Pressure relief structure of pressure retaining valve for cleaning machine

Abstract

The utility model relates to the technical field of pressure retaining valves, and discloses a pressure relief structure of a pressure retaining valve for a cleaning machine, which comprises a pressure retaining shell, a pressure retaining cover mounted at the top of the pressure retaining shell, a pressure retaining valve rod penetrating through the pressure retaining shell and a pressure retaining cover cavity, a pressure retaining valve cover fixedly arranged at the top of the pressure retaining valve rod, and a pressure retaining check block fixedly arranged at the top of the pressure retaining valve cover, a flow blocking groove is formed between the pressure maintaining check block and the pressure maintaining valve deck. The pressure maintaining open hole is formed in the surface of the pressure maintaining check block and communicates with the inner cavity of the pressure maintaining valve rod, and a flow drainage groove is formed in an opening of the pressure maintaining open hole and located between the pressure maintaining open hole and the flow blocking groove. In order to avoid the dangerous situation caused by gradual increase of the distance, when the pressure value in the system exceeds a certain range, fluid can enter the pressure maintaining valve rod cavity along the pressure maintaining open hole and is finally released and discharged outwards from the pressure relief hole, so that the pressure in the valve body is reduced, the situation of equipment damage is reduced, and certain safety guarantee is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipes, in particular to a pressure relief structure of a pressure-maintaining valve for a cleaning machine. Background Art

[0002] The pressure-maintaining valve is a commonly used component in household cleaning machines. The valve is mainly used to control the flow of liquid media and is widely used in pipelines of tap water, petroleum and other media. The liquid medium in the pipeline is interrupted by opening and closing the valve. The pressure-maintaining valve is a pressure-maintaining device that can close the valve according to the pressure value when the valve is working, thereby achieving a pressure-maintaining effect and facilitating subsequent recycling and processing.

[0003] For the pressure-maintaining valve used in cleaning machines, the fluid medium moves through the valve body. When the power is off, the spring will prevent the valve body from continuing to discharge outward, thus forming a closure. As the fluid accumulates, the pressure in the valve body will increase. The lack of a pressure relief structure will cause the pressure in the valve body to be too high, which can easily cause damage to equipment and personnel. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pressure-relieving structure of a pressure-maintaining valve for a cleaning machine, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] It includes: a pressure-maintaining shell, a pressure-maintaining cover installed on the top of the pressure-maintaining shell, and a pressure-maintaining valve stem passing through the pressure-maintaining shell and the pressure-maintaining cover cavity.

[0007] Also includes:

[0008] The pressure-maintaining valve cover is fixedly arranged on the top of the pressure-maintaining valve stem, a pressure-maintaining stopper is fixedly arranged on the top of the pressure-maintaining valve cover, and a flow-blocking groove is arranged between the pressure-maintaining stopper and the pressure-maintaining valve cover;

[0009] The pressure-maintaining opening is formed on the surface of the pressure-maintaining stopper, the pressure-maintaining opening is connected to the inner cavity of the pressure-maintaining valve stem, a discharge groove is formed at the opening of the pressure-maintaining opening, and the discharge groove is located between the pressure-maintaining opening and the flow-blocking groove.

[0010] Furthermore, a limiting slot is provided on the outer wall of the pressure retaining cover, and a shell limiting block which is inserted into the limiting slot is fixedly provided on the outer wall of the pressure retaining shell.

[0011] Furthermore, a small pressure ring is arranged in the cavity of the pressure-maintaining shell, and the pressure-maintaining valve stem passes through the inside of the small pressure ring and extends downward.

[0012] Furthermore, a small sealing ring is installed between the inner bottom wall of the pressure retaining shell and the small pressure ring.

[0013] Furthermore, a slot is provided on the outer wall of the pressure retaining shell, and a large sealing ring is installed in the slot.

[0014] Furthermore, a pressure-maintaining spring is provided on the outer sleeve of the pressure-maintaining valve stem, the top end of the pressure-maintaining spring is connected to the bottom of the pressure-maintaining valve cover, and the bottom of the pressure-maintaining spring is connected to the upper part of the small pressure ring.

