A reusable opening and closing perfluoroketone nozzle valve

Abstract

The present invention discloses a reusable opening and closing perfluoropentanone bottle head valve, which comprises a valve body. A cylinder interface is provided at the lower end of the valve body, a spraying interface is provided on one side, a valve cover is installed at the upper end. A valve core is arranged inside the valve body, and a spring is arranged between the valve core and the valve cover. A connecting nut is screwed on the upper end of the valve cover. A stepped hole and a first through hole are provided on the valve cover. An actuating ejector rod assembly is slidably installed in the stepped hole. The actuating ejector rod assembly includes a nozzle outer sleeve and a nozzle ejector rod installed inside the nozzle outer sleeve. The flange portion of the nozzle outer sleeve is in sealing sliding fit with the inner wall of the stepped hole. A guide rod is connected to the lower end of the nozzle ejector rod. There is a gap between the inner wall of the nozzle outer sleeve and the outer circumferential surface of the nozzle ejector rod. A second sealing ring is installed at the upper end surface of the guide rod where the nozzle ejector rod is located to seal the lower end of the gap. When the nozzle ejector rod is pushed downward by an external force to make the second sealing ring away from the lower end surface of the nozzle outer sleeve, the upper part of the valve core is communicated with the atmosphere, and the valve core moves upward to the opening position and remains there.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting equipment, and particularly to a fully fluorinated hexanone bottle head valve that can be repeatedly opened and closed. Background Art

[0002] A bottle head valve is a valve installed at the interface of a steel cylinder. Usually, the upper and lower cavities of the valve core are balanced in air pressure to achieve closing and sealing. When the upper cavity is depressurized, the bottle head valve is opened. In the prior art, the upper cavity of such a bottle head valve is depressurized by piercing a sealing diaphragm with a sharp component. In this way, after each fire extinguishing operation, the sealing diaphragm needs to be replaced and installed, and the cost of the diaphragm is high, and the replacement and installation operation is time-consuming. At the same time, the sealing between the sealing mouth ring and the valve core of the valve adopts an end face sealing method, that is, a flat sealing gasket contacts the upper end of the sealing mouth ring when the valve is closed. The pushing pressure and the sealing pressure of this structure are equal in magnitude and opposite in direction. Therefore, this sealing method requires a large sealing pressure and is prone to leakage. Summary of the Invention

[0003] The purpose of the present invention is to provide a fully fluorinated hexanone bottle head valve that can be repeatedly opened and closed to solve the problems in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A fully fluorinated hexanone bottle head valve that can be repeatedly opened and closed, including a valve body 1. The lower end of the valve body 1 is provided with a steel cylinder interface 18, one side is provided with a spraying interface 2, and the upper end is equipped with a valve cover 5. A valve core 3 is arranged in the valve body 1 to cooperate with the sealing mouth ring 101 to connect or disconnect the steel cylinder interface 18 and the spraying interface 2. A spring 4 is arranged between the valve core 3 and the valve cover 5. A connecting nut 6 is screwed on the upper end of the valve cover 5. A stepped hole 501 and a first through hole 502 are coaxially communicated on the valve cover 5. A starting push rod assembly 7 is slidably installed in the stepped hole 501. The starting push rod assembly 7 includes a nozzle outer sleeve 701 and a nozzle push rod 702 installed in the nozzle outer sleeve 701. The flange portion 7012 of the nozzle outer sleeve 701 is in sealing sliding fit with the inner wall of the stepped hole 501. A guide rod 703 is connected to the lower end of the nozzle push rod 702. There is a gap 704 between the inner wall of the nozzle outer sleeve 701 and the outer circumferential surface of the nozzle push rod 702. A second sealing ring 16 is installed at the upper end face of the guide rod 703 of the nozzle push rod 702 to seal the lower end of the gap 704. When the nozzle push rod 702 is pushed downward by an external force to make the second sealing ring 16 away from the lower end face of the nozzle outer sleeve 701, the upper part of the valve core 3 is communicated with the atmosphere, and the valve core 3 moves upward to open and remain open.

[0005] Further, an accommodation cavity 7011 is also provided at the upper part of the nozzle outer sleeve 701. A compression cap 705 is installed at the upper end of the nozzle ejector rod 702. The compression cap 705 is located in the accommodation cavity 7011 and is in clearance fit with the accommodation cavity 7011.

