Integrated valve with pressure relief and negative pressure prevention functions

Abstract

The utility model relates to the technical field of application of normal pressure liquid fuel steel cylinder container valves, in particular to a gas-phase integrated valve which has a self-closing function when a steel cylinder normally enters and exits liquid and has pressure relief, negative pressure prevention and fire retardance functions. According to the utility model, the pressure relief and negative pressure prevention structure is arranged, so that the aims of discharging gas in the tank body in time during feeding and relieving pressure in time when encountering external high temperature are fulfilled, and meanwhile, the problem that negative pressure is generated in the tank body during liquid discharging is solved; the technical problem that in the prior art, a valve cannot achieve pressure relief and negative pressure prevention at the same time is solved, and the purpose that the valve can achieve pressure relief and normal liquid outlet at the same time is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of application of valves for normal pressure liquid fuel cylinder containers, in particular to an integrated valve capable of self-relieving pressure and preventing negative pressure. Background Art

[0002] The calorific value of alcohol-based liquid fuel is lower than that of liquefied gas and diesel, but the price is more advantageous. It can be used as a substitute fuel for petroleum liquefied gas and fuel diesel. It is low-priced, safe, convenient, has no residue and liquid, does not blacken the bottom of the pot, has the characteristics of cleanliness, safety, cheapness, easy purchase of raw materials, and convenience of use. It is a biomass clean energy encouraged by the state to develop. The cost is only about one-third of the wholesale price of petroleum liquefied gas or diesel, with huge profit margins and extremely high investment value. This type of fuel oil is an updated product of alcohol-based liquid fuel. It solves the problems of low calorific value, low fire, low thermal efficiency, large consumption, environmental protection and uneconomical of alcohol-based liquid fuel. It not only fully meets the national standards for alcohol-based liquid fuels, but also has great improvements and improvements in calorific value, viscosity, flame temperature and other aspects. Most of the catering industries in restaurants, hotels, canteens of colleges and universities in large and medium-sized cities in my country use diesel and liquefied gas as energy sources for Chinese food stoves, and some still burn coal. Bio-alcohol oil is a newly developed environmentally friendly biofuel based on alcohol-based fuel. It can be stored, transported and used at room temperature and pressure. It does not require high-pressure cylinders and can be stored in ordinary metal or plastic containers.

[0003] Against the backdrop of the increasing depletion of fossil fuel resources, alcohol-based fuels, as new types of clean energy and carriers of carbon cycles, not only solve the problem of efficient storage and distribution of energy, but their diverse synthesis pathways and the re-synthesis and recycling of wastes such as carbon dioxide are of great significance to alleviating global warming.

[0004] Half of the alcohol-based fuel is stored in an alcohol-based liquid fuel tank, and the internal pressure of the alcohol-based liquid fuel tank can be controlled by a valve. However, the valve in the existing technology cannot simultaneously achieve self-pressure relief and prevent negative pressure. Therefore, the utility model proposes an integrated valve with self-pressure relief and prevention of negative pressure. Utility Model Content

[0005] The utility model provides an integrated valve with self-pressure relief and negative pressure prevention, which is used to solve the technical problem that valves in the prior art cannot simultaneously realize self-pressure relief, and achieves the purpose that the valve can simultaneously realize self-pressure relief.

[0006] The utility model provides an integrated valve with self-pressure relief and negative pressure prevention, comprising a valve body:

[0007] A valve body, with a valve core hole formed therein, a first boss and a second boss formed on the side wall of the valve body, a valve stem sealing structure formed on one end of the valve core hole, an L-shaped through hole formed on the first boss and the side wall of the valve body away from the valve stem sealing structure, and at least one L-shaped through hole is formed, a side through hole formed on the second boss, the L-shaped through hole is not connected to the valve core hole, the side through hole is connected to the valve core hole, and a positioning hole is formed on the side through hole;

[0008] A pressure relief structure, a one-way air intake structure or a liquid inlet and outlet water structure is installed at one end of the L-shaped through hole close to the first boss;

[0009] The liquid inlet structure is embedded in the side through hole, and the liquid inlet structure is fixed in the side through hole through the positioning hole.

[0010] According to the integrated valve with self-pressure relief and negative pressure prevention provided by the utility model: the valve stem sealing structure includes a valve assembly, a connecting piece, a valve stem, a pressure cap, a sealing gasket, a first O-ring, a hand wheel and a hexagonal nut, and the valve assembly, the connecting piece and the valve stem are embedded in one end of the valve core;

[0011] The valve assembly is arranged opposite to the valve stem, a groove is provided in the middle of the opposite surfaces of the valve assembly and the valve stem, and the connecting piece is fixedly arranged in the groove;

[0012] A sealing gasket is provided at one end of the valve stem away from the valve assembly;

[0013] The pressure cap is sleeved on the outside of one end of the valve body where the valve stem is provided, the first O-ring is provided inside the pressure cap, the handwheel is provided on the end of the pressure cap away from the valve body, a through hole is opened in the middle of the handwheel, and the hexagonal nut is provided in the through hole.

