CN211693665U

CN211693665U - Overflow valve

Info

Publication number: CN211693665U
Application number: CN202020149148.2U
Authority: CN
Inventors: 杨庆余; 官锡交; 王敏科
Original assignee: Shenzhen Huatian Shengshi Technology Co ltd
Current assignee: Shenzhen Huatian Shengshi Technology Co ltd
Priority date: 2020-02-02
Filing date: 2020-02-02
Publication date: 2020-10-16
Anticipated expiration: 2030-02-02

Abstract

The utility model discloses an overflow valve, including valve body, pressure release chamber and main valve core, the valve body is provided with oil inlet and oil-out respectively, and the inside main valve chamber of having seted up of valve body, and valve body top sealing connection has the valve gap, and the inside pressure release chamber of seting up of valve gap, main valve seat is installed to main valve intracavity side, main valve core is connected with reset spring through the valve rod, and the valve rod top is provided with the round hole, install the closing cap in the round hole, and be fixed with the bellying on the valve body directly over the closing cap, be provided with the guide valve core in the pressure release chamber, the guide valve core passes through pressure regulating spring and spring seat linkage together, the spring seat is fixed at the plug screw front end, and the plug. The overflow valve is reasonable in structure setting, the hollow valve rod is arranged between the main valve core and the reset spring, the tension borne by the reset spring is reduced, the protruding piece and the sealing cover are arranged, when the reset spring fails, liquid can enter the valve rod from the round hole, the gravity of the valve rod is increased, and the overflow valve is prevented from completely failing.

Description

Overflow valve

Technical Field

The utility model relates to a valve gear science and technology technical field specifically is an overflow valve.

Background

The valve is in the fluid system, the apparatus used for controlling direction, pressure, flow of fluid is to make the medium liquid, gas, powder in piping and apparatus flow or stop and can control its apparatus of flow, the relief valve is a kind of hydraulic pressure control valve, mainly play the overflow of constant pressure, steady voltage, and safety protection in the hydraulic apparatus, when the system pressure increases, the relief valve opens, make the surplus flow spill back to the oil tank, guarantee the inlet pressure of the relief valve is invariable, the valve core in the valve body of most relief valves connects with spring directly at present, the spring not merely bears the weight of valve core for a long time, when the relief valve works, the frequent opening and closing of the valve core makes the spring stretch out and draw back constantly, the reliability of use of the spring is reduced, and after the spring is damaged and lost, the relief valve will lose efficacy, unable to use.

In order to overcome the defects in the existing market, the technology of the overflow valve device is urgently needed to be improved, the safe operation of the overflow valve can be better ensured, and the development of the valve industry is promoted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an overflow valve to solve the slip voussoir and the safety gear direct contact who proposes in the above-mentioned background art, therefore use back voussoir wearing and tearing comparatively seriously for a long time, if not change fixed voussoir and slip voussoir, can influence the normal use scheduling problem of safety gear.

In order to achieve the above object, the utility model provides a following technical scheme: an overflow valve comprises a valve body, a pressure relief cavity and a main valve core, wherein the valve body is respectively provided with an oil inlet and an oil outlet, the main valve cavity is arranged in the valve body, a valve cover is hermetically connected above the valve body, a pressure relief cavity is arranged in the valve cover, a main valve seat is arranged on the inner side of the main valve cavity, a main valve core can be arranged between the main valve seats, the main valve core is connected with a return spring through a valve rod, the top of the valve rod is provided with a round hole, a sealing cover is arranged in the round hole, a convex part is fixed on the valve body right above the sealing cover, a guide valve core is arranged in the pressure relief cavity and is connected with a spring seat through a pressure regulating spring, the spring seat is fixed at the front end of the screw plug, and the screw plug is sleeved with a nut, the rear end of the screw plug is connected with the motor through a connecting shaft, the oil inlet and the oil outlet are respectively communicated with the first damping hole and the oil drainage hole, and the first damping hole is communicated with the second damping hole.

Preferably, the valve body and the valve cover are installed together, a second damping hole, a first damping hole and an oil drainage hole are jointly formed between the valve body and the valve cover, a protruding piece is installed on the valve body under the second damping hole, a main valve cavity is formed inside the valve body, a reset spring is installed at the top of the main valve cavity, and a main valve seat is installed on the inner side of the bottom of the main valve cavity.

Preferably, the other end of the reset spring is fixed at the top of the valve rod, the bottom of the valve rod is connected with the main valve core, a round hole is formed in the center of the top surface of the valve rod, a sealing cover is plugged in the round hole, the cross section of the valve rod is T-shaped, and the valve rod is of a hollow structure.

Preferably, the seal cover, the protruding piece and the second damping hole are located on the same vertical line, the seal cover is located at the lowermost part, the second damping hole is located at the uppermost part, and the protruding piece is located between the seal cover and the second damping hole.

Preferably, the pressure regulating spring is horizontally and transversely placed, the left end and the right end of the pressure regulating spring are respectively fixed on the guide valve core and the spring seat, and the guide valve core is conical.

