CN110360378A - High pressure gas cylinder bottle-jack valve with heat-storing device and gas cylinder inflation/deflation temprature control method - Google Patents

Abstract

The invention discloses a bottle mouth valve of a high-pressure gas cylinder with a heat storage device and a method for controlling the filling and discharging temperature of the gas cylinder. The valve body of the bottle mouth valve is provided with a vertical air discharge port and a horizontal air charge port for gas circulation. The valve body also includes a control port and a control channel. Through the control channel, the top of the valve stem is connected with the operating handle, the valve stem and the valve body at the control port are sealed with sealing packing, and the packing gland is used to compress the sealing packing; the middle part of the valve stem is threaded with the valve body; The end of the valve stem is connected to the valve core at the air discharge port; the heat storage device is assembled at the inlet of the air charging port, and the heat storage device is filled with two phase change media to realize heat storage and heat release functions respectively. The invention introduces the phase change heat storage device into the bottle mouth valve of the gas cylinder, which can effectively prevent the gas temperature from being too high or too low when the gas cylinder is filled and deflated, and can effectively reduce the gas cylinder filling while ensuring the safety of the gas cylinder. time consumption.

Description

Bottle mouth valve of high-pressure gas cylinder with heat storage device and method for controlling the temperature of gas cylinder filling and deflation

technical field

The invention relates to the technical field of gas cylinder valves, in particular to a high-pressure gas cylinder mouth valve with a heat storage device and a method for controlling the filling and deflation temperature of the gas cylinder.

Background technique

In the process of using a high-pressure inflation device to pressurize and inflate a high-pressure gas cylinder, a large amount of heat will be generated, which includes both the heat generated when the supercharger inflation device is working, and the heat generated by the compressed gas passing through the pipeline throttling. These heats cause the temperature of the filling medium to rise, which is not conducive to the safe use of high-pressure gas cylinders, and requires a certain cooling time before they can be put into use. At the same time, due to the increase in gas temperature, more energy is required to compress and fill gas cylinders , so it is necessary to control the temperature rise when the high-pressure gas cylinder is inflated; at the same time, when the gas cylinder is quickly deflated under working conditions, it will also cause a decrease in the gas temperature, and too low temperature is not conducive to the direct use of the working medium of the gas cylinder.

Taking the filling of high-pressure gas cylinders as an example, the conversion temperature of hydrogen is much lower than the ambient temperature. At room temperature, the isenthalpy expansion coke soup coefficient of hydrogen is negative, and the temperature rises significantly after throttling, so the process of filling and deflation will cause obvious temperature Changes, when inflated quickly, the temperature can reach above 100°C, and when deflated quickly, the temperature can drop below 0°C. Excessively high temperature is not conducive to the safe use of high-pressure hydrogen cylinders. At the same time, the increase in the filling temperature will reduce the gas density, and the temperature drop will increase the gas density, which will also reduce the actual hydrogen filling capacity of the gas cylinder and reduce the work of the gas cylinder. efficiency.

Aiming at the phenomenon of temperature rise during gas cylinder filling, in the Chinese patent application document with publication number CN 109307151A, a high-pressure gas cylinder filling gas cooling device is disclosed, which adopts a heat exchange device composed of a shell and a finned spiral tube. It can cool down the high-temperature gas after being pressurized and inflated, so that the filled gas cylinder can be put into use immediately; in the Chinese patent application document with the publication number CN 106895253A, a superconducting cooling device is disclosed. The fiber-reinforced composite material high-pressure gas cylinder, through the superconducting heat pipe extending into the high-pressure gas cylinder, the heat in the gas medium is exported to the outside of the gas cylinder. Generally speaking, both of the above two solutions require relatively complicated structural devices or structural modifications to the gas cylinders. At the same time, the heat treatment is simply discharged, which is not energy-saving and efficient. Therefore, it is necessary to propose a more simple, practical, energy-saving and efficient solution to solve the above problems.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a bottle mouth valve for a high-pressure gas cylinder with a heat storage device. The bottle mouth valve can effectively prevent the filling and deflation of the gas cylinder while realizing the normal filling and deflation function of the gas cylinder. When the gas temperature is too high or too low, while ensuring the safety of the gas cylinder, it can effectively reduce the energy consumption when the gas cylinder is inflated.