[0014] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the pressure cap is an inverted T-shaped cylinder, an inverted T-shaped through hole is opened in the middle of the inverted T-shaped cylinder of the pressure cap, the first O-ring is arranged at the part with smaller diameter of the inverted T-shaped through hole, and the part with larger diameter of the inverted T-shaped through hole is sleeved on the outer wall of the valve body.

[0015] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the L-shaped through hole includes a first through hole, a second through hole and a third through hole, the diameter of the first through hole is larger than that of the second through hole, the first through hole is horizontally concentrically connected to the second through hole, the second through hole and the third through hole have the same diameter, and the second through hole and the third through hole are vertically connected.

[0016] According to the utility model, an integrated valve with self-contained pressure relief and negative pressure prevention is provided: the pressure relief structure includes a safety valve assembly, a spring component and a pressure regulating plug; the safety valve assembly is a T-shaped cylinder, the thick end of the T-shaped cylinder is provided with a gasket, the thin end of the T-shaped cylinder is provided with a pressure relief spring, a first vent hole is opened at the bottom of the screw in the pressure regulating plug, the first vent hole matches the larger diameter of the side T-shaped cylinder, the inner diameter of the spring component matches the smaller diameter of the side T-shaped cylinder, the spring component is arranged between the pressure regulating plug and the safety valve assembly, one end of the spring component is fixedly connected to the inner bottom wall of the first vent hole of the pressure regulating plug, and the other end of the spring component is fixedly connected to the side wall of the side T-shaped cylinder at the smaller diameter.

[0017] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the outer diameter of the screw in the pressure regulating plug matches the diameter of the first through hole, the outer diameter of the head in the pressure regulating plug matches the outer diameter of the first boss, a second vent hole is opened in the middle of the screw head, and the second vent hole is connected to the first vent hole.

[0018] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the side through hole includes a fourth through hole, a fifth through hole and a sixth through hole, the diameter of the fourth through hole is smaller than that of the fifth through hole, the diameter of the fifth through hole is smaller than that of the sixth through hole, one end of the fourth through hole is connected to the valve core hole, the other end of the fourth through hole is horizontally concentrically connected to the fifth through hole, and the end of the fifth through hole away from the fourth through hole is horizontally concentrically connected to the sixth through hole.

[0019] According to the integrated valve with self-pressure relief and negative pressure prevention provided by the utility model: the liquid inlet structure includes a positioning pin, a connecting sleeve, a second O-ring, a third O-ring, a sealing piston, a fourth O-ring and a negative pressure spring;

[0020] One end of the negative pressure spring is arranged at the end of the fourth through hole away from the valve core hole, the other end of the negative pressure spring is fixedly connected to the sealing piston, the end of the sealing piston away from the negative pressure spring is connected to the connecting sleeve, a self-closing valve is installed inside the connecting sleeve, a groove is provided at the end of the connecting sleeve close to the sealing piston, one end of the sealing piston is embedded in the groove of the connecting sleeve, a third O-ring is embedded between the side wall of the groove and the outer wall of the sealing piston close to one end of the connecting sleeve, a first annular groove is provided on the outer wall of the connecting sleeve, the width of the first annular groove matches the diameter of the second O-ring, the second O-ring is embedded in the first annular groove, a cylindrical through hole is provided in the center of the connecting sleeve, the inner diameter of the cylindrical through hole matches the outer diameter of the fourth O-ring, the fourth O-ring is fixedly connected to the inner wall of the cylindrical through hole, a cylindrical boss with a smaller diameter is provided at the end of the sealing piston close to the connecting sleeve, the inner diameter of the fourth O-ring matches the outer diameter of the cylindrical boss;

[0021] A third annular groove is provided on the outer side wall of one end of the connecting sleeve away from the first annular groove, the width of the third annular groove is greater than the diameter of the positioning pin, the positioning pin penetrates the positioning hole and contacts the side wall of the third annular groove, a cylindrical through hole is provided in the center of the connecting sleeve, and a circulation hole is provided in the middle position of the sealing piston.

[0022] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the one-way air intake structure includes a gland, a fire-blocking mesh and a negative pressure core, the fire-blocking mesh is installed on the inner side of the gland, and the negative pressure core is installed on the inner side of the fire-blocking mesh.

[0023] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the liquid inlet and outlet structure includes an adjusting screw cover, a spring and an adjusting combination core, the adjusting combination core is arranged at one end close to the L-shaped through hole, the adjusting screw cover is arranged at one end away from the L-shaped through hole, and the spring is installed inside the adjusting screw cover.

