Heptafluoropropane bottle valve

Abstract

The utility model discloses a heptafluoropropane bottle head valve, belongs to the technical field of valve body structures, and provides a heptafluoropropane bottle head valve which is more flexible in function expansion and comprises a valve body, one end of the valve body is an air inlet end, the other end of the valve body is fixedly connected with a pressing cap, a piston is arranged in the valve body, and the part, located between the pressing cap and the piston, of the interior of the valve body is an air chamber. The side face of the valve body is provided with an air outlet end, the piston is suitable for changing the on-off state of the air inlet end and the air outlet end through the air pressure difference between the upper end and the lower end, and the side wall of the valve body is further provided with a plurality of configuration ends suitable for installing a plugging structure or a detection instrument. The configuration end structure capable of being matched with various parts is designed outside the valve body, so that the valve body can be connected with a plugging structure playing a sealing role and can also be connected with a detection instrument playing a monitoring role, the functions of the bottle valve can be expanded and changed, and the flexibility of function selection is higher; the safety coefficient of the valve in the transportation process is higher.

Description

Technical Field

[0001] This application relates to the technical field of valve body structures, and particularly to a heptafluoropropane cylinder valve head. Background Art

[0002] At present, most of the valve body structures used in fire extinguishers can only achieve the functions of opening and closing. There are also some valve bodies with more complex structures that take into account safety guarantee functions. However, once the valve body leaves the factory, its functions will be fixed, and it is neither possible to add functions when needed nor to remove functions when not needed. Summary of the Invention

[0003] The purpose of this application is to provide a heptafluoropropane cylinder valve head with more flexible function expansion.

[0004] To achieve the above purpose, this application provides a heptafluoropropane cylinder valve head: including a valve body, one end of the valve body is an air inlet end, and the other end is fixedly connected with a compression nut. A piston is arranged inside the valve body. The part between the compression nut and the piston inside the valve body is an air chamber. A first valve core is arranged in the center of the compression nut and is adapted to communicate the air chamber with the outside. The side of the valve body has an air outlet end. The piston is adapted to change the on-off state between the air inlet end and the air outlet end by using the air pressure difference between the upper and lower ends. The side wall of the valve body also has several configuration ends, which are adapted to install a plugging structure or a detection instrument. The detection instrument includes but is not limited to a pressure gauge, a hydraulic pressure gauge, and a flow meter.

[0005] As a preference, the compression nut is provided with a convection channel communicating the air chamber with the outside. The first valve core is fixedly connected in the convection channel and is used to control the opening and closing of the convection channel.

[0006] As a preference, the side wall of the valve body has a first configuration end and a second configuration end. The first configuration end is internally communicated with the air outlet end through a first communication hole, and the second configuration end is internally communicated with the air inlet end through a second communication hole, so that the probe of the detection instrument can sense the fluid state inside the valve body.

[0007] As a preference, a plug is installed in the first configuration end, a sealing bolt is in threaded fit in the second communication hole, and a plugging head is installed in the second configuration end. This installation method eliminates the monitoring function, making the structure of the entire cylinder valve head simpler, with lower failure rate and higher error tolerance.

[0008] As a preference, after removing the plug, a pressure gauge is adapted to be installed in the first configuration end. After removing the sealing bolt and the plugging head, a pressure gauge is also adapted to be installed in the second configuration end, which can effectively detect the pressure change of the fluid inside the valve body.

[0009] As a preference, the side wall of the valve body further has a locking sleeve, and a locking device is arranged inside the locking sleeve. The main body part of the locking device is a rod body. A part between the two ends of the rod body has a first threaded section, and one end of the rod body has a second threaded section. The first threaded section and the second threaded section are adapted to be threadedly engaged with the locking sleeve respectively. A signal inductor is fixedly connected to the side wall of the locking sleeve. A locking ring groove is formed on the outer side surface of the piston. The end of the piston facing the air inlet end is fixedly connected with a sealing member through a pressing bolt, and is adapted to be in close contact with the annular stepped surface of the inner wall of the valve body. When the first threaded section is completely screwed into the locking sleeve, the other end of the locking device is embedded into the locking ring groove, and the piston is limited in position, and the signal inductor has no signal; when the second threaded section is completely screwed into the locking sleeve, the piston is free, and the signal inductor has a signal, enabling remote centralized monitoring, which is more efficient and safe.