[0015] Furthermore, a flow discharge hole is provided on the surface of the lower half of the pressure-maintaining valve stem, and a pressure discharge hole communicating with the pressure-maintaining shell cavity is provided on the outer wall of the pressure-maintaining shell.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The present application relies on the elastic drive of the pressure-maintaining spring to make the pressure-maintaining block at the front end of the pressure-maintaining valve cover press against the valve outlet, so that the valve is automatically closed, which greatly reduces fluid leakage. At the same time, in order to avoid dangerous situations caused by gradual increase in pressure, when the pressure value in the system exceeds a certain range, the fluid will enter the pressure-maintaining valve stem cavity along the pressure-maintaining opening, and finally be released and discharged outward from the pressure relief hole, thereby reducing the pressure in the valve body, reducing equipment damage, and improving certain safety guarantees. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 This is the internal diagram of the pressure retaining shell of the utility model;

[0021] Figure 4 This is an enlarged view of the pressure-maintaining opening of the utility model.

[0022] In the figure: 1. pressure-maintaining shell; 2. pressure-maintaining cover; 3. limiting slot; 4. shell limiting block; 5. pressure-maintaining valve stem; 6. pressure-maintaining spring; 7. small pressure ring; 8. small sealing ring; 9. large sealing ring; 10. pressure-maintaining valve cover; 11. flow-blocking groove; 12. pressure-maintaining stopper; 13. pressure-maintaining opening; 14. pressure relief hole; 15. discharge hole; 16. discharge groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0024] See also Figure 1-4, including: a pressure-maintaining shell 1, a pressure-maintaining cover 2 installed on the top of the pressure-maintaining shell 1, and a pressure-maintaining valve stem 5 inserted into the cavity of the pressure-maintaining shell 1 and the pressure-maintaining cover 2. The pressure-maintaining shell 1 and the pressure-maintaining cover 2 are combined with the valve body and placed in the valve body. The front end of the pressure-maintaining shell 1 faces the fluid outlet of the valve body. The pressure-maintaining stopper 12 at the front of the pressure-maintaining shell 1 is used to block and close the outlet of the valve body to isolate the fluid from continuous fluid discharge and maintain the stability of the cleaning machine after power failure.

[0025] The pressure-maintaining valve cover 10 is fixedly arranged on the top of the pressure-maintaining valve stem 5, and a pressure-maintaining stopper 12 is fixedly arranged on the top of the pressure-maintaining valve cover 10. A choke groove 11 is arranged between the pressure-maintaining stopper 12 and the pressure-maintaining valve cover 10. The choke groove 11 is an annular groove, and when the pressure-maintaining stopper 12 blocks the valve body outlet, the pressure-maintaining stopper 12 is completely immersed in the outlet, so that the choke groove 11 is exposed. As the fluid continues to increase, the pressure in the valve body gradually increases. In order to avoid the dangerous situation caused by high pressure, when the fluid pressure reaches a certain value, the fluid will drive the choke groove 11 to move, and an opening adapted to the pressure-maintaining valve cover 10 is arranged at the port of the pressure-maintaining cover 2. The choke groove 11 is driven by the fluid to move the choke groove 11 in the opening of the pressure-maintaining cover 2, so that the pressure-maintaining stopper 12 recovers a part from the valve body outlet, and a pressure-maintaining opening is opened on the bottom surface of the pressure-maintaining stopper 12 13, so that the fluid enters the pressure-maintaining opening 13, and the pressure-maintaining valve stem 5 adopts a cavity design, so that the fluid enters the pressure-maintaining valve stem 5 along the pressure-maintaining opening 13; and a leakage hole 15 is provided on the surface of the lower half of the pressure-maintaining valve stem 5, and a pressure relief hole 14 is provided on the outer wall of the pressure-maintaining shell 1, and the pressure relief hole 14 is connected with the cavity of the pressure-maintaining shell 1, so that the fluid entering the pressure-maintaining valve stem 5 is discharged from the leakage hole 15, and discharged from the pressure relief hole 14, thereby playing a role in pressure relief, a leakage groove 16 is provided at the opening of the pressure-maintaining opening 13, and the leakage groove 16 is located between the pressure-maintaining opening 13 and the choke groove 11, as the pressure-maintaining stopper 12 is gradually withdrawn from the valve body outlet, the fluid enters the pressure-maintaining opening 13 along the groove of the leakage groove 16, and the opening of the leakage groove 16 close to the choke groove 11 is smaller, so it can play a role in slow pressure relief.

