Pressure-adjustable fire-retardant breather valve

Abstract

The utility model relates to the technical field of breather valves, and discloses a pressure-adjustable fire-retardant breather valve which comprises a valve body, a valve cover is installed at the top end of the valve body, a breathing tube penetrates through one side of the valve body, a fire-retardant plate is installed in an outer end opening of the breathing tube, and a rain-shielding cap is installed at the outer end of the breathing tube. And the rain shielding cap and the fire retardant plate are fixed through a connecting rod. The compression length of the first spring is adjusted through the effect of the first adjusting assembly and the screwing depth of the screwing sleeve, then the pressure of the negative pressure valve disc is adjusted, due to the fact that the pressing ring is located outside the valve body, the pressure can be directly adjusted from the outside, and in cooperation with the effect of the adjusting rod, the pressure can be directly adjusted. The compression depth of the second spring can be screwed and adjusted from the outside, so that the pressure of the positive pressure valve disc can be adjusted, the two adjusting modes can be carried out synchronously and can also be adjusted independently, and the flexibility and convenience of pressure adjustment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of breathing valves, in particular to a pressure-adjustable fire-retardant breathing valve. Background Art

[0002] The breathing valve has the function of releasing both positive and negative pressure. Specifically, when the container is under a certain positive pressure, the breathing valve will open to release the exhaled gas to release the positive pressure; when the container is under negative pressure, the breathing valve will open to release the inhaled gas to release the negative pressure, thus ensuring that the pressure is within a certain range, thereby ensuring the safety of the container;

[0003] Chinese Patent Authorization Publication No. CN 220168676 U discloses a pressure-adjustable fire-stop breathing valve, comprising an outer cylinder, an upper sealing cavity provided at the top of the inner portion of the outer cylinder, and a lower sealing cavity provided at the bottom of the inner portion of the outer cylinder. The upper and lower sealing cavities are staggered, and the elastic force of the regulating spring can be adjusted by means of the upper and lower cover plates. The regulating spring can also be used to adjust the pressure applied to the intake and exhalation valve covers, thereby simplifying operation and improving practicality and reliability. The above-mentioned prior art solution has the following shortcomings: when adjusting the pressure, the device requires rotating the corresponding upper cover plates on the intake and exhalation valve covers to adjust the elastic force of the regulating springs at the corresponding positions. However, during this rotation process, since the upper cover plates are located within the upper and lower sealing cavities, the entire breathing valve must be disassembled before the entire adjustment process can be performed. This means that the regulating spring inside the breathing valve cannot be adjusted from the outside at any time, thus leaving room for improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure-adjustable fire-stop breathing valve to solve the problem in the prior art that it is difficult to adjust the internal valve disc pressure from the outside of the existing fire-stop breathing valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure-adjustable fire-stop breathing valve, comprising a valve body, a valve cover installed on the top of the valve body, a breathing tube passing through one side of the valve body, a fire-stop plate installed in the outer end of the breathing tube, a rain shield installed on the outer end of the breathing tube, and the rain shield and the fire-stop plate are fixed by a connecting rod, the inner end of the breathing tube extends to the interior of the valve body, and an exhalation port is opened at the bottom end of the breathing tube located inside the valve body, an inhalation port is opened at the top end of the breathing tube above the exhalation port, and the center of the valve cover above the inhalation port is fixed to the inner end of the breathing tube. A fixed sleeve is passed through, and an adjusting component 1 is provided inside the fixed sleeve, and an adjusting rod is passed through the inside of the adjusting component 1. The bottom end of the adjusting rod passes through the suction port and the exhalation port in sequence, and the outside of the adjusting rod is respectively sleeved with a negative pressure valve disc and a positive pressure valve disc, and the negative pressure valve disc is located at the top of the suction port, and the positive pressure valve disc is located at the top of the exhalation port. A guide sleeve 2 is installed on the top of the negative pressure valve disc, and the top of the guide sleeve 2 passes through the interior of the fixed sleeve, a guide sleeve 1 is installed on the top of the positive pressure valve disc, and an adjusting component 2 is provided on the outside of the adjusting rod above the guide sleeve 1.

[0006] Preferably, the adjustment component 1 includes a screw sleeve mounted inside the fixed sleeve, and a pressure ring is installed at the top of the screw sleeve, and a spring 1 is installed at the bottom end of the screw sleeve, and the bottom end of the spring 1 is connected to the top of the guide sleeve 2.

[0007] Preferably, threads are provided on both the inner and outer sides of the screw sleeve, the screw sleeve is threadedly connected to the interior of the fixing sleeve via the external threads, and the screw sleeve is threadedly connected to the upper end of the adjusting rod via the internal threads.

[0008] Preferably, connecting components are provided at the four corners of the inner wall of one end of the breathing tube close to the fire barrier, and the inner sides of the four connecting components are connected to connecting hoop, and a plastic bag is embedded in the interior of the connecting hoop.

