1. The utility model provides an exhaust pressure relief valve, includes that valve cap (1), pressure spring (2), release case (3), the sealed pad of release (4), exhaust case (5), exhaust sealing washer (6), valve body (8) and connecting pipe (9), its characterized in that: the valve cap (1) is installed on the valve body (8) through threads, the pressure relief sealing gasket (4) is pressed tightly on the upper end face of the valve body (8) through the pressure relief valve core (3) by the pressure spring (2) in the valve cap (1), the exhaust valve core (5) is installed in an exhaust central hole of the pressure relief valve core (3), and the connecting pipe (9) is installed below the valve body (8).

2. An exhaust pressure relief valve according to claim 1, wherein: an air outlet hole is formed in the upper end of the valve cap (1), an internal thread hole in the lower end of the valve cap (1) is connected with an external thread in the upper end of the valve body (8), and the pressure of pressure relief is adjusted according to the screwing amount of the threads.

3. An exhaust pressure relief valve according to claim 1, wherein: the outer circle of the upper end of the valve body (8) is provided with an external thread, the center of the valve body (8) is provided with a pressure relief center hole, the upper end surface of the valve body (8) is a conical surface, the conical top is an arc top, and a pressure relief sealing gasket (4) is pressed on the arc top of the upper end surface of the valve body (8) through a pressure relief valve core (3) by a pressure spring (2) in the valve cap (1).

4. An exhaust pressure relief valve according to claim 1, wherein: the pressure relief valve is characterized in that a step is arranged on the outer circle of the upper end of the pressure relief valve core (3), the upper end of the step is sleeved with a pressure (2), a pressure relief sealing gasket (4) is fixed at the lower end of the step, the lower end of the pressure relief valve core (3) is a cylindrical surface, the cylindrical surface is in clearance fit with a pressure relief central hole of the valve body (8), and an exhaust central hole is formed in the center of the pressure relief valve core (3).

5. An exhaust pressure relief valve according to claim 1, wherein: the exhaust valve core (5) is of a cylindrical structure, the excircle of the exhaust valve core (5) is in clearance fit with an exhaust center hole of the pressure relief valve core (3), a sealing groove is formed in the excircle of the lower end of the exhaust valve core (5), an exhaust sealing ring (6) is installed in the sealing groove, and the exhaust valve core (5) is arranged on an internal tooth retaining ring (7).

6. An exhaust pressure relief valve according to claim 1, wherein: the vertical section of the exhaust valve core (5) is of an inverted T-shaped structure, the excircle at the upper end of the exhaust valve core (5) is in clearance fit with an exhaust center hole of the pressure relief valve core (3), an exhaust sealing ring (6) is sleeved on the excircle at the lower end of the exhaust valve core (5), the exhaust sealing ring (6) is abutted to the step at the lower end of the exhaust valve core (5), and the exhaust valve core (5) is arranged on an internal tooth retainer ring (7).

7. An exhaust pressure relief valve according to claim 1, wherein: the vertical section of the exhaust valve core (5) is of a T-shaped structure, a blind hole is formed in the center of the top of the exhaust valve core (5), a radial hole communicated with the blind hole is formed in the outer circle of the lower end of the exhaust valve core (5), a sealing groove is formed in the outer circle below the radial hole of the exhaust valve core (5), an exhaust sealing ring (6) is installed in the sealing groove, the outer circle of the lower end of the exhaust valve core (5) is in clearance fit with an exhaust center hole of a pressure relief valve core (3), and the step at the upper end of the exhaust valve core (5) is abutted to the exhaust center hole of the pressure relief valve core (3).

8. An exhaust pressure relief valve according to claim 1, wherein: one end of the connecting pipe (9) is arranged on the container, the valve body (8) is arranged at the other end of the connecting pipe, and gas in the container enters the valve body (8) through the connecting pipe (9).