[0006] Further, a second through hole 301 is axially provided in the valve core 3. A gas guiding nut 13 is coaxially screwed on the valve core 3 and is provided with a gas guiding hole 1301 and an accommodation hole 1302. The second through hole 301 is coaxial with the accommodation hole 1302 and is adapted to the outer diameter of the lower part of the guiding rod 703. The cross-sectional area of the gas guiding hole 1301 is smaller than the area of the gap 704. A third sealing ring 17 is installed between the adjacent port surfaces of the second through hole 301 and the accommodation hole 1302.

[0007] Further, a pressure gauge interface 8, a pressure relief interface 19, and a pressure sensor interface 20 are circumferentially and spacedly provided below the spraying interface 2 on the valve body 1. A pressure gauge 9 is installed on the pressure gauge interface 8. A pressure relief plug 10 and a safety diaphragm 11 are installed on the pressure relief interface 19. A pressure sensor 12 is installed in the pressure sensor interface 20.

[0008] Further, a buffer pad 14 is also installed at the lower end of the valve cover 5.

[0009] Further, a first sealing ring 15 is sleeved on the outer circumference of the flange portion 7012 of the nozzle outer sleeve 701.

[0010] Further, a first stepped stage 302, a second stepped stage 303, and a third stepped stage 304 are coaxially and sequentially connected to the outer circumferential surface of the lower end of the valve core 3. A pressure sleeve 23 is sleeved on the first stepped stage 302. The inner wall of the pressure sleeve 23 and the inner flange 2301 at its lower end clamp the fourth sealing ring 21 on the second stepped stage 303. The sealing port ring 101 includes an outer conical surface 103. An arc surface 102 for contact and fit with the inner lower side surface of the fourth sealing ring 21 is provided between the upper end surface of the sealing port ring 101 and the outer conical surface 103. When the fourth sealing ring 21 contacts the arc surface 102, at least a part of the third stepped stage 304 extends into the inner wall of the sealing port ring 101 and the third stepped stage 304 is in sliding fit with the inner wall of the sealing port ring 101.

[0011] Further, a fifth sealing ring 22 is installed on the outer wall of the upper end of the valve core 3. A spacing L for the sealing port ring 101 to extend into is provided between the third stepped stage 304 and the inner flange 2301.

[0012] Advantages of the present invention: A reusable opening and closing perfluoropentanone nozzle valve provided by the present invention uses a starting ejector rod assembly structure to control the upper part of the valve core (i.e., the upper cavity) to communicate with the atmosphere to open the nozzle valve. The opening speed is fast, the starting ejector rod assembly can automatically reset when filling the fire extinguishing gas, the operation is convenient, and the sealing performance is good. At the same time, a safety diaphragm is provided to automatically relieve pressure when the pressure in the steel cylinder exceeds the set safety limit. The daily maintenance and inspection are facilitated by the installed pressure gauge. By setting a pressure sensor, it is beneficial to realize automatic monitoring and improve the automation level of the inspection of fire extinguishing equipment; a third stage is provided at the lower end of the valve core. When the nozzle valve is closed, at least a part of the third stage extends into the inner wall of the sealing ring and the two are in sliding fit to form a preliminary seal. Moreover, the sealing pair formed by the lower side surface of the fourth sealing ring and the arc surface decomposes the pressure generated by the sealed gas on the fourth sealing ring into a thrust to push the valve core upward to open the nozzle valve and a horizontal thrust to deform the fourth sealing ring outward. Since the outside of the fourth sealing ring is restricted by the inner wall and the inner flange of the pressure sleeve, the fourth sealing ring can only deform downward. This deformation makes the joint between the fourth sealing ring and the arc surface of the sealing ring more tightly engaged, and the sealing effect is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a cross-sectional view of the present invention;

[0014] Figure 2 is a partial side cross-sectional view of the present invention;

[0015] Figure 3 is a schematic diagram of the valve core of the present invention in the open position;