[0024] The beneficial effects of the utility model are:

[0025] The utility model provides an integrated valve with self-contained pressure relief and negative pressure prevention. By arranging the pressure relief and negative pressure prevention structures, when liquid fuel enters the interior of the tank body, the pressure in the tank body will gradually increase, and the gas in the tank body will squeeze the safety valve assembly to compress the spring part to the left, and the gas is discharged from the tank body through the gap between the safety valve assembly and the pressure regulating screw plug. When the external temperature is too high and the internal pressure of the tank body is too large, the pressure relief structure can realize pressure relief based on the same principle, so as to realize the purpose of timely discharging the gas in the tank body when the tank body is fed and timely relieving the pressure when the external high temperature is encountered. At the same time, when discharging liquid, if negative pressure occurs in the tank, the pressure relief structure will open based on the pressure difference, and introduce external air into the tank body to balance the pressure and prevent negative pressure, so as to solve the problem of negative pressure generated in the tank body when discharging liquid, so that the valve can realize the purpose of self-contained pressure relief and normal liquid discharge at the same time.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to 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 creative work.

[0028] Figure 1 It is a three-dimensional structural diagram of an integrated valve with built-in pressure relief and negative pressure prevention;

[0029] Figure 2 is a cross-sectional view of Example 1;

[0030] Figure 3 is a cross-sectional view of the valve stem sealing structure of Example 1;

[0031] Figure 4 is a cross-sectional view of the pressure relief structure of Example 1;

[0032] Figure 5 is a cross-sectional view of the liquid inlet structure of Example 1;

[0033] Figure 6 is a cross-sectional view of Example 2;

[0034] Figure 7 is a schematic diagram of the bottom structure of Example 2;

[0035] Figure 8 is a cross-sectional view of Example 3;

[0036] Fig. 9is a schematic diagram of the bottom structure of Example 3;

[0037] Reference numerals:

[0038] 1. Valve body; 101. Valve core hole; 102. First boss; 103. Second boss; 104. L-shaped through hole; 105. Side through hole;

[0039] 2. Valve stem sealing structure; 201. Valve assembly; 202. Connecting piece; 203. Valve stem; 204. Pressure cap; 205. Sealing gasket; 206. First O-ring; 207. Hand wheel; 208. Hexagonal nut;

[0040] 3. Pressure relief structure; 301. Safety valve assembly; 302. Spring member; 303. Pressure regulating screw plug; 304. Gasket; 305. Pressure relief spring;

[0041] 4. Liquid inlet structure; 401. Positioning pin; 402. Connecting sleeve; 403. Second O-ring; 404. Third O-ring; 405. Sealing piston; 406. Fourth O-ring; 407. Negative pressure spring; 408. Flow hole; 409. Self-closing valve;

[0042] 5. One-way air intake structure; 501. gland; 502. fire-blocking mesh; 503. negative pressure core;

[0043] 6. Liquid inlet and outlet water structure; 601. Adjusting screw cover; 602. Spring; 603. Adjusting combined core. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the description of the embodiments of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0047] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms are not directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Combine the following Figures 1 to 9 The embodiment shown describes the technical solution of the utility model:

[0050] Example 1

[0051] An integrated valve with self-contained pressure relief and negative pressure prevention comprises a valve body, a valve core hole is provided inside, a first boss and a second boss are provided on the side wall of the valve body, a valve stem sealing structure is provided at one end of the valve core hole, an L-shaped through hole is provided on the first boss and the side wall of the valve body away from the valve stem sealing structure, and the L-shaped through hole is provided with one, the second boss is provided with a side through hole, the L-shaped through hole is not connected with the valve core hole, the side through hole is connected with the valve core hole, and a positioning hole is provided on the side through hole; a pressure relief structure is installed at one end of the L-shaped through hole close to the first boss, and the pressure is set to 0.05-0.19 MPa; a liquid inlet structure is embedded in the side through hole, and the liquid inlet structure is fixed in the side through hole through the positioning hole.

[0052] Figure 1 The three-dimensional structure diagram of the integrated valve with self-contained pressure relief and negative pressure prevention is shown as an example. Figure 2 The cross-sectional view of the integrated valve with self-pressure relief and negative pressure prevention is illustrated. It can be understood that the utility model provides an integrated valve with self-pressure relief and negative pressure prevention. The main structure of the valve is a valve body. The shape of the valve body is divided into three parts, the upper part is cylindrical, the middle part is rectangular, and the lower part is cylindrical. The first boss and the second boss are arranged on the two side walls corresponding to the rectangle. The first boss and the second boss are also arranged as cylinders. The angle between the first boss and the second boss is 180°, and the outer diameter of the first boss is smaller than the outer diameter of the second boss.

