Mounting structure for pressure indicator of fire extinguisher

Abstract

The utility model relates to the field of valve structures, in particular to a fire extinguisher pressure indicator installation structure which comprises a valve body, a pressure indicator is connected to the valve body, a core body is arranged in the valve body, a communicating hole is formed in the core body in a penetrating mode, a sliding rod is arranged in the communicating hole, one end of the sliding rod penetrates out of one end of the core body, and the other end of the sliding rod penetrates out of the other end of the core body. One end of the sliding rod penetrates through the core body, the other end of the sliding rod penetrates out of the other end of the core body, a sealing piece is arranged at the end, outside the core body, of the sliding rod, and a reset assembly connected with the sliding rod is arranged in the core body. The reset assembly comprises an elastic piece and a limiting step, the sliding rod penetrates through the elastic piece, the limiting step is arranged on the inner wall of the core body, and a pressing block is arranged on the side wall, in the core body, of the sliding rod. The utility model has the effect of avoiding gas leakage in the fire extinguisher bottle as much as possible in the process of replacing the pressure indicator.

Description

Technical Field

[0001] The utility model relates to the field of valve structures, in particular to a fire extinguisher pressure indicator installation structure. Background Art

[0002] Whether it is a portable fire extinguisher or a trolley-type fire extinguisher, a valve is provided on the top of the fire extinguisher, and the valve is connected to a pressure indicator that can display the pressure inside the fire extinguisher.

[0003] In order for the pressure indicator to work, it must be connected to the fire extinguisher so that the air pressure in the fire extinguisher can act on the detection end of the pressure indicator. However, when the pressure indicator fails and needs to be replaced, the high-pressure gas in the fire extinguisher bottle causes the gas in the fire extinguisher bottle to leak out during the removal of the pressure indicator. In order to ensure that the fire extinguisher can be used normally after replacing the pressure indicator, it is necessary to re-pressurize the fire extinguisher bottle. Utility Model Content

[0004] In order to avoid as much as possible the gas leakage in the fire extinguisher bottle during the process of replacing the pressure indicator, the utility model provides a fire extinguisher pressure indicator installation structure.

[0005] The utility model provides a fire extinguisher pressure indicator installation structure, which adopts the following technical solutions:

[0006] A fire extinguisher pressure indicator mounting structure comprises a valve body, to which a pressure indicator is connected, a core body is arranged in the valve body, a connecting hole is passed through the core body, a sliding rod is arranged in the connecting hole, one end of the sliding rod passes through one end of the core body, and the other end passes through the other end of the core body, a sealing sheet is arranged at one end of the sliding rod outside the core body, and a reset assembly connected to the sliding rod is arranged in the core body.

[0007] In a specific possible implementation scheme, the reset assembly includes an elastic member and a limiting step, the sliding rod passes through the elastic member, the limiting step is arranged on the inner wall of the core body, and the sliding rod is provided with a pressure block on the side wall inside the core body.

[0008] In a specific possible implementation manner, a sealing ring is provided on the outer wall of the core.

[0009] In a specific possible implementation manner, the diameter of the sliding rod is smaller than the diameter of the air inlet hole at the detection end of the pressure indicator.

[0010] In a specific possible implementation manner, a stopper is provided at one end of the sliding rod away from the sealing sheet.

[0011] In a specific possible implementation manner, the length of the stopper is greater than the radius of the air inlet hole at the detection end of the pressure indicator.

[0012] In a specific possible implementation manner, a limiting plate is provided at one end of the sliding rod close to the sealing plate, the limiting plate is arranged on a side of the sealing plate away from the core body, and a retaining ring is provided on the circumferential surface of the limiting plate.

[0013] In a specific possible implementation manner, the detection end of the pressure indicator is provided with a communication groove, and the communication groove is communicated with the air inlet hole of the detection end of the pressure indicator.

[0014] In a specific possible implementation manner, the sealing sheet is provided with a slot for the core to be inserted into.

[0015] In a specific embodiment, threads are provided on the outer wall of the core.