Background

When the container is exhausted, pressure-maintaining and safe pressure relief, an exhaust valve and a pressure relief valve are usually adopted to be matched with each other, the exhaust valve is used for exhausting gas in the closed container, the pressure relief valve is used for enabling the inside of the closed container to be within a certain pressure range, and the pressure relief valve is opened for pressure relief when the internal pressure of the closed container exceeds a set value.

The existing closed container needs to be provided with two mounting holes, and an exhaust valve and a pressure relief valve are respectively mounted on the two mounting holes, so that the two valves occupy larger space, the production cost is high, and the leakage points are more.

Therefore, it is necessary to design an exhaust relief valve to solve the above problems.

Disclosure of Invention

The invention provides an exhaust pressure relief valve, which solves the problems of large occupied space, high cost and more leakage points when two valves are installed in the conventional closed container.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an exhaust pressure relief valve, includes the valve cap, the pressure spring, the release case, the sealed pad of release, the exhaust case, the exhaust sealing washer, the valve body and connecting pipe, and the valve cap passes through the screw thread and installs on the valve body, and the pressure spring in the valve cap passes through the release case and presses the sealed upper end face of pressing the release on the valve body, and the exhaust case is installed in the exhaust centre bore of release case, and the connecting pipe is installed in the below of valve body.

Preferably, the upper end of the valve cap is provided with an air outlet, an internal thread hole at the lower end of the valve cap is connected with an external thread at the upper end of the valve body, and the pressure of pressure relief is adjusted through the screwing amount of the threads.

Preferably, the excircle of the upper end of the valve body is provided with an external thread, the center of the valve body is provided with a pressure relief central hole, the upper end surface of the valve body is a conical surface, the conical top is an arc top, and a pressure spring in the valve cap presses the pressure relief sealing gasket on the arc top of the upper end surface of the valve body through the pressure relief valve core.

Preferably, a step is arranged on the excircle of the upper end of the pressure relief valve core, is pressed on the upper end of the step in a sleeved mode, a pressure relief sealing gasket is fixed at the lower end of the step, the lower end of the pressure relief valve core is a cylindrical surface, the cylindrical surface is in clearance fit with a pressure relief central hole of the valve body, and an exhaust central hole is formed in the center of the pressure relief valve core.

Preferably, the exhaust valve core is of a cylindrical structure, the outer circle of the exhaust valve core is in clearance fit with the exhaust center hole of the pressure relief valve core, a sealing groove is formed in the outer circle of the lower end of the exhaust valve core, an exhaust sealing ring is installed in the sealing groove, and the exhaust valve core is arranged on the inner gear retaining ring.

Preferably, the vertical section of the exhaust valve core is of an inverted T-shaped structure, the excircle at the upper end of the exhaust valve core is in clearance fit with the exhaust center hole of the pressure relief valve core, the excircle at the lower end of the exhaust valve core is sleeved with an exhaust sealing ring, the exhaust sealing ring is abutted against the step at the lower end of the exhaust valve core, and the exhaust valve core is arranged on an inner gear retaining ring.

Preferably, the vertical section of the exhaust valve core is of a T-shaped structure, a blind hole is formed in the center of the top of the exhaust valve core, a radial hole communicated with the blind hole is formed in the outer circle of the lower end of the exhaust valve core, a sealing groove is formed in the outer circle below the radial hole of the exhaust valve core, an exhaust sealing ring is installed in the sealing groove, the outer circle of the lower end of the exhaust valve core is in clearance fit with an exhaust central hole of the pressure relief valve core, and a step at the upper end of the exhaust valve core is abutted to the exhaust central hole of the pressure relief valve core.

Preferably, one end of the connecting pipe is arranged on the container, the other end of the connecting pipe is provided with the valve body, and gas in the container enters the valve body through the connecting pipe.