The technical scheme that the present invention specifically adopts is:

A bottle-mouth valve for a high-pressure gas cylinder with a heat storage device, which includes a valve body, a valve core, an air release port, a valve stem, a control channel, a sealing packing, a packing gland, a driving handle, an air charging port, and a heat storage device;

The vertical direction of the valve body is provided with an air release port, a control channel and a control port sequentially from top to bottom, and the valve body is horizontally provided with an air charging port, and the air release port and the air charging port are connected through the control channel to form a gas passage; The control port goes through the control channel and extends into the air release port. The top of the valve stem is connected with the operating handle. The valve stem at the control port and the valve body are sealed with sealing packing; It is used to compress the sealing packing; the middle part of the valve stem cooperates with the valve body through the valve stem thread to form a screw pair that controls the up and down movement of the valve stem; the valve core is fixed at the bottom of the valve stem; the heat storage device is assembled at the inlet of the gas charging port The heat storage device is divided into inner and outer layers, and an air intake channel is formed between the two layers. The inner and outer layers are respectively filled with different phase change heat storage media. The melting point of the outer heat storage medium is higher than room temperature. It is solid at the bottom; the freezing point of the heat storage medium in the inner layer is lower than room temperature, and it is liquid at room temperature; the valve core can move vertically up and down when the driving handle drives the valve stem to rotate, and the communication port between the control channel and the air release port is adjusted. Open and close control.

Preferably, the air-inflating port and the air-releasing port are distributed at a right angle of 90°, and the air-releasing port and the center of rotation of the control channel are on the same straight line.

Preferably, the upper end of the control channel in the valve body is provided with an internal thread, which forms a threaded fit with the valve stem thread in the middle of the valve stem, and the diameter of the valve stem at the valve stem thread in the middle of the valve stem is slightly larger than the diameter at other positions of the valve stem .

Preferably, a circular hole is opened in the center of the packing gland, the diameter of the circular hole is slightly larger than the diameter of the valve stem, and the valve stem is fixed to the driving handle after passing through the circular hole in the center of the packing gland.

Preferably, the packing gland and the upper end of the valve body are fixedly installed by fastening nuts and bolts.

Preferably, the diameter of the passage between the control passage and the air release port is slightly larger than the diameter of the valve stem.

Preferably, the valve core is hemispherical, the bottom of the communication port between the control channel and the air release port is conical, and when the valve is closed, the spherical surface at the top of the valve core is in close contact with the conical inclined surface of the communication port.

Preferably, in the heat storage device, the inner layer is a cylinder, and the outer layer is a hollow cylinder coaxially nested outside the inner layer, with an annular air intake channel left between them.

Preferably, the valve body at the inflation port and the gas discharge port are respectively provided with a gas inflation port thread and a gas discharge port thread on the outside of the valve body, which are respectively used for connection with pipelines and gas cylinders.

Another object of the present invention is to provide a method for controlling the filling and deflation temperature of a gas cylinder using the bottle mouth valve described in any of the above schemes, which specifically includes: installing the bottle mouth valve of the high-pressure gas cylinder on the gas cylinder to be controlled. On the mouth of the bottle; when the gas cylinder is inflated, the temperature of the gas filling port of the valve rises, and when the temperature is higher than the melting point of the outer heat storage medium, the outer heat storage medium melts and absorbs heat, and cools down the gas at the inlet of the valve; when the gas cylinder is deflated , the temperature of the gas filling port of the valve decreases, and when the temperature is lower than the freezing point temperature of the inner heat storage medium, the inner heat storage medium solidifies and releases heat, which increases the gas temperature and prevents the outlet gas temperature from being too low.

The beneficial effects of the present invention are:

The invention introduces the phase-change heat storage device into the bottle mouth valve of the gas cylinder. While realizing the normal filling and deflation function of the gas cylinder, it can effectively prevent the gas temperature from being too high or too low during filling and deflation of the gas cylinder. While the bottle is safe to use, it can effectively reduce the energy consumption when the gas bottle is inflated; the invention has a simple and compact structure, adopts a reverse sealing design, and can effectively reduce gas leakage.

Description of drawings

Fig. 1 is the semi-sectional view of the bottleneck valve involved in the present invention;

In the figure: 1. Air release port; 2. Valve core; 3. Control channel; 4. Valve stem; 5. Seal packing; 6. Packing gland; 7. Nut; 8. Handle; 9. Fastening bolt; 10. Valve body; 11, valve stem thread; 12, air charging port thread; 13, air charging port; 14, heat storage device; 15, air discharge port thread.

Fig. 2 is a half-sectional view of the heat storage device involved in the present invention;

In the figure: 16, outer layer heat storage medium; 17, support; 18, inner layer heat storage medium.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, in this embodiment, a high-pressure gas cylinder bottle mouth valve with a heat storage device includes a valve body 10, a valve core 2, an air release port 1, a valve stem 4, a control channel 3, and a sealing packing 5 , packing gland 6, driving handle 8, air charging port 13 and heat storage device 14;

Wherein, the valve body 10 adopts an integral design. The valve body 10 is provided with an air release port 1, a control channel 3 and a control port in sequence from top to bottom in the vertical direction, and the control port is opened on the top of the valve body 10 for installing the valve stem and corresponding sealing components; There is an inflation port 13, the inflation port 13 and the air discharge port 1 are distributed at a 90° right angle, and the center line of the air discharge port 1 and the center of rotation of the control channel 3 are on the same straight line, and the air discharge port 1 and the inflation port 13 are connected through the control channel 3 Form the gas passage.