[0016] Figure 4 is Figure 1 a partial enlarged view of part A in

[0017] Figure 5 is Figure 1 a partial enlarged view of part B in

[0018] Figure 6 is Figure 5 a partial enlarged view of part C in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-6, A repeatable opening and closing perfluoropentanone nozzle valve, comprising a valve body 1. A cylinder interface 18 is provided at the lower end of the valve body 1, a discharge interface 2 is provided on one side, and a valve cover 5 is installed at the upper end. A valve core 3 is provided in the valve body 1 for cooperating with a sealing port ring 101 to connect or disconnect the cylinder interface 18 and the discharge interface 2. A spring 4 is provided between the valve core 3 and the valve cover 5. A connection nut 6 is screwed on the upper end of the valve cover 5. A stepped hole 501 and a first through hole 502 are coaxially connected on the valve cover 5. A starting push rod assembly 7 is slidably installed in the stepped hole 501. The starting push rod assembly 7 includes a nozzle outer sleeve 701 and a nozzle push rod 702 installed in the nozzle outer sleeve 701. The flange portion 7012 of the nozzle outer sleeve 701 is in sealing sliding fit with the inner wall of the stepped hole 501. Specifically, a first sealing ring 15 is sleeved on the outer circle of the flange portion 7012 of the nozzle outer sleeve 701. A guide rod 703 is connected to the lower end of the nozzle push rod 702. There is a gap 704 between the inner wall of the nozzle outer sleeve 701 and the outer surface of the nozzle push rod 702. A second sealing ring 16 is installed at the upper end surface of the guide rod 703 of the nozzle push rod 702 to seal the lower end of the gap 704. When the nozzle push rod 702 is pushed downward by an external force to make the second sealing ring 16 away from the lower end surface of the nozzle outer sleeve 701, the upper part of the valve core 3 is communicated with the atmosphere, and the valve core 3 moves upward to open and remain open. Here, a driving part interface 601 is provided at the upper end of the connection nut 6. The driving part interface 601 adopts a threaded interface structure. Here, the driving part can be a manual pressing rod or an electromagnet. The above external force is provided by the manual pressing rod or the electromagnet.

[0021] As a preferred embodiment, a receiving cavity 7011 is further provided at the upper part of the nozzle outer sleeve 701. A pressure cap 705 is installed at the upper end of the nozzle push rod 702. The pressure cap 705 is located in the receiving cavity 7011 and is in clearance fit with the receiving cavity 7011. In this way, it is prevented that the nozzle push rod 702 falls off from the nozzle outer sleeve 701 after assembly or use, ensuring the reliability of the nozzle valve.

[0022] As a preferred embodiment, a second through hole 301 is axially provided in the valve core 3. A gas guide nut 13 is coaxially screwed on the valve core 3 and is in communication with a gas guide hole 1301 and a receiving hole 1302. The second through hole 301 is coaxial with the receiving hole 1302 and is adapted to the outer diameter of the lower part of the guide rod 703. The cross-sectional area of the gas guide hole 1301 is smaller than the area of the gap 704. A third sealing ring 17 is installed between the adjacent surfaces of the second through hole 301 and the receiving hole 1302. When a fire occurs, an external force generated by manually pressing the lever or the electromagnet pushes the gas nozzle push rod 702 downward to drive the second sealing ring 16 and the guide rod 703 to move downward, so that the second sealing ring 16 is away from the lower end surface of the gas nozzle outer sleeve 701. At this time, the upper part of the valve core 3 is in communication with the atmosphere through the gap 704, and the upper part of the valve core 3 (i.e., the upper cavity) is depressurized. The valve core 3 moves upward under the push of the high-pressure fire extinguishing gas in the steel cylinder. At this time, the bottle head valve is opened for fire extinguishing operations. At the same time, the lower end of the guide rod 703 is inserted into the second through hole 301, the receiving hole 1302 and the third sealing ring 17, and the third sealing ring 17 is tightly wrapped around the guide rod 703. When the fire extinguishing gas is exhausted, under the action of the spring 4 and the self-weight of the valve core 3, the valve core 3 has a tendency to automatically move downward and reset. At this time, the lower end of the flange portion 7012 abuts against the bottom of the stepped hole 501 to prevent the gas nozzle outer sleeve 701 from moving downward. Since the lower end of the pressing cap 705 installed at the upper end of the gas nozzle push rod 702 is also limited by the bottom of the receiving cavity 7011, the gas nozzle push rod 702 and the guide rod 703 will not move downward, thereby stabilizing the valve core 3 in the open position and preventing the valve core 3 from moving downward and resetting to close the bottle head valve. When refilling the fire extinguishing gas into the used steel cylinder, the fire extinguishing gas enters the receiving hole 1302 through the gas guide hole 1301. As the pressure of the fire extinguishing gas in the steel cylinder increases, under the action of the pressure difference, the lower end of the guide rod 703 sleeved in the third sealing ring 17 acts as a piston to push the guide rod 703 upward. At this time, due to the frictional force of the first sealing ring 15, the gas nozzle push rod 702 connected to the guide rod 703 first moves upward and the second sealing ring 16 seals the surface of the gap 704, disconnecting the upper part of the valve core 3 from the atmosphere. When the guide rod 703 finally disengages from the second through hole 301, the fire extinguishing gas continues to enter the upper part of the valve core 3 (i.e., the upper cavity), continuing to push the guide rod 703, the gas nozzle push rod 702 and the gas nozzle outer sleeve 701 upward until the upper end surface of the flange portion 7012 of the gas nozzle outer sleeve 701 abuts against the lower end of the connecting nut 6. At this time, the push rod assembly 7 is reset. After the fire extinguishing gas is filled, the fire extinguishing gas that continues to enter the upper part of the valve core 3 from the gas guide hole 1301 makes the pressure in the upper and lower parts of the valve core 3 balanced. At the moment when the filling pressure is removed, there is an instantaneous decrease in the pressure under the valve core 3. At this time, the valve core 3 quickly moves downward and resets under the action of the upper pressure and the spring 4, closing the bottle head valve, which is convenient to operate.