Preferably, the screw plug is installed at the valve gap right-hand member in the spiro union, and the screw plug left end is together fixed with the spring holder, and the connecting axle is installed to the screw plug right-hand member, and the connecting axle right-hand member is provided with the motor.

Preferably, the oil outlet is communicated with the pressure relief cavity through an oil drainage hole, and the oil outlet is communicated with the main valve cavity.

Compared with the prior art, the beneficial effects of the utility model are that: this overflow valve, the structure sets up rationally, set up hollow valve rod between main valve core and reset spring, alleviate the pulling force that reset spring receives, set up the closing cap at bellying and valve rod top, when making reset spring inefficacy, inside liquid accessible round hole gets into the valve rod, increase valve rod gravity, avoid the overflow valve complete failure, installation motor and connecting axle, make things convenient for the remote control overflow valve, avoid the workman to work in dangerous occasion, ensure staff personal safety, the safe operation of assurance overflow valve that can be better, promote the development of valve trade.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a front view showing the failure of the structural return spring of the present invention;

fig. 3 is a schematic view of the structural valve rod of the present invention from above.

In the figure: 1. a valve body; 2. a valve cover; 3. a motor; 4. a connecting shaft; 5. a nut; 6. a plug screw; 7. a spring seat; 8. a pressure regulating spring; 9. a pressure relief cavity; 10. a pilot valve core; 11. a second orifice; 12. a boss member; 13. a first orifice; 14. an oil inlet; 15. a main valve chamber; 16. a main valve element; 17. a main valve seat; 18. an oil outlet; 19. a valve stem; 20. a return spring; 21. sealing the cover; 22. a circular hole; 23. and an oil drainage hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an overflow valve comprises a valve body 1, a pressure relief cavity 9 and a main valve core 16, wherein the valve body 1 is respectively provided with an oil inlet 14 and an oil outlet 18, the inside of the valve body 1 is provided with a main valve cavity 15, the upper part of the valve body 1 is hermetically connected with a valve cover 2, the inside of the valve cover 2 is provided with the pressure relief cavity 9, the valve body 1 and the valve cover 2 are installed together, a second damping hole 11, a first damping hole 13 and an oil drainage hole 23 are jointly formed between the valve body 1 and the valve cover 2, a bulge piece 12 is installed on the valve body 1 right below the second damping hole 11, the inside of the valve body 1 is provided with the main valve cavity 15, the top of the main valve cavity 15 is provided with a return spring 20, the inner side of the bottom of the main valve cavity 15 is provided with a main valve seat 17, the main valve core 16 can be placed between the main valve seats 17, the main valve core 16, and the valve body 1 right above the sealing cover 21 is fixed with a convex part 12, the other end of the return spring 20 is fixed on the top of the valve rod 19, the bottom of the valve rod 19 is connected with the main valve core 16, the center of the top surface of the valve rod 19 is provided with a round hole 22, the sealing cover 21 is blocked in the round hole 22, the cross section of the valve rod 19 is in a T shape, the valve rod 19 is in a hollow structure, the structure is reasonable, the hollow valve rod 19 is arranged between the main valve core 16 and the return spring 20 to reduce the pulling force applied on the return spring 20, the sealing cover 21, the convex part 12 and the second damping hole 11 are positioned on the same vertical line, the sealing cover 21 is positioned at the lowest part, the second damping hole 11 is positioned at the highest part, the convex part 12 is positioned between the sealing cover 21 and the second damping hole 11, the sealing cover 12 and the sealing cover 21 on the top of the valve rod 19 are arranged, when the return spring 20 fails, the overflow valve is prevented from being completely failed, a guide valve core 10 is arranged in a pressure relief cavity 9, the guide valve core 10 is connected with a spring seat 7 through a pressure regulating spring 8, the pressure regulating spring 8 is horizontally and transversely arranged, the left end and the right end of the pressure regulating spring 8 are respectively fixed on the guide valve core 10 and the spring seat 7, the guide valve core 10 is in a conical shape, the spring seat 7 is fixed at the front end of a screw plug 6, a nut 5 is sleeved on the screw plug 6, the rear end of the screw plug 6 is connected with a motor 3 through a connecting shaft 4, the screw plug 6 is in threaded connection with the right end of a valve cover 2, the left end of the screw plug 6 is fixed with the spring seat 7, the right end of the screw plug 6 is provided with the connecting shaft 4, the right end of the connecting shaft 4 is provided with the motor 3, the motor 3 is Y80M2-4 in type, an oil inlet 14 and an oil outlet 18 are respectively communicated with a first damping hole 13, the oil outlet 18 is communicated with the main valve cavity 15, the motor 3 and the connecting shaft 4 are installed, the overflow valve can be conveniently and remotely controlled, workers are prevented from working in dangerous occasions, personal safety of workers is guaranteed, safety operation of the overflow valve can be better guaranteed, and development of the valve industry is promoted.