[0053] The valve stem sealing structure is arranged above the valve body, the first boss is arranged on the left side of the lower middle of the valve body, and the second boss is arranged on the right side of the middle position of the valve body;

[0054] The first boss is vertically fixedly connected to the side wall of the valve body, and an L-shaped through hole is opened between the side wall of the valve body and the first boss. The actual shape of the L-shaped through hole is a shape symmetrical with the center of "L". The part of the L-shaped through hole located on the first boss is opened at the center of the circle of the first boss. The part of the L-shaped through hole located on the side wall of the valve body is parallel to the valve core hole. The L-shaped through hole is not connected to the valve core hole. When in use, the L-shaped through hole is directly connected to the inside of the tank body;

[0055] The second boss is provided with a side through hole, which is provided at the center position of the second boss. The side through hole is a transverse horizontal through hole, and the side through hole is connected with the valve core hole, so as to facilitate setting of a liquid inlet structure. Liquid can enter the valve core hole through the liquid inlet structure, and the valve core hole is connected with the inside of the tank body.

[0056] The utility model provides an integrated valve with self-contained pressure relief and negative pressure prevention, a first boss is fixedly provided on one side wall of the valve body, an L-shaped through hole is jointly opened in the first boss and the side wall of the valve body, the L-shaped through hole is not connected to the valve core hole, but one end of the L-shaped through hole is connected to the inside of the tank body, and a pressure relief structure is provided at the other end of the L-shaped through hole, when the feeding structure is working, the pressure relief structure is not in contact with the feeding structure, but when feeding in the tank body, the pressure in the tank body is adjusted by the pressure relief structure to avoid excessive pressure in the tank body and unnecessary damage.

[0057] According to the utility model, the integrated valve with self-contained pressure relief and negative pressure prevention is provided: the valve stem sealing structure includes a valve assembly, a connecting piece, a valve stem, a pressure cap, a sealing gasket, a first O-ring, a handwheel and a hexagonal nut, the valve assembly, the connecting piece and the valve stem are embedded in one end of the valve core; the valve assembly is arranged opposite to the valve stem, and a groove is provided in the middle position of the opposite surfaces of the valve assembly and the valve stem, and the connecting piece is fixedly arranged in the groove; a sealing gasket is provided at the end of the valve stem away from the valve assembly; the pressure cap sleeve is arranged on the outside of the end of the valve body where the valve stem is arranged, the first O-ring is arranged inside the pressure cap, the handwheel is arranged at the end of the pressure cap away from the valve body, a through hole is provided in the middle of the handwheel, and the hexagonal nut is arranged in the through hole.

[0058] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the pressure cap is an inverted T-shaped cylinder, an inverted T-shaped through hole is opened in the middle of the inverted T-shaped cylinder of the pressure cap, the first O-ring is arranged at the part with smaller diameter of the inverted T-shaped through hole, and the part with larger diameter of the inverted T-shaped through hole is sleeved on the outer wall of the valve body.

[0059] In the utility model, a valve core hole connected up and down is opened in the valve body, and the shape of the valve core hole is a stepped cylindrical hole with different diameters. The valve core hole has 5 sections from top to bottom, the first section has a smaller height and a larger inner diameter, and the width and inner diameter of the first section are matched with the sealing gasket, the height of the second section is greater than the first section but the inner diameter is smaller than the first section, and a valve assembly, a connecting piece and a valve stem are arranged in the second section, one end of the valve stem is matched with the sealing gasket, a groove is opened at the end of the valve stem away from the sealing gasket, a connecting piece is arranged in the groove, and the end of the connecting piece away from the valve stem is arranged in the groove opened in the valve assembly, grooves are opened at the center positions of the opposite surfaces of the valve stem and the valve assembly, the connecting piece is a cylinder, the sum of the height of the two grooves is matched with the length of the connecting piece, and the inner diameter of the groove is matched with the outer diameter of the connecting piece.

[0060] The outer diameter of the valve stem matches the inner diameter of the second section. A cylindrical protrusion with a smaller diameter is set in the middle position of the upper end of the valve stem. The outer diameter of the protrusion matches the inner diameter of the sealing gasket. Annular pyramids are set at both ends of the protrusion. The annular pyramids function to cushion the sealing gasket. When the handwheel is tightened, the pressure cap moves downward and squeezes the sealing gasket, but does not directly contact the valve body or valve stem.

[0061] The valve assembly is a cylinder, the outer diameter of the upper end of the cylinder is slightly larger than the lower end, the outer diameter of the lower end of the valve assembly matches the third section valve core hole, the upper end of the valve assembly is provided with a groove for installing the connecting plate, the lower end of the valve assembly is provided with a retaining groove, the lowest point of the side through hole of the second boss is higher than the highest point of the fourth section valve core hole, when the bottom end of the valve assembly contacts the connection between the third section and the fourth section of the valve core hole, the valve assembly can stop the liquid from entering, and an annular pyramid is protruding along the inner wall at one end of the fourth section valve core hole close to the valve assembly, and the diameter of the annular pyramid is smaller than the inner diameter of the retaining groove of the valve assembly.

[0062] The inner diameter of the fourth valve core hole is smaller, the inner diameter of the fifth valve core hole is larger than the inner diameter of the fourth valve core hole, and the inner diameter of the fifth valve core hole is matched and connected with the liquid inlet of the tank body.