[0023] Further preferably, the valve body 1 is circumferentially and spacedly provided with a pressure gauge interface 8, a pressure relief interface 19, and a pressure sensor interface 20 below the spraying interface 2. A pressure gauge 9 is installed at the pressure gauge interface 8, a pressure relief plug 10 and a safety diaphragm 11 are installed at the pressure relief interface 19, and a pressure sensor 12 is installed in the pressure sensor interface 20. The safety diaphragm is provided to automatically relieve pressure when the pressure in the cylinder exceeds the set safety limit. The installed pressure gauge facilitates daily maintenance inspections. The installed pressure sensor helps to achieve automated monitoring, improve the automation level of the inspection of the fire extinguishing equipment, and has good safety and reliability.

[0024] Further preferably, a buffer pad 14 is also installed at the lower end of the valve cover 5. In this way, there is a buffer when the valve core 3 moves upward to the top, avoiding impact noise at the moment of opening and preventing the impact force when the valve core 3 moves upward from damaging the valve cover 5, thus improving the safety and reliability of the bottle head valve.

[0025] As a preferred embodiment, a first stepped stage 302, a second stepped stage 303, and a third stepped stage 304 are coaxially and sequentially connected to the outer circumferential surface of the lower end of the valve core 3. A pressure sleeve 23 is sleeved on the first stepped stage 302. The inner wall of the pressure sleeve 23 and the inner flange 2301 at its lower end clamp the fourth sealing ring 21 on the second stepped stage 303. The sealing port ring 101 includes an outer conical surface 103. An arc surface 102 for contact and cooperation with the inner lower surface of the fourth sealing ring 21 is provided between the upper end surface of the sealing port ring 101 and the outer conical surface 103. When the fourth sealing ring 21 contacts the arc surface 102, at least a part of the third stepped stage 304 extends into the inner wall of the sealing port ring 101 and the third stepped stage 304 and the inner wall of the sealing port ring 101 are in sliding fit. Here, the ideal sliding fit is a non-gap sliding fit. Due to machining errors, there may be a case of gap sliding fit. When the bottle head valve is closed, at least a part of the third stepped stage extends into the inner wall of the sealing port ring and the two are in sliding fit, forming a preliminary seal. And the sealing pair formed by the inner lower surface of the fourth sealing ring and the arc surface. In this way, the flow rate of the sealed gas entering the sealing pair is greatly reduced. At the same time, in this structure, the pressure exerted by the sealed gas on the fourth sealing ring can be decomposed into a thrust to push the valve core upward to open the bottle head valve and a horizontal thrust to deform the fourth sealing ring outward. Since the outside of the fourth sealing ring is restricted by the inner wall and the inner flange of the pressure sleeve, the fourth sealing ring can only deform downward. This deformation makes the joint between the fourth sealing ring and the arc surface of the sealing port ring fit more tightly. That is, the present technical solution creatively proposes a new sealing structure, significantly improving the sealing effect of the bottle head valve and ensuring the reliability of the bottle head valve.

[0026] Further preferably, a fifth sealing ring 22 is installed on the outer wall of the upper end of the valve core 3 to prevent leakage between the upper part of the valve core 3 (i.e., the upper cavity) and the spraying interface 2. There is a spacing L between the third stage 304 and the inner flange 2301 to accommodate the sealing mouth ring 101, so as to avoid mechanical interference and ensure the sealing effect. The specific value of the spacing L can be determined according to the taper of the outer conical surface 103 and the arc size of the arc surface 102.