[0016] In summary, the present invention includes at least one of the following beneficial technical effects:

[0017] 1. Set the core body in the hole of the valve body for installing the pressure indicator. Under normal conditions, the sealing sheet seals the opening of the core body to prevent the gas in the fire extinguisher bottle from flowing out. When the pressure indicator is installed in the valve body, the end face of the pressure indicator abuts the sliding rod and pushes the sliding rod to slide in the core body, thereby causing the sealing sheet to slide away from the core body, and the gas in the fire extinguisher bottle flows into the pressure indicator, so that the pressure indicator can detect the air pressure in the fire extinguisher bottle. When the pressure indicator is removed, the reset assembly resets the sliding rod, and the sealing sheet re-seals the opening of the core body, preventing the continuous leakage of the gas in the fire extinguisher bottle.

[0018] 2. The setting of the block prevents the sliding rod from entering the air inlet hole at the detection end of the pressure indicator, thereby ensuring that the gas in the fire extinguisher bottle can smoothly enter the pressure indicator, ensuring the accuracy of the pressure indicator in detecting the pressure in the fire extinguishing gas cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure.

[0020] Figure 2 It is a schematic diagram of the connection relationship between the core body and the pressure indicator in Example 1.

[0021] Figure 3 It is a schematic diagram of the overall structure of the core body in Example 1.

[0022] Figure 4 It is a cross-sectional view showing the internal structure of the core in Example 1.

[0023] Figure 5It is a schematic diagram of the connection relationship between the core body and the pressure indicator in Example 2.

[0024] Figure 6 It is a schematic diagram of the overall structure of the core body in Example 2.

[0025] Explanation of the accompanying drawings: 1. valve body; 2. pressure indicator; 3. connecting groove; 4. core body; 5. sliding rod; 6. reset assembly; 61. pressure block; 62. spring; 63. limiting step; 7. sealing ring; 8. retaining ring; 9. sealing plate; 10. connecting hole; 11. slot; 12. stop block; 13. limiting plate. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 The utility model is described in further detail.

[0027] Embodiment 1:

[0028] Reference Figure 1 The fire extinguisher pressure indicator installation structure comprises a valve body 1 , the valve body 1 is connected with a pressure indicator 2 , and a detection end of the pressure indicator 2 is arranged in the valve body 1 .

[0029] Reference Figure 2 , Figure 3 and Figure 4 The valve body 1 is provided with a core body 4, which is approximately cylindrical in shape as a whole. A connecting hole 10 is passed through the core body 4, and the axis of the connecting hole 10 is colinear with the axis of the core body 4. A sliding rod 5 is provided in the connecting hole 10, and there is a gap for gas flow between the sliding rod 5 and the connecting hole 10. The sliding rod 5 and the connecting hole 10 are coaxially arranged. A limiting plate 13 is fixed to one end of the sliding rod 5 outside the core body 4, and a retaining ring 8 is integrally formed on the circumferential surface of the limiting plate 13. A sealing plate 9 is fixed in the retaining ring 8. The sealing plate 9 is arranged on the side of the limiting plate 13 facing the core body 4. The sliding rod 5 passes through the sealing plate 9. During the sliding process of the sliding rod 5, the sealing plate 9 can be carried along with the sliding rod 5. A card slot 11 is provided on the side of the sealing plate 9 facing the core body 4.

[0030] Under normal conditions, the core 4 is arranged in the hole of the valve body 1 for installing the pressure indicator 2, and one end of the core 4 close to the sealing sheet 9 faces the inside of the fire extinguisher bottle, and the other end faces the outside of the fire extinguisher bottle. The end of the core 4 close to the sealing sheet 9 is clamped in the card slot 11, and the sealing sheet 9 seals the opening of the core 4. Since the inside of the fire extinguisher bottle is a positive pressure environment, the air pressure can apply a thrust to the sealing sheet 9, so that the sealing sheet 9 is tightly abutted against the core 4, thereby improving the sealing effect of the opening of the core 4. When the sliding rod 5 receives an external force and slides into the fire extinguisher bottle, the sealing sheet 9 slides away from the core 4. At this time, the gas in the fire extinguishing gas cylinder can flow out of the fire extinguisher bottle from the gap between the sliding rod 5 and the inner wall of the core 4.

[0031] A reset assembly 6 is provided in the core body 4, and the reset assembly 6 includes a spring 62 and a limit step 63. The limit step 63 is integrally formed on the inner wall of the core body 4, and the spring 62 is sleeved on the sliding rod 5. A pressure block 61 is fixed on the side wall of the sliding rod 5. One end of the spring 62 is connected to the limit step 63, and the other end is connected to the pressure block 61. When the sliding rod 5 slides into the fire extinguisher bottle, the pressure block 61 squeezes the spring 62, so that the spring 62 is compressed; when the sliding rod 5 loses the pressure on the spring 62, the spring 62 rebounds and pushes the sliding rod 5 to reset. It can be understood that the spring 62 can also be replaced by an elastically deformable element such as a rubber block, which is not limited here.