[0010] As a preference, a sealing ring groove is further formed on the outer side surface of the piston near the upper end. A sealing ring is arranged in the sealing ring groove of the piston. A retaining ring is arranged between the first threaded section and the second threaded section. A label plate is fixedly connected to the end face of the retaining ring. The end face of the label plate facing the first threaded section is green, and the end facing the second threaded section is red, which is used to visually identify the state of the bottle head valve.

[0011] As a preference, a pressure relief chamber is formed on the outer side surface of the valve body. The pressure relief chamber is internally communicated with the air inlet end. A safety component is arranged in the pressure relief chamber. The safety component includes a sealing gasket and a safety pressure ring located in the pressure relief chamber, and a safety plug screw threadedly engaged with the inner wall of the pressure relief chamber. The safety pressure ring is pressed between the sealing gasket and the safety plug screw. A pressure relief hole penetrating the inner and outer walls is formed in the part of the safety plug screw located outside the pressure relief chamber, discharging the redundant heptafluoropropane gas and reducing the damage probability of the valve body and the container bottle.

[0012] As a preference, an exhaust passage penetrating the inner and outer walls is formed on the side wall of the valve body. A second valve core is fixedly connected in the exhaust passage of the valve body, which is used to conveniently release the redundant heptafluoropropane gas in the container bottle.

[0013] As a preference, an internal threaded hole penetrating the inner wall is formed on the outer side surface of the air inlet end. The air inlet end is threadedly connected with a set screw (10) through the internal threaded hole, which is used to fix the siphon tube inserted into the air inlet end.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows:

[0015] (1) By designing a configuration end structure on the valve body that can adapt to a variety of components, the valve body can be connected to a plugging structure for sealing or a detection instrument for monitoring, enabling the functions of the bottle head valve to be expanded and changed, and providing higher flexibility in function selection.

[0016] (2) By setting a locking device on the valve body, the safety factor of the bottle head valve during transportation, installation, and maintenance can be improved.

[0017] (3) A siphon tube can be installed at the air inlet end of the bottle head valve, which is applicable to both internal and external pressure storage type heptafluoropropane gas fire extinguishing systems, and also provides higher adaptability flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is the first three-dimensional schematic diagram of the overall structure of the heptafluoropropane bottle head valve.

[0019] Figure 2 FIG. is the second three-dimensional schematic diagram of the overall structure of the heptafluoropropane bottle head valve.

[0020] Figure 3 FIG. is the side view plane cross-sectional view of the heptafluoropropane bottle head valve.

[0021] Figure 4 FIG. is the plane cross-sectional view of the first installation method of the locking device of the heptafluoropropane bottle head valve.

[0022] Figure 5 FIG. is the plane cross-sectional view of the second installation method of the locking device of the heptafluoropropane bottle head valve.

[0023] In the figures: 1, compression cap; 101, convection channel; 102, first valve core; 2, valve body; 201, air inlet end; 202, air outlet end; 203, first configuration end; 204, second configuration end; 205, locking sleeve; 206, first communication hole; 207, pressure relief chamber; 208, second communication hole; 209, exhaust channel; 210, internal screw hole; 3, plug; 4, plug head; 401, sealing bolt; 5, locking device; 501, first threaded section; 502, second threaded section; 503, retaining ring; 504, nameplate; 6, induction signaler; 7, safety component; 701, sealing gasket; 702, safety pressure ring; 703, safety plug; 704, pressure relief hole; 8, piston; 801, locking ring groove; 802, seal; 803, sealing ring groove; 804, sealing ring; 805, compression bolt; 9, second valve core; 10, set screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, in combination with the specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, any combination of the following described embodiments or technical features can form a new embodiment.