[0027] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation of the present invention.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reusable opening and closing perfluoroketone bottle head valve, comprising a valve body (1). A steel cylinder interface (18) is provided at the lower end of the valve body (1), a spraying interface (2) is provided on one side, and a valve cover (5) is installed at the upper end. A valve core (3) is provided in the valve body (1) for cooperating with a sealing mouth ring (101) to connect or disconnect the steel cylinder interface (18) and the spraying interface (2). A spring (4) is provided between the valve core (3) and the valve cover (5), and it is characterized in that: A connecting nut (6) is screwed onto the upper end of the valve cover (5). A stepped hole (501) and a first through hole (502) are coaxially communicated on the valve cover (5). A starting ejector rod assembly (7) is slidably installed in the stepped hole (501). The starting ejector rod assembly (7) includes a nozzle outer sleeve (701) and a nozzle ejector rod (702) installed in the nozzle outer sleeve (701). The flange portion (7012) of the nozzle outer sleeve (701) is in sealed sliding fit with the inner wall of the stepped hole (501). A guide rod (703) is connected to the lower end of the nozzle ejector rod (702). A gap (704) is provided between the inner wall of the nozzle outer sleeve (701) and the outer circumferential surface of the nozzle ejector rod (702). A second sealing ring (16) is installed at the upper end surface of the guide rod (703) of the nozzle ejector rod (702) to seal the lower end of the gap (704). When the nozzle ejector rod (702) is pushed downward by an external force to make the second sealing ring (16) away from the lower end surface of the nozzle outer sleeve (701), the upper part of the valve core (3) is communicated with the atmosphere, and the valve core (3) moves upward to open and maintain the open state. A driving part interface (601) is provided at the upper end of the connecting nut (6); A first stepped stage (302), a second stepped stage (303), and a third stepped stage (304) are coaxially and sequentially connected to the outer circumferential surface of the lower end of the valve core (3). A pressure sleeve (23) is sleeved on the first stepped stage (302). The inner wall of the pressure sleeve (23) and the inner flange (2301) at its lower end clamp the fourth sealing ring (21) on the second stepped stage (303). The sealing port ring (101) includes an outer conical surface (103). An arc surface (102) for contact and cooperation with the inner lower side surface of the fourth sealing ring (21) is provided between the upper end surface of the sealing port ring (101) and the outer conical surface (103). When the fourth sealing ring (21) contacts the arc surface (102), at least a part of the third stepped stage (304) extends into the inner wall of the sealing port ring (101), and the third stepped stage (304) is in sliding fit with the inner wall of the sealing port ring (101).

2. The reusable opening and closing perfluoroketone bottle head valve according to claim 1, characterized in that: An accommodation cavity (7011) is further provided in the upper part of the nozzle outer sleeve (701). A pressure cap (705) is installed at the upper end of the nozzle ejector rod (702). The pressure cap (705) is located in the accommodation cavity (7011) and is in clearance fit with the accommodation cavity (7011).

3. The reusable opening and closing perfluoropentanone nozzle valve according to claim 2, characterized in that: The valve core (3) is axially provided with a second through hole (301). A gas guide nut (13) is coaxially screwed on the valve core (3) and is in alignment with the second through hole (301). The gas guide nut (13) is provided with a gas guide hole (1301) and a receiving hole (1302) in communication. The second through hole (301) is coaxial with the receiving hole (1302) and is adapted to the outer diameter of the lower part of the guide rod (703). The cross-sectional area of the gas guide hole (1301) is smaller than the area of the gap (704). A third sealing ring (17) is installed between the adjacent port surfaces of the second through hole (301) and the receiving hole (1302).

4. The reusable opening and closing perfluoroketone bottle head valve according to claim 3, wherein: The valve body (1) is circumferentially and spacedly provided with a pressure gauge interface (8), a pressure relief interface (19), and a pressure sensor interface (20) below the spraying interface (2). A pressure gauge (9) is installed at the pressure gauge interface (8). A pressure relief plug (10) and a safety diaphragm (11) are installed at the pressure relief interface (19). A pressure sensor (12) is installed in the pressure sensor interface (20).

5. The fully fluorinated hexanone bottle head valve capable of repeated opening and closing according to claim 4, characterized in that: A buffer pad (14) is further installed at the lower end of the valve cover (5).

6. The fully fluorinated hexanone bottle head valve according to claim 5, wherein: A first sealing ring (15) is sleeved on the outer circumference of the flange part (7012) of the gas nozzle outer sleeve (701).

7. A reusable opening and closing perfluoropentanone bottle head valve according to claim 1, characterized in that: A fifth sealing ring (22) is installed on the outer wall of the upper end of the valve core (3). There is a distance L for the sealing port ring (101) to extend between the third stage (304) and the inner flange (2301).

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