CN218670797U

CN218670797U - Relief valve equipment of engineering machinery hydraulic system

Info

Publication number: CN218670797U
Application number: CN202222935099.7U
Authority: CN
Inventors: 王玉庭; 王永玲; 袁洪凯
Original assignee: Dalian Puman Transmission Equipment Co ltd
Current assignee: Dalian Puman Transmission Equipment Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-03-21
Anticipated expiration: 2032-11-04

Abstract

The utility model relates to a relief valve technical field, and an engineering machine tool hydraulic system's relief valve equipment is disclosed, which comprises a valve body, connector and pressure release mouth, the activity chamber has been seted up to the rear end face of valve body, activity intracavity movable mounting has the case, the rear end face of connector is provided with first faying face, the second faying face has been put to the preceding terminal surface of case, first faying face and second faying face are the inclined plane of laminating each other, the spacing groove has been seted up on the second faying face, the spacing groove is the ring channel that the cross section is the rectangle, be provided with sealed the pad on the second faying face, the position fixed mounting that the inside wall of sealed pad corresponds the spacing groove has the anticreep ring, anticreep ring and spacing groove interference fit. The utility model discloses in, can alleviate the wearing and tearing to the outer wall of second faying face when the continuous opening and shutting of second faying face, reduce the production of pockmark, simultaneously under the cooperation of spacing groove and anticreep ring, sealed outward appearance that the pad is difficult for breaking away from the second faying face is also very convenient when the replacement is sealed.

Description

Relief valve equipment of engineering machinery hydraulic system

Technical Field

The utility model relates to a relief valve technical field especially relates to an engineering machine tool hydraulic system's relief valve equipment.

Background

The pressure relief valve is a device capable of automatically opening and closing according to the working pressure of the system, and is generally installed on equipment or a pipeline of a closed system to protect the safety of the system.

Chinese patent publication No. CN215371143U discloses a pressure relief valve device through retrieval, which comprises a housing, a valve core, a valve cover, and an elastic member, wherein the inner side of the housing is provided with a first channel for gas or liquid medium to flow through and a second channel different from the first channel in extension direction, the valve core is located in the second channel and moves along the axial direction of the second channel, the tail of the valve core is connected with the valve cover located on one side of the housing through the elastic member, the end of the valve core is used for matching with the inner walls of the first channel and the second channel transition to close a medium inlet located on the first channel, an annular protrusion is arranged at the end of the valve core, and an annular groove matched with the annular protrusion is arranged at the inner wall of the second channel transition. Compared with the prior art, the device has stable structure and good sealing effect.

The head of the valve core is easy to generate pitting abrasion in the long-term use process, so that the pressure relief function is weakened or even fails, and the service life is short.

Therefore, the pressure relief valve device of the hydraulic system of the engineering machinery is provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that above-mentioned prior art exists, provide an engineering machine tool hydraulic system's relief valve equipment.

In order to achieve the purpose, the utility model discloses a following technical scheme, an engineering machine tool hydraulic system's relief valve equipment, including the valve body that is "T" font, set up the connector of terminal surface before the valve body and set up at valve body top face and the communicating pressure release mouth of connector, the rear end face of valve body set up with connector and the communicating activity chamber of pressure release mouth, activity intracavity movable mounting has the case that can slide around the activity intracavity, the diameter of connector is the zero quintuple of activity chamber diameter, and the position that the rear end face of connector is close to the case is provided with first faying face, and the position that the preceding terminal surface of case is close to first faying face is provided with the second faying face, first faying face and second faying face are the inclined plane of laminating each other, the spacing groove has been seted up on the second faying face, the spacing groove is the ring channel that the cross section is the rectangle, be provided with sealed the pad on the second faying face, the position fixed mounting that the inside wall of sealed pad corresponds the spacing groove has the anticreep ring, anticreep ring and spacing groove interference fit.

Preferably, the sealing gasket is made of rubber, the sealing gasket is of a hollow truncated cone-shaped structure, and the inner side wall of the sealing gasket is tightly attached to the second joint surface.

