CN217401988U - Leakage-free pilot safety overflow valve - Google Patents

Abstract

The utility model discloses a non-leakage guide type safety overflow valve, which comprises a guide type overflow valve body, wherein the left side surface and the right side surface of the guide type overflow valve body are respectively provided with an oil inlet pipe and an oil return pipe, the oil inlet pipe and the oil return pipe realize the circulation of hydraulic oil, the surface of the oil inlet pipe is sleeved with a sleeve pipe, a limiting rod is arranged in an inclined way, can restrict oil pipe and drop from advancing oil pipe, realize the function of automatic locking, the gag lever post is close to the one end rotation that advances oil pipe and is connected with the connecting rod, connecting rod tip fixedly connected with clamp plate, the clamp plate tightly presses oil pipe advancing oil pipe surface, improve oil pipe and advance the fastness and the leakproofness that oil pipe is connected, the screw thread of sleeve pipe surface spiro union has the screw ring, the screw ring supports on the gag lever post surface, it rotates to screw up the screw ring restriction gag lever post, avoid hydraulic oil to leak, two sets of sealed wearing property and the sealing performance that improves the case that fills up, prevent the inside leakage of hydraulic oil.

Description

Leakage-free pilot safety overflow valve

Technical Field

The utility model relates to a hydrovalve technical field specifically is a no leak guide formula safety overflow valve.

Background

The existing pilot operated overflow valve is mostly sleeved with an external oil pipe, then the hoop is used for tightening the oil pipe, the oil pressure at the joint of an oil inlet and the oil pipe is large, when the pilot operated overflow valve works, a small amount of hydraulic oil can be leaked due to large oil pressure and abrasion of the oil pipe, the sealing performance is poor, the hydraulic pressure is damaged, and the valve core inside the pilot operated overflow valve can lead to the leakage of the hydraulic oil inside the pilot operated overflow valve due to abrasion, so that the pilot operated overflow valve cannot work, and the function of adjusting the overflow pressure is lost.

Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a non-leakage pilot-operated safety relief valve is provided, so as to achieve the purpose of higher practical value.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a no leakage guide's formula safety overflow valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a non-leakage pilot-operated safety overflow valve comprises a pilot-operated overflow valve body, wherein the left side surface and the right side surface of the pilot-operated overflow valve body are respectively provided with an oil inlet pipe and an oil return pipe, and the oil return pipe is positioned on the right side of a valve core, so that hydraulic oil can rapidly flow into the oil return pipe;

the sleeve pipe has been cup jointed on the inlet tube surface, the sleeve pipe surface is equipped with four group's bar holes, and four group's bar holes are circular align to grid, and the downthehole portion of bar rotates and is connected with the gag lever post, and the gag lever post extends away from the bar downthehole extension, the one end that the gag lever post is close to the inlet tube rotates and is connected with the connecting rod, connecting rod tip fixedly connected with clamp plate, sleeve pipe surface spiro union has the screw thread ring, the screw thread ring supports on the gag lever post surface, the clamp plate is the arc setting, the radian of clamp plate and external oil pipe's diameter phase-match, the screw thread ring surface is equipped with the non-slip raised, non-slip raised and screw thread ring integrated into one piece.

Furthermore, a sealing ring is arranged below the interior of the pilot overflow valve body and fixedly connected with the pilot overflow valve body, a valve core is connected to the inner wall of the pilot overflow valve body in a sliding manner, two groups of annular grooves are formed in the side faces of the valve core, a sealing gasket is arranged in each annular groove and abuts against the inner wall of the pilot overflow valve body;

the surface of the valve core is sleeved with a sealing ring which abuts against the surface of the sealing ring, the sealing ring is fixedly connected with the valve core, a damping hole and a first oil hole are formed in the valve core, the lower part of the valve core is inserted into the sealing ring, the damping hole is communicated with a cavity below the sealing ring, and the first oil hole penetrates through the valve core;

the pilot operated overflow valve comprises a pilot operated overflow valve body, and is characterized in that a second oil hole and an oil return hole are formed in the upper portion inside the pilot operated overflow valve body, the second oil hole is communicated with a cavity on the right side of a conical hole plate, a first spring is arranged on the upper side of a valve core, the conical hole plate is arranged on the upper portion inside the pilot operated overflow valve body, a conical valve is arranged on the left side face of the conical hole plate and is in sliding connection with the pilot operated overflow valve body, an adjusting rod is screwed on the left side face of the pilot operated overflow valve body, a second spring is arranged between the adjusting rod and the conical valve, and the adjusting rod is in sliding connection with the pilot operated overflow valve body.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an advance oil pipe and be connected with external oil pipe, the clamp plate tightly presses oil pipe advancing oil pipe surface, improve oil pipe and advance the fastness and the leakproofness that oil pipe is connected, the gag lever post is the slope setting, can restrict oil pipe and drop from advancing oil pipe, realize the function of automatic locking, it restricts the gag lever post rotation to screw up the screw ring, reinforce oil pipe and advance the stability that oil pipe is connected, avoid hydraulic oil to leak, improve the precision that guide's formula overflow valve body opened and close pressure, two sets of sealing washers improve the wear resistance and the sealing performance of case, prevent the inside leakage of hydraulic oil, can adjust overflow pressure.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1;