[0063] The handwheel is arranged at one end of the pressure cap away from the valve body, a through hole is opened in the middle of the handwheel, a hexagonal nut is arranged in the through hole, a first O-ring is arranged in the middle of the upper end of the pressure cap at the lower end of the hexagonal nut, and the lower end of the hexagonal nut is matched with the first O-ring and arranged in the middle position of the pressure cap.

[0064] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the L-shaped through hole includes a first through hole, a second through hole and a third through hole, the diameter of the first through hole is larger than that of the second through hole, the first through hole is horizontally concentrically connected to the second through hole, the second through hole and the third through hole have the same diameter, and the second through hole and the third through hole are vertically connected.

[0065] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the pressure relief structure includes a safety valve assembly, a spring component and a pressure regulating plug; the safety valve assembly is a T-shaped cylinder; the thick end of the T-shaped cylinder is provided with a gasket 304; the thin end of the T-shaped cylinder is provided with a pressure relief spring 305; a first vent hole is opened at the bottom of the screw in the pressure regulating plug; the first vent hole matches the larger diameter of the side T-shaped cylinder; the inner diameter of the spring component matches the smaller diameter of the side T-shaped cylinder; the spring component is arranged between the pressure regulating plug and the safety valve assembly; one end of the spring component is fixedly connected to the inner bottom wall of the first vent hole of the pressure regulating plug; the other end of the spring component is fixedly connected to the side wall of the side T-shaped cylinder at the smaller diameter.

[0066] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the outer diameter of the screw in the pressure regulating plug matches the diameter of the first through hole, the outer diameter of the head in the pressure regulating plug matches the outer diameter of the first boss, a second vent is opened in the middle of the screw head, and the second vent is connected to the first vent.

[0067] The L-shaped through hole in the utility model comprises a first through hole, a second through hole and a third through hole, the diameter of the first through hole is larger than that of the second through hole, the first through hole is horizontally and concentrically connected to the second through hole, the second through hole and the third through hole have the same diameter, and the second through hole and the third through hole are vertically connected.

[0068] The first through hole is used to install the pressure relief structure, the second through hole is used to connect the first through hole and the third through hole, and the third through hole is connected to the inside of the tank body.

[0069] The pressure relief structure includes a safety valve assembly, a spring component and a pressure regulating plug. The safety valve assembly is a T-shaped cylinder. A gasket is provided at the thick end of the T-shaped cylinder. A pressure relief spring is provided at the thin end of the T-shaped cylinder. A first vent hole is provided at the bottom of the screw in the pressure regulating plug. The first vent hole matches the larger diameter of the side T-shaped cylinder. The inner diameter of the spring component matches the smaller diameter of the side T-shaped cylinder. The spring component is provided between the pressure regulating plug and the safety valve assembly. One end of the spring component is fixedly connected to the inner bottom wall of the first vent hole of the pressure regulating plug. The other end of the spring component is fixedly connected to the side wall of the side T-shaped cylinder at the smaller diameter. The outer diameter of the screw in the pressure regulating plug matches the diameter of the first through hole. The outer diameter of the head in the pressure regulating plug matches the outer diameter of the first boss. A second vent hole is provided in the middle of the screw head. The second vent hole is connected to the first vent hole.

[0070] When working, the pressure regulating screw plug must be pulled out first. If the pressure of the inlet pressure in the tank body increases, it will drive the safety valve assembly to move to the left, thereby compressing the spring component, and the gas is discharged from the tank body through the gap between the pressure regulating screw plug and the safety valve assembly and the second vent hole of the pressure regulating screw plug head. When not working, the pressure regulating screw plug is pressed back to a state of close contact with the first boss. Under the action of the spring component, the left end of the second through hole at one end of the safety valve assembly away from the spring component contacts.

[0071] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the side through hole includes a fourth through hole, a fifth through hole and a sixth through hole, the diameter of the fourth through hole is smaller than that of the fifth through hole, the diameter of the fifth through hole is smaller than that of the sixth through hole, one end of the fourth through hole is connected to the valve core hole, the other end of the fourth through hole is connected to the fifth through hole horizontally and concentrically, and the end of the fifth through hole away from the fourth through hole is connected to the sixth through hole horizontally and concentrically.

