Nitrogen discharge valve with flow monitoring function

Abstract

The utility model provides a nitrogen release valve with a flow monitoring function, which comprises a valve body, a mounting seat is arranged at the top of the valve body, the top of the mounting seat is connected with a membrane cover through a supporting rod body, a spring barrel is arranged at the center of the top end of the membrane cover, a spring outer frame is movably arranged in the spring barrel, a spring inner frame is movably arranged in the spring outer frame, and a flow monitoring device is arranged in the spring inner frame. A spring supporting cavity is formed in the spring inner frame, and a supporting spring is arranged in the spring supporting cavity. The spring barrel with an improved structure is arranged at the top of the membrane cover, the spring outer frame and the spring inner frame are arranged in the spring barrel, the spring inner frame slides in the spring outer frame, and the spring outer frame is pressed and limited in the spring barrel through the locking screw rod and the pressing sleeve, so that the membrane cover is not prone to falling off. The spring outer frame and the spring inner frame can be independently detached from the interior of the spring barrel, and then the supporting spring in the detached spring inner frame can be directly replaced from the outside.

Description

Technical Field

[0001] This utility model belongs to the field of valve body technology and relates to a nitrogen release valve with flow monitoring. Background Technology

[0002] The nitrogen release valve is a self-regulating valve that does not require any external energy. It controls the nitrogen pressure inside the container to remain stable within a set range, thus preventing direct contact between the material inside the container and the air, preventing the material from evaporating or being oxidized, and ensuring the safe operation of the container. The operating principle is as follows: When the liquid inlet valve of the storage tank is opened and material is added to the tank, the liquid level rises, the volume of the gas phase decreases, and the gas pressure increases. When the gas pressure inside the tank rises to a value higher than the predetermined pressure of the nitrogen release valve, the nitrogen release valve opens, releasing nitrogen to the outside, causing the pressure inside the tank to drop. When the pressure drops to the predetermined point of the nitrogen release valve pressure, the nitrogen release valve automatically closes.

[0003] The nitrogen release valve in the relevant technology has the following shortcomings:

[0004] The spring structure at the top of the valve body is fixedly installed on the top of the diaphragm cover. Under long-term compression, the spring elasticity decreases and needs to be replaced. However, the fixed spring structure is not easy to disassemble and replace. Summary of the Invention

[0005] The purpose of this invention is to provide a nitrogen release valve with flow monitoring to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solution: A nitrogen release valve with flow monitoring includes a valve body, a mounting base, a support rod, and a diaphragm cover. The valve body is provided with a mounting base at its top, and the top of the mounting base is connected to the diaphragm cover via the support rod. A spring cylinder is provided at the center of the top of the diaphragm cover. A spring outer frame is movably arranged inside the spring cylinder, and a spring inner frame is movably arranged inside the spring outer frame. A spring support cavity is opened inside the spring inner frame, and a support spring is arranged inside the spring support cavity.

[0007] In the aforementioned nitrogen release valve with flow monitoring, a diaphragm is provided inside the diaphragm cover, a spring seat is provided at the center of the diaphragm, and the bottom end of the supporting spring is sleeved on the outside of the spring seat.

[0008] In the aforementioned nitrogen release valve with flow monitoring, a valve stem is provided at the bottom end of the spring seat, and a valve core is connected to the top end of the valve stem through the support rod body, with the valve core located inside the valve body.

[0009] In the aforementioned nitrogen release valve with flow monitoring, one end of the valve body is provided with an air inlet, the other end of the valve body is provided with an air outlet, a flow meter is installed on the outer wall of the valve body near the air outlet, a vent is provided at the connection between the air outlet and the air inlet, and the valve core is pressed into the vent.

[0010] In the aforementioned nitrogen release valve with flow monitoring, support rods are provided on both sides of the spring frame, and a guide groove is provided on the outer wall of the spring cylinder. One end of the support rod passes through the guide groove and is threaded into the clamping sleeve on the outer side of the spring cylinder.

[0011] In the aforementioned nitrogen release valve with flow monitoring, a scale rod is provided at the top of the inner spring frame, the top of the scale rod passes through the outer spring frame and is positioned at the top of the outer spring frame, and a locking screw is provided at the top of the outer spring frame, with one end of the locking screw pressed against the outside of the scale rod.