The invention has the beneficial effects that:

1. the integrated exhaust pressure relief valve realizes triple functions of exhaust, pressure maintaining and overpressure protection in the closed container, and the existing two valves of an exhaust valve and a pressure relief valve are replaced by the integrated structure, so that the occupied space of the valves is reduced, and the manufacturing cost of the closed container is reduced;

2. the exhaust pressure relief valve of integral type has reduced the quantity of trompil on the closed container, has reduced the leakage point, has improved closed container sealing performance, has prolonged closed container's life, and the integral type design makes product elegant appearance, and is not fragile, and the installation is swift, and the maintenance is changed conveniently, has good market perspective, is particularly useful for the electric steam ager of culinary art, electric boiling box or the integrative product of cooking, also is applicable to equipment such as the reation kettle of manufacturing simultaneously.

Drawings

FIG. 1 is an isometric view of an exhaust relief valve according to the present invention.

Fig. 2 is a schematic structural diagram of an exhaust pressure relief valve according to the present invention.

Fig. 3 is a schematic diagram of a position relationship between a pressure relief valve core and an exhaust valve core under an exhaust condition of the exhaust pressure relief valve according to the present invention.

Fig. 4 is a schematic diagram of a position relationship between a pressure relief valve core and an exhaust valve core of the exhaust pressure relief valve under a pressure maintaining condition according to the present invention.

Fig. 5 is a schematic diagram of a position relationship between a pressure relief valve core and an exhaust valve core under an overpressure condition of the exhaust pressure relief valve according to the present invention.

Fig. 6 is a schematic structural diagram of a second embodiment of an exhaust pressure relief valve according to the present invention.

Fig. 7 is a schematic structural diagram of a third embodiment of an exhaust pressure relief valve according to the present invention.

Reference numbers in the figures: the valve comprises a valve cap 1, a pressure spring 2, a pressure relief valve core 3, a pressure relief sealing gasket 4, an exhaust valve core 5, an exhaust sealing ring 6, an internal tooth retainer ring 7, a valve body 8 and a connecting pipe 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The first embodiment is as follows: referring to fig. 1-5, an exhaust pressure relief valve comprises a valve cap 1, a pressure spring 2, a pressure relief valve core 3, a pressure relief gasket 4, an exhaust valve core 5, an exhaust seal ring 6, an internal tooth retainer ring 7, a valve body 8 and a connecting pipe 9, wherein an air outlet is arranged at the upper end of the valve cap 1, an internal thread hole at the lower end of the valve cap 1 is connected with an external thread at the upper end of the valve body 8, the pressure relief pressure is adjusted by screwing in the internal thread hole, an external thread is arranged on the excircle at the upper end of the valve body 8, a pressure relief center hole is arranged at the center of the valve body 8, the upper end surface of the valve body 8 is a conical surface, the conical top is an arc top, the pressure relief gasket 4 is pressed tightly on the arc top at the upper end surface of the valve body 8 by the pressure relief valve core 2 in the valve cap 1 through the pressure relief valve core 3, a step is arranged on the excircle at the upper end of the step, the pressure relief valve core 3 is sleeved with the pressure 2, the pressure relief gasket 4, the pressure relief seal is fixed at the lower end of the step, the cylindrical surface is a cylindrical surface, and is in clearance fit with the pressure relief center hole of the valve body 8, the center of the pressure relief valve core 3 is provided with an exhaust center hole, the exhaust valve core 5 is of a cylindrical structure, the excircle of the exhaust valve core 5 is in clearance fit with the exhaust center hole of the pressure relief valve core 3, the outer circle of the lower end of the exhaust valve core 5 is provided with a sealing groove, an exhaust sealing ring 6 is installed in the sealing groove, the exhaust valve core 5 is arranged on an internal tooth retainer ring 7, one end of a connecting pipe 9 is installed on a container, the other end of the connecting pipe is provided with a valve body 8, and gas in the container enters the valve body 8 through the connecting pipe 9.