[0025] In the description of the present application, it should be noted that for the orientation terms, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0027] The terms "comprising" and "having" in the description and claims of the present application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0028] As Figures 1-5 shown in the heptafluoropropane cylinder head valve, it includes a valve body 2 made of an inner corrosion-resistant alloy material. The main body part of the valve body 2 is cylindrical. One end of the valve body 2 is an air inlet end 201, and an external thread is usually provided on the outer side of the air inlet end 201; the other end of the valve body 2 is fixedly connected with a compression cap 1, and the compression cap 1 is also fixedly connected with the valve body 2 through a thread. An O-ring seal is also provided between the inner wall of the compression cap 1 and the end face of the valve body 2 to ensure the airtightness after fitting. An internal screw hole 210 penetrating the inner wall is provided on the outer side of the air inlet end 201. A set screw 10 is threadedly connected to the air inlet end 201 through the internal screw hole 210. The set screw 10 can change its depth in the internal screw hole 210 by rotation. A rigid siphon tube can be inserted into the air inlet end 201 and fixed in the air inlet end 201 by the screwed-in set screw 10. An O-ring seal is usually also provided on the inner wall of the air inlet end 201 to ensure the airtightness after the siphon tube is inserted into the air inlet end 201.

[0029] A piston 8 is arranged inside the valve body 2 and can only reciprocate along the axial direction of the valve body 2. The part inside the valve body 2 between the gland 1 and the piston 8 is an air chamber, which only allows gas to enter and exit. A first valve core 102 is arranged in the center of the gland 1 for communicating the air chamber with the outside. Specifically, the gland 1 is provided with a convection channel 101 communicating the air chamber with the outside, and the first valve core 102 is fixedly connected inside the convection channel 101. The side of the valve body 2 also has an air outlet end 202. The piston 8 can change the on-off state of the air inlet end 201 and the air outlet end 202 by using the pressure difference between the upper and lower ends. Generally, when the pressure in the air chamber is greater than the pressures in both the air inlet end 201 and the air outlet end 202, the piston 8 will cut off the air inlet end 201 and the air outlet end 202; when at least one of the pressures in the air inlet end 201 or the air outlet end 202 is greater than the pressure in the air chamber, the piston 8 will leave the restricted position of the inner wall stepped surface of the valve body 2, so that the air inlet end 201 and the air outlet end 202 are communicated, as Figure 3 , Figure 4 and Figure 5 shown. The stepped end surface inside the valve body 2 has a concave structure, which enables the pressure received by the lower end of the piston 8 to be greater than the pressure received by the upper end when pressurizing the air outlet end 202, so that the piston 8 moves upward to leave the restricted position inside the valve body 2. The end of the piston 8 facing the air inlet end 201 is fixedly connected with a seal 802 made of rubber material through a compression bolt 805. The seal 802 is in direct close contact with the annular stepped surface of the inner wall of the valve body 2, thus avoiding hard contact and ensuring the airtightness when the piston 8 cuts off the air inlet end 201 and the air outlet end 202. A sealing ring groove 803 is also formed on the outer side of the piston 8 near the upper end, and a sealing ring 804 is arranged in the sealing ring groove 803 of the piston 8 to ensure the airtightness of the air chamber inside the valve body 2, so that the bottle head valve can maintain a stable closed state for a long time.