[0012] Compared with the prior art, the advantages of the nitrogen release valve with flow monitoring of this utility model are as follows:

[0013] 1. This application provides a spring cylinder with an improved structure on the top of the membrane cover. The spring cylinder contains an outer spring frame and an inner spring frame. The inner spring frame slides inside the outer spring frame, and the outer spring frame is pressed and limited inside the spring cylinder by a locking screw and a clamping sleeve. In this way, the outer spring frame and the inner spring frame can be removed separately from inside the spring cylinder, and the support spring inside the removed inner spring frame can be replaced directly from the outside.

[0014] 2. This application provides an outer spring frame and an inner spring frame inside the spring cylinder, and the top of the outer spring frame supports the inner spring frame via a scale rod. Since the outer spring frame and the inner spring frame of this application can be disassembled separately, the position of the scale rod can be adjusted directly outside the spring cylinder, thereby adjusting the position of the inner spring frame inside the outer spring frame and adjusting the compression degree of the support spring. Compared with the traditional fixed adjustment, the adjustment is more efficient and convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a nitrogen release valve with flow monitoring according to this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of a nitrogen release valve with flow monitoring according to this utility model.

[0017] Figure 3 This is an enlarged schematic diagram of the spring inner frame structure of a nitrogen release valve with flow monitoring according to this utility model.

[0018] In the diagram, 1. Valve body; 2. Mounting seat; 3. Support rod; 4. Diaphragm cover; 5. Spring sleeve; 6. Spring seat; 7. Spring outer frame; 8. Support spring; 9. Valve stem; 10. Valve core; 11. Vent; 12. Spring inner frame; 13. Scale rod; 14. Locking screw; 15. Support side rod; 16. Pressure sleeve; 17. Spring support cavity. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] A nitrogen release valve with flow monitoring includes a valve body 1, a mounting base 2, a support rod 3, and a diaphragm cover 4. The mounting base 2 is provided on the top of the valve body 1, and the diaphragm cover 4 is connected to the top of the mounting base 2 through the support rod 3. A spring cylinder 5 is provided at the center of the top of the diaphragm cover 4. A spring outer frame 7 is movably provided inside the spring cylinder 5, and a spring inner frame 12 is movably provided inside the spring outer frame 7. A spring support cavity 17 is opened inside the spring inner frame 12, and a support spring 8 is provided inside the spring support cavity 17.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a nitrogen release valve with flow monitoring. Specifically, a diaphragm 18 is provided inside the diaphragm cover 4, and a spring seat 6 is provided at the center of the diaphragm 18. The bottom end of the supporting spring 8 is sleeved on the outside of the spring seat 6.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a nitrogen release valve with flow monitoring. Specifically, a valve stem 9 is provided at the bottom end of the spring seat 6, and a valve core 10 is connected to the top end of the valve stem 9 through the support rod body 3. The valve core 10 is located inside the valve body 1.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a nitrogen release valve with flow monitoring. Specifically, one end of the valve body 1 is provided with an air inlet, and the other end of the valve body 1 is provided with an air outlet. A flow meter is installed on the outer wall of the valve body 1 near the air outlet. A vent 11 is provided at the connection between the air outlet and the air inlet. The valve core 10 is pressed into the vent 11. The flow meter of this application mainly detects the gas flow rate at the air outlet. The flow meter is a commercially available device known to those skilled in the art. Here, we are only using it and have not made any structural or functional improvements. We will not go into details here.

[0024] like Figure 1, Figure 2 and Figure 3 As shown, this utility model discloses a nitrogen release valve with flow monitoring. Specifically, support rods 15 are provided on both sides of the spring outer frame 7, and a guide groove is provided on the outer wall of the spring cylinder 5. One end of the support rod 15 passes through the guide groove and is threadedly connected to the clamping sleeve 16 on the outer side of the spring cylinder 5. The support rod 15 has a metal screw structure, and the outer wall of the spring cylinder 5 has a side groove. When the clamping sleeve 16 is rotated, one end of the clamping sleeve 16 can be pressed into the side groove, thereby having an anti-limiting function, thus limiting the spring outer frame 7 inside the spring cylinder 5.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a nitrogen release valve with flow monitoring. Specifically, a scale rod 13 is provided at the top of the inner spring frame 12. The top of the scale rod 13 passes through the outer spring frame 7 and is positioned at the top of the outer spring frame 7. A locking screw 14 is provided at the top of the outer spring frame 7, and one end of the locking screw 14 is pressed against the outside of the scale rod 13. After adjusting the position of the scale rod 13, the locking screw 14 can be rotated to press the scale rod 13. The scale rod 13 of this application has an indicator scale on its surface, which can provide a reference when adjusting the preset pressure of the support spring 8.