The working principle is as follows: when the overflow valve is used, the pilot valve is responsible for pressure regulation, the main valve is responsible for overflow, hydraulic oil enters from the oil inlet 14, acts on the pilot valve core 10 after passing through the first damping hole 13, flows into the upper end of the main valve cavity 15 through the second damping hole 11, and simultaneously enters the bottom end of the main valve cavity 15, when the pressure of the oil inlet 14 is low and the hydraulic acting force on the pilot valve core 10 is not enough to overcome the acting force of the pressure regulating spring 8, the pilot valve core 10 is closed, so that the pressures of the upper end and the lower end of the main valve core 16 are equal, under the action of the return spring 20, the main valve core 16 is positioned at the lowest end position, the oil inlet 14 and; when the pressure of the oil inlet 14 is high and the hydraulic pressure on the guide valve core 10 is larger than the preset force of the pressure regulating spring 8, the guide valve core 10 is opened, the hydraulic oil flows back to the oil tank through the pressure relief cavity 9, the oil drain hole 23 and the oil outlet 18 through the first damping hole 13, the pressure at the upper end of the main valve core 16 is smaller than that at the lower end due to the action of the first damping hole 13, pressure difference occurs between the two, when the force of the pressure difference acting on the main valve core 16 exceeds the force of the reset spring 20, the main valve core 16 is opened, the oil flows in from the oil inlet 14 and flows back to the oil tank through the oil outlet 18 to realize the overflow effect, the connection 4 and the screw plug 6 are driven by the rotation of the motor 3, the pretightening force of the pressure regulating spring 8 can be regulated, the overflow pressure of the overflow valve can be regulated, the second damping hole 11 can eliminate the vibration of the main valve core 16, the balance of the valve, oil enters the valve rod 19 through the convex part 12, the gravity of the valve rod 19 is increased, so that the main valve element 16 is reset downwards, and the complete failure of the overflow valve is avoided, which is the whole working process of the overflow valve.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An overflow valve, includes valve body (1), pressure relief chamber (9) and main valve core (16), its characterized in that: the valve body (1) is provided with an oil inlet (14) and an oil outlet (18) respectively, a main valve cavity (15) is formed inside the valve body (1), a valve cover (2) is connected above the valve body (1) in a sealing manner, a pressure relief cavity (9) is formed inside the valve cover (2), a main valve seat (17) is installed on the inner side of the main valve cavity (15), a main valve core (16) can be placed between the main valve seats (17), the main valve core (16) is connected with a reset spring (20) through a valve rod (19), a round hole (22) is formed in the top of the valve rod (19), a sealing cover (21) is installed in the round hole (22), a protruding piece (12) is fixed on the valve body (1) right above the sealing cover (21), a guide valve core (10) is arranged in the pressure relief cavity (9), the guide valve core (10) is connected with a spring seat (7) through a pressure regulating spring (8), and the spring seat, and the screw plug (6) is sleeved with the nut (5), the rear end of the screw plug (6) is connected with the motor (3) through the connecting shaft (4), the oil inlet (14) and the oil outlet (18) are respectively communicated with the first damping hole (13) and the oil drainage hole (23), and the first damping hole (13) is communicated with the second damping hole (11).

2. A relief valve according to claim 1, characterized in that: the valve body (1) and the valve cover (2) are installed together, a second damping hole (11), a first damping hole (13) and an oil drainage hole (23) are jointly formed between the valve body (1) and the valve cover (2), a protruding part (12) is installed on the valve body (1) under the second damping hole (11), a reset spring (20) is installed at the top of a main valve cavity (15), and a main valve seat (17) is installed on the inner side of the bottom of the main valve cavity (15).

3. A relief valve according to claim 1, characterized in that: the other end of the reset spring (20) is fixed at the top of the valve rod (19), the bottom of the valve rod (19) is connected with the main valve core (16), a round hole (22) is formed in the center of the top surface of the valve rod (19), a sealing cover (21) is plugged in the round hole (22), the cross section of the valve rod (19) is T-shaped, and the valve rod (19) is of a hollow structure.

4. A relief valve according to claim 1, characterized in that: the sealing cover (21), the protruding piece (12) and the second damping hole (11) are located on the same vertical line, the sealing cover (21) is located at the lowest part, the second damping hole (11) is located at the uppermost part, and the protruding piece (12) is located between the sealing cover (21) and the second damping hole (11).

5. A relief valve according to claim 1, characterized in that: the pressure regulating spring (8) is horizontally and transversely placed, the left end and the right end of the pressure regulating spring (8) are respectively fixed on the guide valve core (10) and the spring seat (7), and the guide valve core (10) is conical.

6. A relief valve according to claim 1, characterized in that: the screw plug (6) is installed at the right end of the valve cover (2) in a threaded mode, the left end of the screw plug (6) is fixed with the spring seat (7), the connecting shaft (4) is installed at the right end of the screw plug (6), and the motor (3) is arranged at the right end of the connecting shaft (4).

7. A relief valve according to claim 1, characterized in that: the oil outlet (18) can be communicated with the pressure relief cavity (9) through an oil drainage hole (23), and the oil outlet (18) is communicated with the main valve cavity (15).