[0032] The outer wall of the core body 4 is provided with threads, so that the core body 4 can be threadedly connected with the valve body 1, and a sealing ring 7 is fixed on the outer wall of the core body 4. The sealing ring 7 seals the gap between the core body 4 and the valve body 1. The threads not only make the core body 4 and the valve body 1 fixedly connected, but also play a sealing role, thereby avoiding the possibility of gas in the fire extinguishing gas cylinder leaking from the gap between the core body 4 and the valve body 1 as much as possible.

[0033] A connecting groove 3 is provided on the surface of the detection end of the pressure indicator 2 facing the core body 4, and the connecting groove 3 is connected to the air inlet hole of the detection end of the pressure indicator 2. The diameter of the sliding rod 5 is larger than the width of the connecting groove 3 or the diameter of the air inlet hole. It can be understood that a cushion block meeting the conditions can also be fixed on the end of the sliding rod 5 facing the pressure indicator 2, as long as the sliding rod 5 cannot enter the air inlet hole of the detection end of the pressure indicator 2 and does not block the connecting groove 3 and the air inlet hole.

[0034] The implementation principle of Example 1 of the utility model is as follows: the core body 4 is threadedly connected to the hole of the valve body 1 for installing the pressure indicator 2, and the sealing ring 7 is tightly attached to the inner wall of the valve body 1 to seal the gap between the core body 4 and the valve body 1. The pressure indicator 2 is installed on the valve body 1, and the end face of the detection end of the pressure indicator 2 abuts the sliding rod 5, and the sliding rod 5 is pushed to move into the fire extinguishing gas cylinder. At this time, the sealing sheet 9 gradually moves away from the core body 4, and the opening of the core body 4 is gradually opened. When the pressure indicator 2 is installed, the sliding rod 5 moves to the end of the stroke, and the opening of the core body 4 is fully opened. The gas in the fire extinguishing gas cylinder flows to the detection end of the pressure indicator 2 through the connecting groove 3, and the pressure indicator 2 performs real-time detection of the pressure in the fire extinguishing gas cylinder.

[0035] When the pressure indicator 2 is replaced, as the pressure indicator 2 is removed from the valve body 1, the spring 62 rebounds and pushes the sliding rod 5 to reset, and the sealing sheet 9 is reconnected to the core body 4 to seal the opening of the core body 4. The gas in the fire extinguishing gas cylinder cannot be discharged, effectively avoiding gas leakage in the fire extinguisher bottle when the pressure indicator 2 is replaced.

[0036] Embodiment 2:

[0037] During the installation process, the detection end of the pressure indicator 2 needs to push the sliding rod 5 to the end of the stroke so that the opening at the other end of the core body 4 can be fully opened, and the detection end of the pressure indicator 2 is provided with an air inlet hole for gas to enter to detect the air pressure. When the diameter of the sliding rod 5 is greater than or equal to the diameter of the air inlet hole, after the pressure indicator 2 is installed in the valve body 1, the end face of the sliding rod 5 will close the air inlet hole of the pressure indicator 2, resulting in the inability of the pressure indicator 2 to accurately detect the air pressure. On the contrary, when the diameter of the sliding rod 5 is smaller than the diameter of the air inlet hole of the pressure indicator 2, there is a situation where the pressure indicator 2 has difficulty in pushing the sliding rod 5 to move into the fire extinguisher bottle, or it is difficult to push the sliding rod 5 to the end of the stroke.

[0038] Reference Figure 5 and Figure 6 , the difference between Example 2 and Example 1 is that: the connecting groove 3 is no longer provided on the detection end of the pressure indicator 2, the diameter of the sliding rod 5 is smaller than the diameter of the air inlet of the pressure indicator 2, and a stopper 12 is fixed to the end of the sliding rod 5 away from the sealing sheet 9, and the stopper 12 is arranged outside the core 4. The length of the stopper 12 is greater than the radius of the air inlet of the detection end of the pressure indicator 2, so that when the pressure indicator 2 approaches the sliding rod 5, the sliding rod 5 cannot extend into the air inlet of the pressure indicator 2 under the blocking effect of the stopper 12, thereby ensuring that the gas can smoothly enter the pressure indicator 2. It can be understood that in this specific embodiment, two stoppers 12 are selected and arranged in a straight line for illustration, and in actual design, the number of stoppers 12 can be adjusted to 1, or 3 or more as needed.