[0026] This utility model discloses a nitrogen release valve with flow monitoring. When using the nitrogen release valve, its valve body 1 is installed at both ends via flanges. To set a predetermined pressure value, the operator rotates to disassemble the outer spring frame 7 and the inner spring frame 12 from inside the spring cylinder 5. The length of the adjustable scale rod 13 is then adjusted, causing the inner spring frame 12 at the bottom of the scale rod 13 to press downwards against the support spring 8. The outer spring frame 7 and the inner spring frame 12 are then installed, so that the bottom end of the support spring 8 is fitted onto the spring seat 6. The clamping sleeve 16 is rotated, pressing against the outer wall of the spring cylinder 5, thereby limiting the installation of the outer spring frame 7 inside the spring cylinder 5. 2. After adjustment and installation, when the inner spring frame 12 descends, the squeezing force on the support spring 8 increases, the pressure preset value increases, the force required to lift the diaphragm 18 is greater, and the valve core 10 is more difficult to open. Conversely, the squeezing force on the support spring 8 decreases, the pressure preset value decreases, the force required to lift the diaphragm 18 is less, and the valve core 10 is easier to open. After determining the pressure preset value, the nitrogen release valve does not work under normal conditions. When the pressure inside the valve is too high and sufficient to open the valve core 10, the diaphragm 18 is lifted by the air pressure, the valve stem 9 rises, the valve core 10 opens, and the nitrogen release valve begins to release pressure. When the pressure inside the nitrogen release valve decreases to the pressure preset value, the diaphragm 18 returns to its original position, the valve stem 9 descends, the valve core 10 closes, and the nitrogen release valve stops working.

[0027] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A nitrogen release valve with flow monitoring, comprising a valve body (1), a mounting base (2), a support rod (3), and a diaphragm cover (4), characterized in that, The valve body (1) is provided with a mounting base (2) at the top. The top of the mounting base (2) is connected to a diaphragm cover (4) via a support rod (3). A spring cylinder (5) is provided at the center of the top of the diaphragm cover (4). A spring outer frame (7) is movably provided inside the spring cylinder (5). A spring inner frame (12) is movably provided inside the spring outer frame (7). A spring support cavity (17) is provided inside the spring inner frame (12). A support spring (8) is provided inside the spring support cavity (17).

2. A nitrogen release valve with flow monitoring according to claim 1, characterized in that, The membrane cover (4) is provided with a membrane sheet (18) inside, and a spring seat (6) is provided at the center of the membrane sheet (18). The bottom end of the support spring (8) is sleeved on the outside of the spring seat (6).

3. A nitrogen release valve with flow monitoring according to claim 2, characterized in that, The bottom end of the spring seat (6) is provided with a valve stem (9), the top end of the valve stem (9) passes through the support rod body (3) and is connected to a valve core (10), and the valve core (10) is located inside the valve body (1).

4. A nitrogen release valve with flow monitoring according to claim 3, characterized in that, One end of the valve body (1) is provided with an air inlet, and the other end of the valve body (1) is provided with an air outlet. A flow meter is installed on the outer wall of the valve body (1) near the air outlet. A vent (11) is provided at the connection between the air outlet and the air inlet. The valve core (10) is pressed into the vent (11).

5. A nitrogen release valve with flow monitoring according to claim 1, characterized in that, Both sides of the spring outer frame (7) are provided with support side rods (15), and the outer wall surface of the spring cylinder (5) is provided with a guide groove. One end of the support side rod (15) passes through the guide groove and is threadedly connected to the clamping sleeve (16) on the outside of the spring cylinder (5).

6. A nitrogen release valve with flow monitoring according to claim 1, characterized in that, The top of the inner spring frame (12) is provided with a scale rod (13), the top of the scale rod (13) passes through the outer spring frame (7) and is placed on the top of the outer spring frame (7). A locking screw (14) is provided at the top of the outer spring frame (7), and one end of the locking screw (14) is pressed against the outside of the scale rod (13).

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