[0030] The side wall of the valve body 2 also has a locking sleeve 205. The locking sleeve 205 is roughly located at the central part in the axial direction of the valve body 2. The piston 8 is also close to this position. A locking device 5 is arranged in the locking sleeve 205. The main part of the locking device 5 is a cylindrical rod body. The part between the two ends of the rod body has a first threaded section 501 with a larger diameter. One end of the rod body has a second threaded section 502 with the same size as the first threaded section 501. Only one of the first threaded section 501 and the second threaded section 502 can be in threaded fit with the locking sleeve 205 at the same time. A signal inducer 6 is fixedly connected to the side wall of the locking sleeve 205. The end part of the signal inducer 6 located inside the locking sleeve 205 has a probe. A signal will be output only when the probe is very close to an obstacle. A locking ring groove 801 is formed on the outer side surface of the piston 8. The vertical height of the locking ring groove 801 is slightly larger than the diameter of the other end of the locking device 5 without the second threaded section 502. When the first threaded section 501 is fully screwed into the locking sleeve 205, the other end of the locking device 5 will be embedded into the locking ring groove 801. In this way, the piston 8 is limited. The part of the signal inducer 6 facing the locking device 5 is at a relatively far distance and no signal is output. At this time, the bottle head valve cannot work normally. When the second threaded section 502 is fully screwed into the locking sleeve 205, the piston 8 is not restricted and is free. The signal inducer 6 faces the outside of the second threaded section 502 and is very close, and a signal is output. At this time, the bottle head valve is in a state where it can work normally. There is a retaining ring 503 with a larger diameter between the first threaded section 501 and the second threaded section 502. A nameplate 504 is fixedly connected to the end surface of the retaining ring 503. The end surface of the nameplate 504 facing the first threaded section 501 is green, and the end facing the second threaded section 502 is red, which is used to visually identify whether the bottle head valve is in a state where it can be normally operated. Green facing outwards means it can be normally operated; red facing outwards means it cannot be normally operated. In order to ensure the airtightness of the end part of the locking sleeve 205 after the locking device 5 is fitted, O-shaped sealing rings are also sleeved on the rod body of the locking device 5 at both ends of the retaining ring 503.

[0031] The side wall of the valve body 2 also has several configuration ends for installing plugging structures or detection instruments, which can be selected according to actual needs. Generally, the side wall of the valve body 2 has two configuration ends, namely the first configuration end 203 and the second configuration end 204. Among them, the first configuration end 203 is internally connected to the air outlet end 202 through the first communication hole 206, and the second configuration end 204 is internally connected to the air inlet end 201 through the second communication hole 208. If the safety requirements of the bottle head valve are not high, a plug 3 will be installed in the first configuration end 203. The plug 3 is in threaded fit with the inner wall of the first configuration end 203. A sealing bolt 401 is in threaded fit in the second communication hole 208, and a plug 4 is installed in the second configuration end 204. The plug 4 is conical and elastic and can be directly plugged in. When it is necessary to observe the air pressure changes in the valve body 2 and the container bottle during inflation or deflation, after removing the plug 3, a pressure gauge can be installed in the first configuration end 203. Or after removing the sealing bolt 401 and the plug 4, a pressure gauge can be installed in the second configuration end 204. Generally, an electronic pressure gauge is selected, and it can transmit monitoring signals to a distance through the signal generator on the induction signaler 6.

[0032] A pressure relief chamber 207 is opened on the outer side surface of the valve body 2. The pressure relief chamber 207 is internally connected to the air inlet end 201. The air pressure inside the pressure relief chamber 207 is the gas pressure inside the air inlet end 201 and the container bottle. A safety component 7 is arranged inside the pressure relief chamber 207 to reduce the probability of damage to the container bottle and the bottle head valve. The specific structure of the safety component 7 includes a sealing gasket 701 and a safety pressure ring 702 located inside the pressure relief chamber 207, and a safety plug 703 in threaded fit with the inner wall of the pressure relief chamber 207. Most of the safety plug 703 is located inside the pressure relief chamber 207. The safety pressure ring 702 is a thin metal sheet that can withstand a certain pressure and is pressed tightly between the sealing gasket 701 and the safety plug 703. A pressure relief hole 704 penetrating the inner and outer walls is opened in the part of the safety plug 703 located outside the pressure relief chamber 207, and the air flow that breaks through the safety pressure ring 702 is discharged therefrom. An exhaust passage 209 penetrating the inner and outer walls is opened on the side wall of the valve body 2. A second valve core 9 is fixedly connected inside the exhaust passage 209 of the valve body 2, which can release the gas inside the air inlet end 201 connected to the container bottle more controllably. When the container bottle is filled with excessive heptafluoropropane, it is particularly useful to release the excess gas inside the container bottle.