The valve stem 4 passes through the control passage 3 through the control port and then extends into the air release port 1 , and the top of the valve stem 4 is connected with a disc-shaped operating handle 8 . The valve stem 4 at the control port and the valve body 10 are sealed with sealing packing 5 to prevent gas from escaping from the control port. The packing gland 6 is used to compress the sealing packing 5, which is assembled at the control port of the valve body , the bottom is pressed on the top surface of the sealing packing 5; there is a round hole in the center of the packing gland 6, and the diameter of the round hole is slightly larger than the diameter of the valve stem 4, and the valve stem 4 passes through the round hole in the center of the packing gland 6 from the control port and connects with the operating handle 8 is fixed at the bottom, and the packing gland 6 and the upper end of the valve body 10 are detachably fixed and installed through fastening nuts 7 and bolts 9 .

The middle part of the valve stem 4 taps the valve stem thread 11 outward circumferentially, and the upper end of the control passage 3 in the valve body 10 is provided with an internal thread, which cooperates with the valve stem thread 11 in the middle of the valve stem 4 to form a spiral for controlling the up and down movement of the valve stem 4. vice. The diameter of the valve stem at the valve stem thread 11 in the middle of the valve stem 4 is slightly larger than the diameters at other positions of the valve stem 4; The end of the valve stem 4 located in the air release port 1 is fixed with a valve core 2, the valve core 2 is hemispherical, and the bottom of the communication port between the control channel 3 and the air release port 1 is conical; Driven by the rod 4, it can move up and down in the vertical direction to control the opening and closing of the communication port between the control channel 3 and the air release port 1. When the valve is closed, the spherical surface at the top of the valve core 2 needs to be in contact with the conical inclined surface of the connecting port, so that the connecting port is closed and the gas cannot be discharged from the vent; when the valve is opened, the spherical surface at the top of the valve core 2 needs to be made Disengages from the conical slope of the communication port, thereby opening the communication port.

The valve body 10 at the valve inflation port 13 and the gas discharge port 1 are provided with an inflation port thread 12 and a gas discharge port thread 15 for connection with pipelines and gas cylinders.

The heat storage device 14 is assembled at the entrance of the gas charging port 13, and the heat storage device 14 is divided into two layers, an inner layer and an inner layer. In this embodiment, in the heat storage device 14, the inner layer is a cylinder, and the outer layer is coaxially nested outside the inner layer. The hollow cylinder is sandwiched between the two to form a ring-shaped air intake channel. After the gas entering the inlet of the inflation port 13 passes through the air intake channel, it is discharged from the air discharge port 1 through the control channel 3 . In order to control the temperature of the intake and outlet air, the inner and outer layers are filled with different phase-change heat storage media, in which the melting point of the outer heat storage medium 16 is higher than room temperature and is solid at room temperature; the inner heat storage medium 18 has a freezing point Below room temperature, it is liquid at room temperature. The cavity of the inner layer heat storage medium 18 is supported in the center of the cavity of the outer layer heat storage medium 16 through the bracket 17 fixed on the inner wall of the cavity of the outer layer heat storage medium 16 . The specific materials of the two media are not limited, and any material that can achieve the corresponding function can be used. For example, the outer heat storage medium 16 can use Glauber's salt, paraffin wax P-116, sodium sulfate hydrate, calcium chloride hexahydrate, sodium dihydrogen phosphate Salt dodecahydrate, etc., and the inner heat storage medium 18 can use paraffin wax RT5, oleic acid, linoleic acid, linolenic acid, etc.

The gas cylinder charging and discharging temperature control method based on the above-mentioned high-pressure gas cylinder bottleneck valve is as follows: the high-pressure gas cylinder bottleneck valve is installed on the gas cylinder bottleneck to be controlled;

When the inflator is connected to the inflatable port 13 to inflate the cylinder, the temperature of the valve inflatable port 13 rises, and when the temperature is higher than the melting point temperature of the outer heat storage medium 16 of the heat storage device 14, the outer heat storage medium 16 melts and absorbs heat. Cool down the gas inlet to the valve;

When the bottle mouth valve is opened and the gas cylinder is deflated, the compressed gas will expand, absorb heat and cool down after passing through the bottle mouth valve, and the temperature of the valve charging port 13 will decrease. When the temperature of the freezing point is reached, the heat storage medium 18 in the inner layer solidifies and releases heat, which increases the gas temperature and prevents the outlet gas temperature from being too low.