[0039] The implementation principle of Example 2 of the utility model is as follows: the core body 4 is threadedly connected to the hole of the valve body 1 for installing the pressure indicator 2, and the sealing ring 7 is tightly attached to the inner wall of the valve body 1 to seal the gap between the core body 4 and the valve body 1. The pressure indicator 2 is installed on the valve body 1, and the end face of the detection end of the pressure indicator 2 abuts against the block 12, and pushes the block 12 to move toward the core body 4, thereby causing the sliding rod 5 to slide into the fire extinguishing gas cylinder. At this time, the sealing sheet 9 gradually moves away from the core body 4, and the opening of the core body 4 is gradually opened. When the pressure indicator 2 is installed, the sliding rod 5 moves to the end of the stroke, and the opening of the core body 4 is fully opened. The gas in the fire extinguishing gas cylinder flows into the detection end of the pressure indicator 2, and the pressure indicator 2 performs real-time detection of the pressure in the fire extinguishing gas cylinder.

[0040] When the pressure indicator 2 is replaced, as the pressure indicator 2 is removed from the valve body 1, the spring 62 rebounds and pushes the sliding rod 5 to reset, and the sealing sheet 9 is reconnected to the core body 4 to seal the opening of the core body 4. The gas in the fire extinguishing gas cylinder cannot be discharged, effectively avoiding gas leakage in the fire extinguisher bottle when the pressure indicator 2 is replaced.

[0041] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A fire extinguisher pressure indicator mounting structure, comprising a valve body (1), to which a pressure indicator (2) is connected, characterized in that: The valve body (1) is provided with a core body (4), the core body (4) is penetrated by a connecting hole (10), a sliding rod (5) is provided in the connecting hole (10), one end of the sliding rod (5) passes through one end of the core body (4), and the other end passes through the other end of the core body (4), a sealing sheet (9) is provided at one end of the sliding rod (5) outside the core body (4), and a reset component (6) connected to the sliding rod (5) is provided in the core body (4).

2. The fire extinguisher pressure indicator mounting structure according to claim 1, characterized in that: The reset assembly (6) comprises an elastic member and a limiting step (63), the sliding rod (5) passes through the elastic member, the limiting step (63) is arranged on the inner wall of the core body (4), and the sliding rod (5) is provided with a pressing block (61) on the side wall inside the core body (4).

3. The fire extinguisher pressure indicator mounting structure according to claim 1, characterized in that: A sealing ring (7) is provided on the outer wall of the core (4).

4. The fire extinguisher pressure indicator mounting structure according to claim 1, characterized in that: The diameter of the sliding rod (5) is smaller than the diameter of the air inlet hole at the detection end of the pressure indicator (2).

5. The fire extinguisher pressure indicator mounting structure according to claim 4, characterized in that: A stopper (12) is provided at one end of the sliding rod (5) away from the sealing sheet (9).

6. The fire extinguisher pressure indicator mounting structure according to claim 5, characterized in that: The length of the stopper (12) is greater than the radius of the air inlet hole at the detection end of the pressure indicator (2).

7. The fire extinguisher pressure indicator mounting structure according to claim 1, characterized in that: A limiting plate (13) is provided at one end of the sliding rod (5) close to the sealing plate (9); the limiting plate (13) is arranged on a side of the sealing plate (9) away from the core body (4); and a retaining ring (8) is provided on the circumferential surface of the limiting plate (13).

8. The fire extinguisher pressure indicator mounting structure according to claim 1, characterized in that: The detection end of the pressure indicator (2) is provided with a communication groove (3), and the communication groove (3) is connected to the air inlet hole of the detection end of the pressure indicator (2).

9. The fire extinguisher pressure indicator mounting structure according to claim 1, characterized in that: The sealing sheet (9) is provided with a slot (11) for the core body (4) to be inserted into.

10. The fire extinguisher pressure indicator mounting structure according to claim 1, characterized in that: The outer wall of the core body (4) is provided with threads.

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