[0033] Working principle: A rigid siphon tube can be inserted at the air inlet end 201 of the heptafluoropropane bottle head valve, and the set screw 10 is tightened to be installed on the fire extinguishing agent container. When filling the container with the fire extinguishing agent, the locking device 5 is in accordance with Figure 5When installed as shown, the outside of the on-site sign 504 is shown in green. Similarly, the induction signaler 6 has a signal output. The gas outlet end 202 of the valve body 2 can be selected as the filling port. When filling the fire extinguishing agent at the gas outlet end 202, the piston 8 moves upward under the impact of the fire extinguishing agent gas. At this time, the valve opens. After the fire extinguishing agent fills the container through the gas inlet end 201, since the pressure of the fire extinguishing agent in the valve body 2 is the same on both the upper and lower sides of the piston 8, the piston 8 cannot automatically close the valve. It is necessary to inflate and pressurize through the first valve core 102 at the compression cap 1 to increase the pressure in the gas chamber of the valve body 2. The piston 8 will move downward under the action of the pressure difference between the upper and lower sides until the valve is completely closed before removing the inflating device for the fire extinguishing agent;

[0034] When the bottle head valve is in the transportation, installation, and maintenance states, remove the locking device 5 and install it on the valve body 2 in the direction Figure 4 shown, so that the end of the rod part of the locking device 5 abuts against the piston 8 inside the valve body 2. The piston 8 is limited. The outside of the on-site sign 504 is shown in red. Similarly, the induction signaler 6 has no signal output. At this time, the valve cannot work properly. In fact, the valve is in the closed state and cannot be opened normally.

[0035] After the fire extinguishing agent container is installed, the locking device 5 needs to be installed as shown in Figure 5 shown. The on-site sign 504 is shown in green. Similarly, the induction signaler 6 has a signal output. During fire extinguishing, apply pressure to the first valve core 102 at the top of the compression cap 1. The gas in the gas chamber of the valve body 2 is released from the first valve core 102, and the gas pressure in the gas chamber decreases accordingly. The pressure difference between the upper and lower sides of the piston 8 changes, and the upper pressure is less than the lower pressure. Under the action of the gas pressure in the container, the piston 8 is pushed upward, the valve is opened, the gas inlet end 201 and the gas outlet end 202 are connected, and the fire extinguishing gas flows from the gas inlet end 201 through the valve to the gas outlet end 202, thus realizing the release of the fire extinguishing gas;

[0036] Generally, only a pressure gauge needs to be configured in the second configuration end 204 to monitor the air pressure values at the gas inlet end 201 and inside the container bottle. A plug 3 is directly installed in the first configuration end 203 to ensure the airtightness of the valve body 2. The entire heptafluoropropane bottle head valve can ensure a high working safety factor.

[0037] The above describes the basic principle, main features, and advantages of this application. Those skilled in the art of this industry should understand that this application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of this application. Without departing from the spirit and scope of this application, this application will have various changes and improvements, and these changes and improvements all fall within the scope of this application claimed. The scope of protection required by this application is defined by the appended claims and their equivalents.

Claims

1. A heptafluoropropane bottle head valve, characterized in that: It includes a valve body (2), one end of the valve body (2) is an air inlet end (201), and a compression cap (1) is fixedly connected to the other end. A piston (8) is arranged inside the valve body (2). The part between the compression cap (1) and the piston (8) inside the valve body (2) is an air chamber. A first valve core (102) is arranged in the center of the compression cap (1) and is adapted to communicate the air chamber with the outside. The side of the valve body (2) has an air outlet end (202). The piston (8) is adapted to change the on-off state between the air inlet end (201) and the air outlet end (202) by using the air pressure difference between the upper and lower ends. The side wall of the valve body (2) also has several configuration ends and is adapted to install a plugging structure or a detection instrument.