[0009] Preferably, the outer diameter of the connecting hoop is smaller than the inner diameter of the breathing tube, and the interior of the plastic bag is filled with dry powder.

[0010] Preferably, the connecting assembly includes a fixed pull ring welded to the inner wall of the breathing tube, a steel wire is connected to the inner side of the outer wall of the connecting hoop, and one end of the steel wire passes through the interior of the fixed pull ring and is connected to the connecting ring, a welding wire passes through the interior of the connecting ring, and one end of the welding wire is welded to the outer side of the outer wall of the connecting hoop, and the other end of the welding wire is bent and abuts against the outer wall of the connecting hoop.

[0011] Preferably, the outer diameter of the welding wire is smaller than the inner diameter of the connecting ring, and the bent end of the welding wire is in a circular ring shape to prevent the connecting ring from detaching.

[0012] Preferably, the second adjustment component includes a fixed ring mounted on the outside of the adjustment rod, and the fixed ring is located between the negative pressure valve disc and the positive pressure valve disc. A second spring is installed at the bottom end of the fixed ring, and the bottom end of the second spring is connected to the top of the positive pressure valve disc.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) Through the action of the adjusting component 1, the screwing depth of the screw sleeve is utilized to adjust the compression length of the spring 1, thereby realizing the adjustment of the pressure of the negative pressure valve disc. Since the pressure ring is located outside the valve body, the pressure can be directly adjusted from the outside. In conjunction with the action of the adjusting rod, the compression depth of the spring 2 can be adjusted from the outside, thereby adjusting the pressure of the positive pressure valve disc. The two adjustment methods can be carried out simultaneously and can also be adjusted separately, thereby improving the flexibility and convenience of pressure adjustment and reducing the steps of disassembling the valve body.

[0015] (2) Through the action of the plastic bag, when a fire occurs outside and the open flame passes through the breathing tube, the plastic bag dissolves to automatically release the dry powder to achieve a certain fire extinguishing effect, thereby slowing down the influx of the open flame. In combination with the fireproof performance of the fire-blocking plate, the fire-blocking performance of the breathing valve is further improved. Moreover, since the connecting assembly is detachable, the plastic bag can be easily replaced and used regularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the valve body of the present invention;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the breathing tube of the present invention;

[0020] Figure 4 This is a schematic diagram of the plastic bag structure of the present utility model;

[0021] Figure 5 This is a schematic diagram of the steel wire distribution three-dimensional structure of the present utility model.

[0022] Explanation of the reference numerals in the figure: 1. Valve body; 2. Breathing tube; 3. Rain shield; 4. Valve cover; 5. Fixing sleeve; 6. Adjusting rod; 7. Adjusting assembly one; 701. Screw sleeve; 702. Pressure ring; 703. Spring one; 8. Adjusting assembly two; 801. Fixing ring; 802. Spring two; 9. Exhalation port; 10. Inhalation port; 11. Positive pressure valve disc; 12. Negative pressure valve disc; 13. Guide sleeve one; 14. Guide sleeve two; 15. Fire arrester; 16. Connecting assembly; 1601. Fixing pull ring; 1602. Steel wire; 1603. Connecting ring; 1604. Welding wire; 17. Connecting hoop; 18. Plastic bag. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 5 The utility model provides an embodiment: a pressure-adjustable fire-stop breathing valve, comprising a valve body 1, a valve cover 4 is installed on the top of the valve body 1, and a breathing tube 2 is passed through one side of the valve body 1;

[0025] Connecting components 16 are provided at the four corners of the inner wall of the end of the breathing tube 2 close to the fire barrier 15, and the inner sides of the four connecting components 16 are connected to connecting hoops 17, and the interior of the connecting hoops 17 is embedded with a plastic bag 18;

[0026] The outer diameter of the connecting hoop 17 is smaller than the inner diameter of the breathing tube 2, and the interior of the plastic bag 18 is filled with dry powder;

[0027] The connecting assembly 16 includes a fixed pull ring 1601 welded to the inner wall of the breathing tube 2. A steel wire 1602 is connected to the inner side of the outer wall of the connecting hoop 17. One end of the steel wire 1602 passes through the interior of the fixed pull ring 1601 and is connected to a connecting ring 1603. A welding wire 1604 passes through the interior of the connecting ring 1603. One end of the welding wire 1604 is welded to the outer side of the outer wall of the connecting hoop 17. The other end of the welding wire 1604 is bent and abuts against the outer wall of the connecting hoop 17.