[0072] According to the integrated valve with self-contained pressure relief and negative pressure prevention provided by the utility model: the liquid inlet structure includes a positioning pin, a connecting sleeve, a second O-ring, a third O-ring, a sealing piston, a fourth O-ring and a negative pressure spring; one end of the negative pressure spring is arranged at an end of the fourth through hole away from the valve core hole, the other end of the negative pressure spring is fixedly connected to the sealing piston, the end of the sealing piston away from the negative pressure spring is connected to the connecting sleeve, a self-closing valve is installed inside the connecting sleeve, a groove is provided at one end of the connecting sleeve close to the sealing piston, one end of the sealing piston is embedded in the groove of the connecting sleeve, a third O-ring is embedded between the side wall of the groove and the outer wall of the sealing piston close to one end of the connecting sleeve, a first annular groove is provided on the outer wall of the connecting sleeve, and the first annular groove The width of the connecting sleeve matches the diameter of the second O-ring, the second O-ring is embedded in the first annular groove, a cylindrical through hole is provided at the center of the connecting sleeve, the inner diameter of the cylindrical through hole matches the outer diameter of the fourth O-ring, the fourth O-ring is fixedly connected to the inner wall of the cylindrical through hole, and a cylindrical boss with a smaller diameter is provided at one end of the sealing piston close to the connecting sleeve, and the inner diameter of the fourth O-ring matches the outer diameter of the cylindrical boss; a third annular groove is provided on the outer side wall of the end of the connecting sleeve away from the first annular groove, the width of the third annular groove is greater than the diameter of the locating pin, the locating pin penetrates the locating hole and contacts the side wall of the third annular groove, a cylindrical through hole is provided at the center of the connecting sleeve, and a circulation hole is provided in the middle position of the sealing piston.

[0073] The middle side through holes of the utility model include a fourth through hole, a fifth through hole and a sixth through hole. The diameter of the fourth through hole is smaller than that of the fifth through hole, the diameter of the fifth through hole is smaller than that of the sixth through hole, one end of the fourth through hole is connected to the valve core hole, the other end of the fourth through hole is horizontally concentrically connected to the fifth through hole, and the end of the fifth through hole away from the fourth through hole is horizontally concentrically connected to the sixth through hole.

[0074] The liquid inlet structure includes a positioning pin, a connecting sleeve, a second O-ring, a third O-ring, a sealing piston, a fourth O-ring and a negative pressure spring; one end of the negative pressure spring is arranged at an end of the fourth through hole away from the valve core hole, the other end of the negative pressure spring is fixedly connected to the sealing piston, the end of the sealing piston away from the negative pressure spring is connected to the connecting sleeve, a self-closing valve is installed inside the connecting sleeve, a groove is provided at the end of the connecting sleeve close to the sealing piston, one end of the sealing piston is embedded in the groove of the connecting sleeve, a third O-ring is embedded between the side wall of the groove and the outer wall of the sealing piston close to the end of the connecting sleeve, a first annular groove is provided on the outer wall of the connecting sleeve, and the width of the first annular groove is the same as that of the third O-ring. The diameters of the two O-rings match each other, the second O-ring is embedded in the first annular groove, a cylindrical through hole is opened in the center of the connecting sleeve, the inner diameter of the cylindrical through hole matches the outer diameter of the fourth O-ring, the fourth O-ring is fixedly connected to the inner wall of the cylindrical through hole, a cylindrical boss with a smaller diameter is arranged at one end of the sealing piston close to the connecting sleeve, the inner diameter of the fourth O-ring matches the outer diameter of the cylindrical boss; a third annular groove is opened on the outer side wall of the end of the connecting sleeve away from the first annular groove, the width of the third annular groove is greater than the diameter of the positioning pin, the positioning pin penetrates the positioning hole and contacts the side wall of the third annular groove, and a circulation hole is opened in the middle position of the sealing piston.

[0075] The purpose of setting the second O-ring and the third O-ring is to avoid noise generated when parts move when liquid is introduced. The inner wall of the fourth O-ring connecting sleeve is fixedly connected to the spring. When the sealing piston receives liquid pressure, the sealing piston can be compressed to the left. The liquid can enter the tank through the gap between the sealing piston and the connecting sleeve and the flow hole in the middle of the sealing piston. The hollow structure in the middle of the connecting sleeve is convenient for connecting with the liquid fuel discharge end. When the liquid is stopped, the sealing piston is no longer subjected to the pressure of the liquid fuel and will return to its original state, achieving a sealing effect under the action of the fourth O-ring.

[0076] Example 2

[0077] A one-piece valve with self-contained pressure relief and negative pressure prevention, comprising a valve body, a valve core hole formed therein, a first boss and a second boss formed on the side wall of the valve body, a valve stem sealing structure formed at one end of the valve core hole, an L-shaped through hole formed on the first boss and the side wall of the valve body away from the valve stem sealing structure, and two L-shaped through holes are formed, a side through hole is formed on the second boss, the L-shaped through hole is not connected to the valve core hole, the side through hole is connected to the valve core hole, and a positioning hole is formed on the side through hole; a pressure relief structure and a one-way air intake structure are respectively installed on one end of the two L-shaped through holes close to the first boss; a liquid inlet structure is embedded in the side through hole, and the liquid inlet structure is fixed in the side through hole through the positioning hole.

[0078] According to the integrated valve with self-pressure relief and negative pressure prevention provided by the utility model: the one-way air intake structure includes a gland, a fire-blocking mesh and a negative pressure core, the fire-blocking mesh is installed on the inner side of the gland, and the negative pressure core is installed on the inner side of the fire-blocking mesh.