[0026] The outer wall of the pressure-maintaining cover 2 is provided with a limiting slot 3, and the outer wall of the pressure-maintaining shell 1 is fixedly provided with a shell limiting block 4 that is inserted into the limiting slot 3. The shell limiting block 4 is inserted into the limiting slot 3 to limit the connection between the pressure-maintaining shell 1 and the pressure-maintaining cover 2. A small pressure ring 7 is provided in the cavity of the pressure-maintaining shell 1, and the pressure-maintaining valve stem 5 is passed through the inside of the small pressure ring 7 and extends downward. A small sealing ring 8 is installed between the inner bottom wall of the pressure-maintaining shell 1 and the small pressure ring 7, and a slot is provided on the outer wall of the pressure-maintaining shell 1, and a large sealing ring 9 is installed in the slot. Due to the action of the small sealing ring 8 and the large sealing ring 9, the connection between the entire structure and the valve body is more tightly sealed to avoid affecting the fluid movement of the valve body and improve the service life of the cleaning machine.

[0027] The outer sleeve of the pressure-maintaining valve stem 5 is provided with a pressure-maintaining spring 6, the top of the pressure-maintaining spring 6 is connected to the bottom of the pressure-maintaining valve cover 10, and the bottom of the pressure-maintaining spring 6 is connected to the upper part of the small pressure ring 7. After the valve body is powered off, in order to prevent the fluid from continuing to move, the elastic action of the pressure-maintaining spring 6 pushes the pressure-maintaining valve cover 10 to move in the opening of the pressure-maintaining cover 2, so that the pressure-maintaining stopper 12 can be extended into the outlet of the valve body to complete the closure of the valve body, greatly reducing the leakage of the fluid. At the same time, in order to avoid the dangerous situation caused by the gradual increase in distance, when the pressure value in the system exceeds a certain range, the fluid will enter the cavity of the pressure-maintaining valve stem 5 along the pressure-maintaining opening 13, and finally be released and discharged outward from the pressure relief hole 14, thereby reducing the pressure in the valve body, reducing the damage to the equipment, and improving a certain safety guarantee.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure relief structure of a pressure-maintaining valve for a cleaning machine, comprising: A pressure retaining shell (1), a pressure retaining cover (2) mounted on the top of the pressure retaining shell (1), and a pressure retaining valve stem (5) inserted into the cavities of the pressure retaining shell (1) and the pressure retaining cover (2). It is characterized by further comprising: A pressure-maintaining valve cover (10) is fixedly mounted on the top of the pressure-maintaining valve stem (5); a pressure-maintaining stopper (12) is fixedly mounted on the top of the pressure-maintaining valve cover (10); and a flow-blocking groove (11) is arranged between the pressure-maintaining stopper (12) and the pressure-maintaining valve cover (10); A pressure-maintaining opening (13) is provided on the surface of the pressure-maintaining stopper (12), the pressure-maintaining opening (13) is communicated with the inner cavity of the pressure-maintaining valve stem (5), a discharge groove (16) is provided at the opening of the pressure-maintaining opening (13), and the discharge groove (16) is located between the pressure-maintaining opening (13) and the flow-blocking groove (11).

2. A pressure relief structure of a pressure-maintaining valve for a cleaning machine according to claim 1, characterized in that: The outer wall of the pressure retaining cover (2) is provided with a limiting slot (3), and the outer wall of the pressure retaining shell (1) is fixedly provided with a shell limiting block (4) which is inserted into the limiting slot (3).

3. A pressure relief structure of a pressure-maintaining valve for a cleaning machine according to claim 1, characterized in that: A small pressure ring (7) is arranged in the cavity of the pressure-maintaining shell (1), and the pressure-maintaining valve stem (5) is inserted into the interior of the small pressure ring (7) and extends downward.

4. A pressure relief structure of a pressure-maintaining valve for a cleaning machine according to claim 1, characterized in that: A small sealing ring (8) is installed between the inner bottom wall of the pressure retaining shell (1) and the small pressure ring (7).

5. A pressure relief structure of a pressure-maintaining valve for a cleaning machine according to claim 1, characterized in that: The outer wall of the pressure retaining shell (1) is provided with a slot, and a large sealing ring (9) is installed in the slot.

6. A pressure relief structure of a pressure-maintaining valve for a cleaning machine according to claim 1, characterized in that: The outer sleeve of the pressure-maintaining valve stem (5) is provided with a pressure-maintaining spring (6), the top end of the pressure-maintaining spring (6) is connected to the bottom of the pressure-maintaining valve cover (10), and the bottom of the pressure-maintaining spring (6) is connected to the upper part of the small pressure ring (7).

7. A pressure relief structure of a pressure-maintaining valve for a cleaning machine according to claim 1, characterized in that: A flow discharge hole (15) is provided on the surface of the lower half of the pressure-maintaining valve stem (5), and a pressure discharge hole (14) communicating with the cavity of the pressure-maintaining shell (1) is provided on the outer wall of the pressure-maintaining shell (1).

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