[0028] The outer diameter of the welding wire 1604 is smaller than the inner diameter of the connecting ring 1603, and the bent end of the welding wire 1604 is in a circular ring shape to prevent the connecting ring 1603 from detaching;

[0029] Specifically, such as Figure 1 、 Figure 4 and Figure 5As shown, the plastic bag 18 is dissolved during use to automatically release the dry powder when facing an open flame, and the detachability of the connecting assembly 16 is utilized to facilitate replacement of the plastic bag 18;

[0030] A fire blocker 15 is installed in the outer end of the breathing tube 2, a rain cap 3 is installed at the outer end of the breathing tube 2, and the rain cap 3 and the fire blocker 15 are fixed by a connecting rod. The inner end of the breathing tube 2 extends to the interior of the valve body 1, and an exhalation port 9 is opened at the bottom end of the breathing tube 2 located inside the valve body 1, and an inhalation port 10 is opened at the top end of the breathing tube 2 above the exhalation port 9, and a fixing sleeve 5 is passed through the center of the valve cover 4 above the inhalation port 10, and an adjustment component 7 is passed through the interior of the fixing sleeve 5;

[0031] The adjustment component 1 7 includes a screw sleeve 701 mounted inside the fixed sleeve 5, with a pressure ring 702 mounted on the top of the screw sleeve 701, and a spring 1 703 mounted on the bottom of the screw sleeve 701, and the bottom end of the spring 1 703 is connected to the top of the guide sleeve 2 14;

[0032] The inner and outer sides of the screw sleeve 701 are both provided with threads. The screw sleeve 701 is threadedly connected to the inner part of the fixed sleeve 5 through the external threads, and the screw sleeve 701 is threadedly connected to the outer part of the adjusting rod 6 through the internal threads.

[0033] The interior of the adjusting component 7 is penetrated by an adjusting rod 6, the bottom end of the adjusting rod 6 sequentially penetrates the suction port 10 and the exhalation port 9, and the outside of the adjusting rod 6 is respectively sleeved with a negative pressure valve disc 12 and a positive pressure valve disc 11, and the negative pressure valve disc 12 is located at the top of the suction port 10, and the positive pressure valve disc 11 is located at the top of the exhalation port 9. The top of the negative pressure valve disc 12 is installed with a guide sleeve 2 14, and the top of the guide sleeve 2 14 penetrates into the interior of the fixed sleeve 5, the top of the positive pressure valve disc 11 is installed with a guide sleeve 13, and the outer side of the adjusting rod 6 above the guide sleeve 13 is provided with an adjusting component 2 8;

[0034] The second adjustment component 8 includes a fixed ring 801 mounted on the outside of the adjustment rod 6, and the fixed ring 801 is located between the negative pressure valve disc 12 and the positive pressure valve disc 11. The bottom end of the fixed ring 801 is installed with a second spring 802, and the bottom end of the second spring 802 is connected to the top of the positive pressure valve disc 11;

[0035] Specifically, such as Figure 1 、 Figure 2 and Figure 3 As shown, when in use, the screw sleeve 701 and the adjusting rod 6 are screwed respectively, and then the compression depths of the spring 1 703 and the spring 2 802 are adjusted respectively, thereby changing the pressure levels of the negative pressure valve disc 12 and the positive pressure valve disc 11.

[0036] Working principle: When the utility model is in use, first, when the internal pressure of the storage tank is too high, the space inside the valve body 1 is used to relieve the overpressure. When the pressure continues to rise, it generates an upward force on the positive pressure valve disc 11, compressing the spring 2 802, thereby opening the exhalation port 9 and making the breathing tube 2 communicate with the interior of the valve body 1 to achieve the effect of internal and external pressure balance. When the internal pressure of the storage tank is low, the external pressure is strong, causing the negative pressure valve disc 12 to be subjected to an upward force, thereby opening the suction port 10 and making the breathing tube 2 communicate with the interior of the valve body 1 to achieve uniform pressure. The fireproof property of the fire barrier 15 is used to isolate the external open flame from entering.

[0037] Secondly, by screwing the pressure ring 702, the screwing sleeve 701 moves downward or upward along the fixed sleeve 5, thereby reducing or increasing the distance between the spring 1 703 and the guide sleeve 2 14, thereby reducing or increasing the compression distance of the spring 1 703, thereby increasing the downward pressure on the negative pressure valve disc 12, and realizing the adjustment effect. Moreover, due to the descent of the screwing sleeve 701, the adjusting rod 6 is driven to descend synchronously, thereby reducing the distance between the fixing ring 801 and the positive pressure valve disc 11, thereby increasing the pressure on the positive pressure valve disc 11. By pressing the pressure ring 702 and screwing the adjusting rod 6 to change the relative position between the adjusting rod 6 and the fixing sleeve 5, the compression amount of the spring 2 802 can be adjusted to adjust the pressure on the positive pressure valve disc 11.