fig. 3 is a schematic structural view of the connection between the sleeve and the pressing plate of the present invention.

In the figure: 1. a pilot operated relief valve body; 2. an oil return pipe; 3. an oil inlet pipe; 4. a sleeve; 5. a limiting rod; 6. a connecting rod; 7. pressing a plate; 8. a threaded ring; 9. a valve core; 10. a first oil hole; 11. a gasket; 12. a damping hole; 13. a seal ring; 14. a seal ring; 15. a first spring; 16. a second oil hole; 17. an oil return hole; 18. a conical hole plate; 19. a cone valve; 20. a second spring; 21. and adjusting the rod.

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: a non-leakage pilot operated safety overflow valve comprises a pilot operated overflow valve body 1, wherein a sealing ring 13 is arranged below the inside of the pilot operated overflow valve body 1, and the inner space of the pilot operated overflow valve body 1 is matched with the sealing ring 13 to form a small cavity;

the inner wall of the pilot operated overflow valve body 1 is connected with a valve core 9 in a sliding mode, when the valve core 9 moves upwards, hydraulic oil smoothly flows into the oil return pipe 2, two groups of annular grooves are formed in the side faces of the valve core 9, sealing gaskets 11 are arranged inside the annular grooves, the firmness of connection between the sealing gaskets 11 and the valve core 9 is improved through the annular grooves, and the valve core 9 is prevented from being abraded by the sealing gaskets 11;

the surface of the valve core 9 is sleeved with a sealing ring 14 which is abutted against the surface of a sealing ring 13, the sealing ring 14 prevents hydraulic oil from directly flowing to the lower part of the sealing ring 13, the lower part of the valve core 9 is inserted into the sealing ring 13, and the damping hole 12 is communicated with a cavity below the sealing ring 13, so that the hydraulic oil smoothly flows to the lower part of the sealing ring 13;

a damping hole 12 and a first oil hole 10 are formed in the valve core 9, a second oil hole 16 and an oil return hole 17 are formed in the upper portion of the interior of the pilot-operated overflow valve body 1, and the second oil hole 16 is communicated with a cavity on the right side of the conical orifice plate 18, so that hydraulic oil can smoothly flow into the cavity where the conical orifice plate 18 is located;

a first spring 15 is arranged on the valve core 9, the elastic force of the first spring 15 ensures that a sealing ring 14 is abutted against the surface of a sealing ring 13, a conical orifice plate 18 is arranged above the inner part of the pilot overflow valve body 1, a conical valve 19 is arranged on the left side surface of the conical orifice plate 18, an adjusting rod 21 is screwed on the left side surface of the pilot overflow valve body 1, a second spring 20 is arranged between the adjusting rod 21 and the conical valve 19, the elastic force of the second spring 20 pushes the conical valve 19 to be inserted into the conical orifice plate 18,

the left side surface and the right side surface of the pilot overflow valve body 1 are respectively provided with an oil inlet pipe 3 and an oil return pipe 2, hydraulic oil enters the pilot overflow valve body 1 through the oil inlet pipe 3 and is discharged from the pilot overflow valve body 1 through the oil return pipe 2;

the sleeve pipe 4 has been cup jointed on 3 surfaces of inlet tube, and sleeve pipe 4 supports four group's gag lever post 5, 4 surfaces of sleeve pipe are equipped with four group's bar holes, and the downthehole portion of bar rotates and is connected with gag lever post 5, and gag lever post 5 extends away from the bar downthehole extension, and the bar hole makes gag lever post 5 rotate smoothly, and gag lever post 5 is the slope setting, gag lever post 5 is close to the one end rotation of inlet tube 3 and is connected with connecting rod 6, 6 tip fixedly connected with clamp plates 7 of connecting rod, clamp plate 7 is the arc setting for clamp plate 7 is better with oil pipe laminating effect, the spiro union in 4 surfaces of sleeve pipe has screw ring 8, screw ring 8 supports on 5 surfaces of gag lever post, and screw ring 8 limits the gag lever post 5 and independently rotates, screw ring 8 surfaces are equipped with anti-skid protrusion, prevent to twist and move screw ring 8 and skid.