In addition, the axial length of the heat storage device can be adjusted according to the gas volume of the gas cylinder to achieve a better temperature control effect.

Therefore, the present invention introduces the phase change heat storage device into the bottle mouth valve of the gas cylinder, which can effectively prevent the gas temperature from being too high or too low when the gas cylinder is filled or deflated while realizing the normal filling and deflation function of the gas cylinder. While ensuring the safety of the gas cylinder, it can effectively reduce the energy consumption when the gas cylinder is inflated.

The above-mentioned embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Various changes and modifications can be made by those skilled in the relevant technical fields without departing from the spirit and scope of the present invention. Therefore, all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device, it is characterised in that: including valve body (10), spool (2), gas vent (1), valve rod (4), control channel (3), airtight and watertight padding (5), gland (6), driving handle (8), inflating port (13) and heat accumulation Device (14)；

Described valve body (10) vertical direction is successively arranged gas vent (1), control channel (3) and control mouth, valve body from top to bottom Level is equipped with inflating port (13), and gas vent (1) and inflating port (13) connect and compose gas passage through control channel (3)；The valve Bar (4) protrudes into gas vent (1) after control mouth passes through control channel (3), connect at the top of valve rod (4) with operation handle (8), controls It is sealed between valve rod (4) at donsole and valve body (10) using airtight and watertight padding (5)；Gland (6) is assemblied in valve body control At donsole, for compressing airtight and watertight padding (5)；Cooperated with valve body (10) by threaded stem (1) around in the middle part of valve rod (4), Constitute the screw pair that control valve rod (4) moves up and down；Valve rod (4) bottom end is fixed with spool (2)；Heat-storing device (14) dress Assigned in inflating port (13) inlet, heat-storing device (14) is divided into clamping between two layers, two layers inside and outside and forms an inlet channel, interior Different phase-change thermal storage media is filled respectively outer two layers, wherein outer layer heat-storage medium (16) fusing point is higher than room temperature, is at room temperature Solid-state；Internal layer heat-storage medium (18) freezing point is lower than room temperature, is in a liquid state at room temperature；The spool (2) is in driving handle (8) band When ovable valve stem (4) rotates, it can vertically move up and down, control is opened and closed to the communication port between control channel (3) and gas vent (1) System.

2. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the inflating port (13) it is distributed with gas vent (1) in 90 ° of right angles, the gas vent (1) and control channel (3) centre of gyration are in same straight line On.

3. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the valve body (10) control channel (3) upper end in is equipped with threaded stem (11) formation in the middle part of internal screw thread, with valve rod (4) and is threadedly engaged, institute State the diameter that the stem diameter in the middle part of valve rod (4) at threaded stem (11) is slightly larger than valve rod (4) other positions.

4. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the filler pressure Lid (6) center is provided with circular hole, and Circularhole diameter is slightly larger than valve rod (4) diameter, and valve rod (4) passes through the circular hole at gland (6) center It is fixed with driving handle (8) afterwards.

5. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the filler pressure (6) and valve body (10) upper end is covered to be fixedly mounted by fastening nut (7) and bolt (9).

6. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the control is logical Channel diameter between road (3) and gas vent (1) is slightly larger than valve rod (4) diameter.

7. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the spool (2) hemispherical, the communication port bottom between control channel (3) and gas vent (1) is tapered, when valve is closed, at the top of spool (2) Spherical surface contacted with the tapered slope of communication port it is closely sealed.

8. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the heat accumulation dress It sets in (14), internal layer is cylindrical body, and outer layer is the hollow cylinder being coaxially nested in outside internal layer, and there are annulars between the two Inlet channel.

9. a kind of high pressure gas cylinder bottle-jack valve with heat-storing device according to claim 1, it is characterised in that: the inflation It is respectively equipped with inflating port screw thread (12), gas vent screw thread (15) outside valve body (10) at mouth (13), gas vent (1), is used respectively In the connection with pipeline, gas cylinder.

10. a kind of gas cylinder inflation/deflation temprature control method using the bottle-jack valve as described in claim 1~9 is any, feature It is: the high pressure gas cylinder bottle-jack valve is installed on bottle mouth of gas cylinder to be controlled；When inflating gas cylinder, valve inflating port (13) temperature Degree increase, temperature be higher than outer layer heat-storage medium (16) melting temperature when, outer layer heat-storage medium (16) melt heat absorption, to valve into Gas cools down；When gas cylinder is deflated, valve inflating port (13) temperature is reduced, and temperature is solidifying lower than internal layer heat-storage medium (18) When the temperature of solid point, internal layer heat-storage medium (18) solidifies heat release, improves gas temperature, prevents Outlet Gas Temperature too low.