[0038] Finally, when an open flame is poured into the breathing tube 2, the open flame passes through the plastic bag 18, causing the plastic bag 18 to dissolve, thereby leaking the dry powder, thereby achieving a certain fire extinguishing effect and slowing down the spread of the open flame. By straightening the bent end of the welding wire 1604, it is convenient to remove the connecting ring 1603 from the welding wire 1604, and then it is convenient to separate the fixed pull ring 1601 from the steel wire 1602, and the plastic bag 18 can be disassembled and replaced.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pressure-adjustable fire-stop breathing valve, comprising a valve body (1), characterized in that: A valve cover (4) is installed at the top of the valve body (1), a breathing tube (2) is passed through one side of the valve body (1), and a fire blocker (15) is installed in the outer end of the breathing tube (2), a rain cap (3) is installed at the outer end of the breathing tube (2), and the rain cap (3) and the fire blocker (15) are fixed by a connecting rod, the inner end of the breathing tube (2) extends to the inside of the valve body (1), and an exhalation port (9) is provided at the bottom end of the breathing tube (2) located inside the valve body (1), an inhalation port (10) is provided at the top of the breathing tube (2) above the exhalation port (9), and a fixing sleeve (5) is passed through the center of the valve cover (4) above the inhalation port (10), and an adjusting component is provided inside the fixing sleeve (5). One (7), and an adjusting rod (6) is passed through the interior of the adjusting component one (7), the bottom end of the adjusting rod (6) passes through the suction port (10) and the exhalation port (9) in sequence, and the outside of the adjusting rod (6) is respectively provided with a negative pressure valve disc (12) and a positive pressure valve disc (11), and the negative pressure valve disc (12) is located at the top end of the suction port (10), and the positive pressure valve disc (11) is located at the top end of the exhalation port (9), the top end of the negative pressure valve disc (12) is installed with a guide sleeve two (14), and the top end of the guide sleeve two (14) passes through the interior of the fixed sleeve (5), the top end of the positive pressure valve disc (11) is installed with a guide sleeve one (13), and an adjusting component two (8) is provided on the outside of the adjusting rod (6) above the guide sleeve one (13).

2. The pressure-adjustable fire-stop breathing valve according to claim 1, characterized in that: The adjusting component 1 (7) includes a screw sleeve (701) sleeved inside the fixed sleeve (5), and a pressure ring (702) is installed at the top end of the screw sleeve (701), and a spring 1 (703) is installed at the bottom end of the screw sleeve (701), and the bottom end of the spring 1 (703) is connected to the top end of the guide sleeve 2 (14).

3. The pressure-adjustable fire-stop breathing valve according to claim 2, characterized in that: The inner and outer sides of the screw sleeve (701) are both provided with threads, and the screw sleeve (701) is threadedly connected to the interior of the fixing sleeve (5) through the external threads, and the screw sleeve (701) is threadedly connected to the upper end of the adjusting rod (6) through the internal threads.

4. The pressure-adjustable fire-stop breathing valve according to claim 1, characterized in that: The four corners of the inner wall of one end of the breathing tube (2) close to the fire-blocking plate (15) are all provided with connecting components (16), and the inner sides of the four connecting components (16) are connected with connecting hoops (17), and the interior of the connecting hoops (17) is embedded with a plastic bag (18).

5. The pressure-adjustable fire-stop breathing valve according to claim 4 is characterized in that: The outer diameter of the connecting hoop (17) is smaller than the inner diameter of the breathing tube (2), and the interior of the plastic bag (18) is filled with dry powder.

6. The pressure-adjustable fire-stop breathing valve according to claim 4, characterized in that: The connecting assembly (16) includes a fixed pull ring (1601) welded to the inner wall of the breathing tube (2), a steel wire (1602) is connected to the inner side of the outer wall of the connecting hoop (17), and one end of the steel wire (1602) passes through the interior of the fixed pull ring (1601) and is connected to the connecting ring (1603), a welding wire (1604) passes through the interior of the connecting ring (1603), and one end of the welding wire (1604) is welded to the outer side of the outer wall of the connecting hoop (17), and the other end of the welding wire (1604) is bent and abuts against the outer wall of the connecting hoop (17).

7. The pressure-adjustable fire-stop breathing valve according to claim 6, characterized in that: The outer diameter of the welding wire (1604) is smaller than the inner diameter of the connecting ring (1603), and the bent end of the welding wire (1604) is in a circular ring shape to prevent the connecting ring (1603) from detaching.

8. The pressure-adjustable fire-stop breathing valve according to claim 6, characterized in that: The regulating assembly 2 (8) includes a fixed ring (801) sleeved on the outside of the regulating rod (6), and the fixed ring (801) is located between the negative pressure valve disc (12) and the positive pressure valve disc (11), and a spring 2 (802) is installed at the bottom end of the fixed ring (801), and the bottom end of the spring 2 (802) is connected to the top end of the positive pressure valve disc (11).

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