Specifically, when the device is used, the threaded ring 8 is unscrewed to enable the limiting rod 5 to rotate smoothly, an external oil pipe is sleeved on the surface of the oil inlet pipe 3, the limiting rod 5 is rotated at the moment, the limiting rod 5 controls the pressing plate 7 to rotate through the connecting rod 6, the pressing plate 7 is enabled to abut against the surface of the external oil pipe, the limiting rod 5 is in an inclined state at the moment, when the external oil pipe moves leftwards and falls off from the oil inlet pipe 3, the external oil pipe drives the pressing plate 7 to move, the pressing plate 7 cannot move due to the thickness of the external oil pipe and the support of the external oil pipe 3 on the external oil pipe, the self-locking function of the external oil pipe and the oil inlet pipe 3 is realized, the threaded ring 8 is screwed to abut against the surface of the limiting rod 5, the limiting rod 5 is further prevented from loosening, hydraulic oil enters between the valve core 9 and the sealing ring 13 along the oil inlet pipe 3, the first oil hole 10 and the second oil hole 16 flow to the right side of the conical hole plate 18, the conical valve 19 is pushed leftwards when the oil pressure is increased, the hydraulic oil flows into the oil return hole 17 after flowing through the conical hole plate 18, then flows to the lower part of the sealing ring 13 along the damping hole 12, when the pressure of the hydraulic oil is increased, the valve core 9 is jacked upwards, the valve core 9 does not block the oil return pipe 2 any more, the valve core 9 drives the sealing ring 14 to move upwards and does not block the sealing ring 13 any more, at the moment, the hydraulic oil flows out along the oil return pipe 2, and the function of overflowing and pressure relief is realized.

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 (6)

1. The utility model provides a no guide's formula safety overflow valve of leakage, includes guide's formula overflow valve body (1), its characterized in that: the left side face and the right side face of the pilot overflow valve body (1) are respectively provided with an oil inlet pipe (3) and an oil return pipe (2), the surface of the oil inlet pipe (3) is sleeved with a sleeve (4), four groups of strip-shaped holes are formed in the surface of the sleeve (4), a limiting rod (5) is rotatably connected inside each strip-shaped hole, the limiting rod (5) extends out of each strip-shaped hole, one end, close to the oil inlet pipe (3), of the limiting rod (5) is rotatably connected with a connecting rod (6), a pressing plate (7) is fixedly connected to the end portion of the connecting rod (6), a threaded ring (8) is screwed to the surface of the sleeve (4), and the threaded ring (8) abuts against the surface of the limiting rod (5).

2. The non-leakage pilot-operated safety relief valve according to claim 1, characterized in that: the novel pilot operated overflow valve is characterized in that a sealing ring (13) is arranged below the inside of the pilot operated overflow valve body (1), a valve core (9) is connected to the inner wall of the pilot operated overflow valve body (1) in a sliding mode, a sealing ring (14) abutting against the surface of the sealing ring (13) is sleeved on the surface of the valve core (9), a damping hole (12) and a first oil hole (10) are formed in the valve core (9), a second oil hole (16) and an oil return hole (17) are formed in the upper portion of the inside of the pilot operated overflow valve body (1), a first spring (15) is arranged on the upper side of the valve core (9), a conical hole plate (18) is arranged on the upper portion of the inside of the pilot operated overflow valve body (1), a conical valve (19) is arranged on the left side face of the conical hole plate (18), an adjusting rod (21) is connected to the left side face of the pilot operated overflow valve body (1) in a threaded mode, and a second spring (20) is arranged between the adjusting rod (21) and the conical valve (19).

3. The non-leakage pilot-operated safety relief valve according to claim 2, characterized in that: two groups of annular grooves are formed in the side face of the valve core (9), and a sealing gasket (11) is arranged in each annular groove.

4. The non-leakage pilot-operated safety relief valve according to claim 1, characterized in that: the pressing plate (7) is arranged in an arc shape, and the surface of the threaded ring (8) is provided with an anti-skid bulge.

5. The non-leakage pilot operated safety relief valve according to claim 2, characterized in that: the lower part of the valve core (9) is inserted into the sealing ring (13), and the damping hole (12) is communicated with a cavity below the sealing ring (13).

6. The non-leakage pilot-operated safety relief valve according to claim 2, characterized in that: the second oil hole (16) is communicated with a cavity on the right side of the conical hole plate (18).

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