductive block 112, and the conductive block 112 will conduct the static electricity to the ground, thereby reducing the residual static electricity on the outside of the ball valve, thereby reducing the occurrence of static electricity ignition of the valve and reducing the occurrence of fire accidents.

[0031] 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.

[0032] 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 fireproof and anti-static ball valve, characterized by: The invention comprises a valve body (1), a medium inflow pipe (2), a medium outflow pipe (3), a spherical middle cavity (4), a spherical valve core (5), a valve stem (6), a first sealing groove (7), a second sealing groove (8), a sealing component (9), a fireproof component (10), an electrostatic guide mechanism (11), a grounding guide wire (111), and a conductive block (112), wherein one end of the valve body (1) is provided with a medium inflow pipe (2) for medium inflow, and the other end of the valve body (1) is provided with a grounding guide wire (111) for medium inflow. The valve body (1) is provided with a spherical middle cavity (4) at the center of the inner part of the valve body (1); the medium inflow pipe (2) and the medium outflow pipe (3) are connected to each other through the spherical middle cavity (4); a spherical valve core (5) is provided inside the spherical middle cavity (4); a valve stem (6) is fixedly connected to the top of the spherical valve core (5); the top of the valve stem (6) passes through the outside of the valve body (1) to facilitate opening and closing operations; the bottom of the valve stem (6) is connected to the spherical middle cavity (4); ) is connected to the spherical valve core (5) in the spherical middle cavity (4) so ​​that the spherical valve core (5) can rotate freely in the spherical middle cavity (4); a first sealing groove (7) is provided inside the spherical middle cavity (4) of the valve body (1) near the medium inflow pipe (2); a second sealing groove (8) is provided inside the spherical middle cavity (4) of the valve body (1) near the medium outflow pipe (3); a sealing assembly (9) is provided in each of the first sealing groove (7) and the second sealing groove (8); the medium inflow pipe (2) and the medium outflow pipe (3) are connected to each other by a sealing assembly (9); A fireproof component (10) is arranged above the mass flow outflow pipe (3), and an electrostatic guide mechanism (11) is installed below the valve body (1). The electrostatic guide mechanism (11) comprises a grounding guide wire (111) and a conductive block (112). One end of the grounding guide wire (111) is embedded in the spherical middle cavity (4) of the valve body (1), and the other end of the grounding guide wire (111) is connected to the conductive block (112). The conductive block (112) is installed on the ground by bolts.

2. The ultra-low temperature fireproof and anti-static ball valve according to claim 1, characterized in that: A handle (61) is fixedly connected to the top of the valve stem (6), and a grip groove (62) is symmetrically provided on the handle (61), and an anti-slip pad (63) is bonded inside the grip groove (62).

3. The ultra-low temperature fireproof and anti-static ball valve according to claim 1, characterized in that: A sealing sleeve (12) is embedded at the connection between the valve stem (6) and the valve body (1), and the sealing sleeve (12) is made of rubber material.

4. The ultra-low temperature fireproof and anti-static ball valve according to claim 1, characterized in that: The sealing assembly (9) comprises a sealing strip (91) and a soft filler (92); the sealing strip (91) is bonded to the inner walls of the first sealing groove (7) and the second sealing groove (8); and the soft filler (92) is filled in the gap between the sealing strip (91) and the ball valve core (5).

5. The ultra-low temperature fireproof and anti-static ball valve according to claim 1, characterized in that: The fireproof component (10) comprises a housing (101), a return spring (102), a push plate (103), a fireproof baffle plate (104), a needle (105) and a water storage bag (106); the return spring (102) is compressed on the inner top wall of the housing (101); the lower end of the return spring (102) is connected to the push plate (103); the lower side of the push plate (103) is connected to the fireproof baffle plate (104); the other side of the push plate (103) is provided with a needle (105); the water storage bag (106) is provided below the needle (105); and cooling water is filled into the water storage bag (106).

6. The ultra-low temperature fireproof and anti-static ball valve according to claim 5, characterized in that: The inner top walls of the medium inflow pipe (2) and the medium outflow pipe (3) are both embedded with mounting pads (13), the mounting pads (13) are made of polytetrafluoroethylene material, and the mounting pads (13) are arranged corresponding to the bottom of the outer shell (101).

7. The ultra-low temperature fireproof and anti-static ball valve according to claim 5, characterized in that: The inner bottom walls of the medium inflow pipe (2) and the medium outflow pipe (3) are both provided with a limiting groove (14) adapted to the fireproof baffle plate (104), and the limiting groove (14) is arranged corresponding to the fireproof baffle plate (104).

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