[0079] When the gas flows out of the tank, the one-way air intake structure opens under the action of the negative pressure core; when the gas enters the tank, the one-way air intake structure closes under the action of the negative pressure core to ensure that the gas in the tank always remains in a positive pressure state. The design of the fire-blocking mesh further improves the safety of the valve body. The one-way air intake structure avoids excessive consumption of gas in the tank, thereby saving energy.

[0080] Example 3

[0081] A one-piece valve with self-contained pressure relief and negative pressure prevention comprises a valve body, a valve core hole is provided inside, a first boss and a second boss are provided on the side wall of the valve body, a valve stem sealing structure is provided at one end of the valve core hole, an L-shaped through hole is provided on the first boss and the side wall of the valve body away from the valve stem sealing structure, and three L-shaped through holes are provided, a side through hole is provided on the second boss, the L-shaped through hole is not connected with the valve core hole, the side through hole is connected with the valve core hole, and a positioning hole is provided on the side through hole; a pressure relief structure, a one-way air intake structure and a liquid inlet and outlet water structure are respectively installed at one end of the three L-shaped through holes close to the first boss; a liquid inlet structure is embedded in the side through hole, and the liquid inlet structure is fixed in the side through hole through the positioning hole.

[0082] According to the integrated valve with self-pressure relief and negative pressure prevention provided by the utility model: the liquid inlet and outlet structure includes an adjusting screw cover, a spring and an adjusting combined core, the adjusting combined core is arranged at one end close to the L-shaped through hole, the adjusting screw cover is arranged at one end away from the L-shaped through hole, and the spring is installed inside the adjusting screw cover;

[0083] In this embodiment, a spring-type self-closing valve is provided in the liquid inlet structure.

[0084] The working principle of the utility model is as follows: when liquid is introduced, the hand wheel is first rotated to raise the valve assembly, and half of the pressure regulating screw plug is pulled out. After the bottom end of the valve assembly is higher than the lowest point of the side through hole, the liquid fuel can enter through the liquid inlet. Under the forward pressure of the liquid fuel, the negative pressure spring is compressed to move to the left, and a gap is generated between the connecting sleeve and the sealing piston. The liquid fuel flows into the flow hole in the middle of the sealing piston through the gap and the gap between the sealing piston, and then flows into the valve core hole, thereby reaching the inside of the tank body. After the liquid fuel enters the inside of the tank body from the left side, the pressure in the tank body will gradually increase, and the gas in the tank body will squeeze the safety valve assembly to compress the spring part to the left, and the gas passes The gap between the safety valve assembly and the pressure regulating plug leads to the tank body, and when the external temperature is too high and the internal pressure of the tank is too high, the pressure relief structure can achieve pressure relief based on the same principle. When liquid fuel is no longer introduced or the pressure in the tank is stable, the sealing piston will return to its initial state under the action of the negative pressure spring to achieve a sealing effect. The pressure regulating plug is pressed until the right end of the screw head contacts the left end of the first boss, and the safety valve assembly contacts the left end of the second through hole under the action of the spring member to stop pressure relief. When the liquid is discharged, if negative pressure occurs in the tank, the pressure relief structure will open based on the pressure difference and introduce external air into the tank to balance the pressure and prevent negative pressure.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 utility model.

Claims

1. An integrated valve with self-release and negative pressure prevention function, comprising a valve body, characterized in that: A valve body, with a valve core hole formed therein, a first boss and a second boss formed on the side wall of the valve body, a valve stem sealing structure formed on one end of the valve core hole, an L-shaped through hole formed on the first boss and the side wall of the valve body away from the valve stem sealing structure, and at least one L-shaped through hole is formed, a side through hole formed on the second boss, the L-shaped through hole is not connected to the valve core hole, the side through hole is connected to the valve core hole, and a positioning hole is formed on the side through hole; The end of the L-shaped through hole close to the first boss is equipped with a pressure relief structure, a one-way air intake structure and a liquid inlet and outlet structure; The liquid inlet structure is embedded in the side through hole, and the liquid inlet structure is fixed in the side through hole through the positioning hole.

2. The integrated valve with self-pressure relief and negative pressure prevention according to claim 1, characterized in that: The valve stem sealing structure comprises a valve assembly, a connecting piece, a valve stem, a pressure cap, a sealing gasket, a first O-ring, a hand wheel and a hexagonal nut, wherein the valve assembly, the connecting piece and the valve stem are embedded at one end of the valve core; The valve assembly is arranged opposite to the valve stem, a groove is provided in the middle of the opposite surfaces of the valve assembly and the valve stem, and the connecting piece is fixedly arranged in the groove; A sealing gasket is provided at one end of the valve stem away from the valve assembly; The pressure cap is sleeved on the outside of one end of the valve body where the valve stem is provided, the first O-ring is provided inside the pressure cap, the handwheel is provided on the end of the pressure cap away from the valve body, a through hole is provided in the middle of the handwheel, and the hexagonal nut is provided in the through hole.