2. The heptafluoropropane cylinder valve according to claim 1, characterized in that: The compression cap (1) is provided with a convection channel (101) communicating the air chamber with the outside, and the first valve core (102) is fixedly connected inside the convection channel (101).

3. The heptafluoropropane cylinder valve according to claim 2, characterized in that: The side wall of the valve body (2) has a first configuration end (203) and a second configuration end (204). The first configuration end (203) is internally communicated with the air outlet end (202) through a first communication hole (206), and the second configuration end (204) is internally communicated with the air inlet end (201) through a second communication hole (208).

4. The heptafluoropropane bottle head valve according to claim 3, characterized in that: A plug (3) is installed inside the first configuration end (203), a sealing bolt (401) is in threaded fit inside the second communication hole (208), and a plug (4) is installed inside the second configuration end (204).

5. The heptafluoropropane bottle head valve according to claim 4, wherein: After removing the plug (3), a pressure gauge is adapted to be installed inside the first configuration end (203). After removing the sealing bolt (401) and the plug (4), a pressure gauge is also adapted to be installed inside the second configuration end (204).

6. The heptafluoropropane cylinder valve according to any one of claims 1 to 5, characterized in that: The side wall of the valve body (2) also has a locking sleeve (205). A locking device (5) is arranged inside the locking sleeve (205). The main body part of the locking device (5) is a rod body. The part between the two ends of the rod body has a first thread section (501), and one end of the rod body has a second thread section (502). The first thread section (501) and the second thread section (502) are adapted to be in threaded fit with the locking sleeve (205) respectively. An induction signal device (6) is also fixedly connected to the side wall of the locking sleeve (205). A locking ring groove (801) is formed on the outer side surface of the piston (8). The end of the piston (8) facing the air inlet end (201) is fixedly connected with a sealing member (802) through a compression bolt (805) and is adapted to be in close contact with the annular stepped surface of the inner wall of the valve body (2). When the first thread section (501) is fully screwed into the locking sleeve (205), the other end of the locking device (5) is embedded into the locking ring groove (801), and the piston (8) is limited. The induction signal device (6) has no signal. When the second thread section (502) is fully screwed into the locking sleeve (205), the piston (8) is free, and the induction signal device (6) has a signal.

7. The heptafluoropropane bottle head valve according to claim 6, characterized in that: The outer side of the piston (8) is also provided with a sealing ring groove (803) near the upper end. A sealing ring (804) is arranged in the sealing ring groove (803) of the piston (8). There is a retaining ring (503) between the first threaded section (501) and the second threaded section (502). A nameplate (504) is fixedly connected to the end face of the retaining ring (503). The end face of the nameplate (504) facing the first threaded section (501) is green, and the end facing the second threaded section (502) is red.

8. The heptafluoropropane cylinder valve according to any one of claims 1 to 5, characterized in that: The outer side of the valve body (2) is provided with a pressure relief cavity (207). The pressure relief cavity (207) is internally communicated with the air inlet end (201). A safety component (7) is arranged in the pressure relief cavity (207). The safety component (7) includes a sealing gasket (701) and a safety retaining ring (702) located in the pressure relief cavity (207), and a safety plug (703) threadedly engaged with the inner wall of the pressure relief cavity (207). The safety retaining ring (702) is pressed between the sealing gasket (701) and the safety plug (703). A pressure relief hole (704) penetrating the inner and outer walls is provided in the part of the safety plug (703) located outside the pressure relief cavity (207).

9. The heptafluoropropane cylinder valve according to claim 8, wherein: An exhaust passage (209) penetrating the inner and outer walls is provided in the side wall of the valve body (2). A second valve core (9) is fixedly connected to the valve body (2) in the exhaust passage (209).

10. The heptafluoropropane bottle head valve according to claim 8, wherein: An internal threaded hole (210) penetrating the inner wall is provided in the outer side of the air inlet end (201). A set screw (10) is threadedly connected to the air inlet end (201) through the internal threaded hole (210).

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