The working principle is as follows:

and (3) exhausting state: referring to fig. 1, 2 and 3, as the pressure inside the container increases, the pressure inside the container is higher than the pressure outside the container, but the pressure inside the container cannot lift the vent valve core 5 and the vent sealing ring 6, and when the vent valve core 5 is still at the position shown in fig. 3, the gas is discharged out of the container through the connecting pipe 9, the tooth gap of the internal tooth retainer 7, the gap between the vent central hole of the pressure relief valve core 3 and the vent valve core 5, and the vent hole of the valve cap 3.

And (3) boosting and pressure maintaining state: the closed container does not need fluid to be discharged in the working process, and the container needs pressure boosting or pressure maintaining, referring to fig. 1, fig. 2 and fig. 4, along with the increase of the pressure inside the container, the pressure inside the container can overcome the gravity of the exhaust valve core 5 and the exhaust sealing ring 6, the exhaust valve core 5 is lifted to drive the exhaust sealing ring 6 to block the gap between the exhaust central hole of the pressure relief valve core 3 and the exhaust valve core 5, but the pressure inside the container cannot overcome the pressure of the pressure spring 2 on the pressure relief valve core 3, when the pressure relief valve core 3 is still at the position shown in fig. 4, the fluid inside the container cannot be discharged, and the container is in a pressure boosting or pressure maintaining state.

Overpressure pressure relief state: the pressure in the closed container is overhigh in the working process, the pressure in the container can overcome the pressure of the pressure spring 2 on the pressure relief valve core 3 as the pressure in the container is further increased, the pressure relief valve core 3 and the pressure relief sealing gasket 4 are lifted, as shown in fig. 5, the fluid in the container is discharged out of the container through a connecting pipe 9, a tooth gap of an internal tooth retaining ring 7, a pressure relief central hole of a valve body 8, a gap between the pressure relief sealing gasket 4 and an arc top of the upper end surface of the valve body 8 and an air outlet hole of a valve cap 1, the pressure in the container is reduced when the discharged fluid is larger than the amount generated in the container, the pressure relief valve core 3 and the pressure relief sealing gasket 4 fall back to the arc top of the upper end surface of the valve body 8 to press a pressure relief channel when the pressure in the container is reduced to be balanced with the pressure of the pressure spring 2, the pressure in the closed container is ensured to be stabilized within a set range, and the pressure for pressure relief can be adjusted by the screwing amount of the internal thread hole at the lower end of the valve cap 1 and the external thread at the upper end of the valve body 8.

Example two: referring to fig. 6, the difference between the first embodiment and the second embodiment is that the vertical cross section of the exhaust valve core 5 is of an inverted T-shaped structure, the outer circle of the upper end of the exhaust valve core 5 is in clearance fit with the exhaust center hole of the pressure relief valve core 3, the outer circle of the lower end of the exhaust valve core 5 is sleeved with an exhaust sealing ring 6, the exhaust sealing ring 6 is abutted against the step of the lower end of the exhaust valve core 5, and the exhaust valve core 5 is arranged on an internal tooth retainer ring 7.

Example three: referring to fig. 7, the difference between the first embodiment and the second embodiment is that the vertical cross section of the exhaust valve core 5 is a T-shaped structure, a blind hole is formed in the center of the top of the exhaust valve core 5, a radial hole communicated with the blind hole is formed in the outer circle of the lower end of the exhaust valve core 5, a sealing groove is formed in the outer circle below the radial hole of the exhaust valve core 5, an exhaust sealing ring 6 is installed in the sealing groove, the outer circle of the lower end of the exhaust valve core 5 is in clearance fit with the exhaust central hole of the pressure relief valve core 3, the step at the upper end of the exhaust valve core 5 is abutted to the exhaust central hole of the pressure relief valve core 3, an internal tooth retainer ring 7 is not needed, and gas is exhausted out of the container through a connecting pipe 9, a hole between the exhaust central hole of the pressure relief valve core 3 and the exhaust central hole of the exhaust valve core 5, and an air outlet hole of the valve cap 3.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.