3. The integrated valve with self-pressure relief and negative pressure prevention according to claim 2, characterized in that: The pressure cap is an inverted T-shaped cylinder with an inverted T-shaped through hole in the middle. The first O-ring is arranged on the smaller diameter portion of the inverted T-shaped through hole, and the larger diameter portion of the inverted T-shaped through hole is sleeved on the outer wall of the valve body.

4. The integrated valve with self-pressure relief and negative pressure prevention according to claim 1, characterized in that: The L-shaped through hole includes a first through hole, a second through hole and a third through hole. The diameter of the first through hole is larger than that of the second through hole. The first through hole is horizontally and concentrically connected to the second through hole. The second through hole and the third through hole have the same diameter. The second through hole and the third through hole are vertically connected.

5. The integrated valve with self-pressure relief and negative pressure prevention according to claim 4, characterized in that: The pressure relief structure includes a safety valve assembly, a spring component and a pressure regulating plug. The safety valve assembly is a T-shaped cylinder. A gasket is provided at the thick end of the T-shaped cylinder. A pressure relief spring is provided at the thin end of the T-shaped cylinder. A first vent hole is provided on the screw in the pressure regulating plug. The first vent hole matches the larger diameter of the T-shaped cylinder. The inner diameter of the spring component matches the smaller diameter of the T-shaped cylinder. The spring component is arranged between the pressure regulating plug and the safety valve assembly. One end of the spring component is fixedly connected to the inner bottom wall of the first vent hole of the pressure regulating plug, and the other end of the spring component is fixedly connected to the side wall of the T-shaped cylinder at the smaller diameter.

6. The integrated valve with self-pressure relief and negative pressure prevention according to claim 5, characterized in that: The outer diameter of the screw in the pressure regulating plug matches the diameter of the first through hole, the outer diameter of the head in the pressure regulating plug matches the outer diameter of the first boss, a second vent hole is opened in the middle of the head in the pressure regulating plug, and the second vent hole is connected to the first vent hole.

7. The integrated valve with self-pressure relief and negative pressure prevention according to claim 1, characterized in that: The side through hole includes a fourth through hole, a fifth through hole and a sixth through hole, the diameter of the fourth through hole is smaller than that of the fifth through hole, the diameter of the fifth through hole is smaller than that of the sixth through hole, one end of the fourth through hole is connected to the valve core hole, the other end of the fourth through hole is horizontally concentrically connected to the fifth through hole, and the end of the fifth through hole away from the fourth through hole is horizontally concentrically connected to the sixth through hole.

8. The integrated valve with self-pressure relief and negative pressure prevention according to claim 7, characterized in that: The liquid inlet structure includes a positioning pin, a connecting sleeve, a second O-ring, a third O-ring, a sealing piston, a fourth O-ring and a negative pressure spring; One end of the negative pressure spring is arranged at the end of the fourth through hole away from the valve core hole, the other end of the negative pressure spring is fixedly connected to the sealing piston, the end of the sealing piston away from the negative pressure spring is connected to the connecting sleeve, a self-closing valve is installed inside the connecting sleeve, a groove is provided at the end of the connecting sleeve close to the sealing piston, one end of the sealing piston is embedded in the groove of the connecting sleeve, a third O-ring is embedded between the side wall of the groove and the outer wall of the sealing piston close to one end of the connecting sleeve, a first annular groove is provided on the outer wall of the connecting sleeve, the width of the first annular groove matches the diameter of the second O-ring, the second O-ring is embedded in the first annular groove, a cylindrical through hole is provided in the center of the connecting sleeve, the inner diameter of the cylindrical through hole matches the outer diameter of the fourth O-ring, the fourth O-ring is fixedly connected to the inner wall of the cylindrical through hole, a cylindrical boss with a smaller diameter is provided at the end of the sealing piston close to the connecting sleeve, the inner diameter of the fourth O-ring matches the outer diameter of the cylindrical boss; A third annular groove is provided on the outer side wall of one end of the connecting sleeve away from the first annular groove, the width of the third annular groove is greater than the diameter of the positioning pin, the positioning pin penetrates the positioning hole and contacts the side wall of the third annular groove, and a circulation hole is provided in the middle position of the sealing piston.

9. The integrated valve with self-pressure relief and negative pressure prevention according to claim 1, characterized in that: The one-way air intake structure comprises a gland, a fire-blocking mesh and a negative pressure core. The fire-blocking mesh is installed on the inner side of the gland, and the negative pressure core is installed on the inner side of the fire-blocking mesh.

10. The integrated valve with self-pressure relief and negative pressure prevention according to claim 1, characterized in that: The liquid inlet and outlet structure includes an adjusting screw cover, a spring and an adjusting assembly core, wherein the adjusting assembly core is arranged at one end close to the L-shaped through hole, the adjusting screw cover is arranged at one end away from the L-shaped through hole, and the spring is installed inside the adjusting screw cover.

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