Preferably, the rear end face of the valve body is fixedly provided with a rear cover in a detachable mode, the front end face of the rear cover is fixedly provided with a limiting sleeve, the limiting sleeve is tightly attached to the movable cavity, a sealing ring is arranged between the front end face of the limiting sleeve and the inner wall of the valve body, and the limiting sleeve is in interference fit with the sealing ring.

Preferably, the sealing ring is a rubber ring and movably sleeved on the outer wall surface of the valve core, and the valve core can slide back and forth in the sealing ring.

Preferably, the rear cover is connected with an adjusting screw rod in a threaded manner, the front end face of the adjusting screw rod penetrates through the rear cover and extends into the movable cavity, a spring base is fixedly mounted on the front end face of the adjusting screw rod, an adjusting spring is fixedly mounted on the front end face of the spring base, and the front end of the adjusting spring is fixedly connected with the rear end of the valve core.

Preferably, the adjusting screw rod is in threaded connection with a locknut at a position outside the corresponding movable cavity.

Advantageous effects

The utility model provides an engineering machine tool hydraulic system's relief valve equipment. The method has the following beneficial effects:

(1) According to the pressure relief valve equipment of the engineering machinery hydraulic system, the sealing gasket is arranged between the first combination surface and the second combination surface, so that the abrasion to the outer wall surface of the second combination surface can be reduced when the second combination surface is continuously opened and closed, the generation of pits is reduced, meanwhile, the sealing gasket is not easy to separate from the appearance of the second combination surface under the matching of the limiting groove and the anti-slip ring, and the pressure relief valve equipment is very convenient to replace the sealing gasket.

(2) This engineering machine tool hydraulic system's relief valve equipment through adjusting the accommodate the lead screw, makes the position of spring base in the activity intracavity change to change accommodate the spring's elasticity, thereby changed relief valve pressure release threshold value size at any time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment still falls within the range which can be covered by the technical content disclosed by the present invention without affecting the function and the achievable purpose of the present invention.

FIG. 1 is a schematic view of the three-dimensional structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the structure of the head of the valve core of the present invention;

fig. 4 is a sectional view of the internal structure of the present invention.

Illustration of the drawings:

1. a valve body; 2. a connecting port; 3. a pressure relief port; 4. a movable cavity; 5. a valve core; 6. a first bonding surface; 7. a second bonding surface; 8. a limiting groove; 9. a gasket; 10. a slip-ring prevention; 11. a rear cover; 12. a limiting sleeve; 13. a seal ring; 14. adjusting the screw rod; 15. a spring mount; 16. adjusting the spring; 17. a locknut.

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 efforts all belong to the protection scope of the present invention.

Example (b): a pressure release valve device of a hydraulic system of engineering machinery comprises a T-shaped valve body 1, a connecting port 2 arranged on the front end face of the valve body 1 and a pressure release port 3 arranged on the top end face of the valve body 1 and communicated with the connecting port 2, wherein the rear end face of the valve body 1 is provided with a movable cavity 4 communicated with the connecting port 2 and the pressure release port 3, a valve core 5 capable of sliding back and forth in the movable cavity 4 is movably arranged in the movable cavity 4, the diameter of the connecting port 2 is five times of the zero point of the diameter of the movable cavity 4, a first combining surface 6 is arranged at the position, close to the valve core 5, of the rear end face of the connecting port 2, a second combining surface 7 is arranged at the position, close to the first combining surface 6, of the front end face of the valve core 5, and the first combining surface 6 and the second combining surface 7 are mutually attached inclined planes, the second combination surface 7 is provided with a limiting groove 8, the limiting groove 8 is an annular groove with a rectangular cross section, the second combination surface 7 is provided with a sealing gasket 9, the position, corresponding to the limiting groove 8, of the inner side wall of the sealing gasket 9 is fixedly provided with an anti-falling ring 10, the anti-falling ring 10 is in interference fit with the limiting groove 8, the sealing gasket 9 is arranged between the first combination surface 6 and the second combination surface 7, the abrasion to the outer wall surface of the second combination surface 7 can be reduced when the second combination surface 7 is continuously opened and closed, the generation of pits is reduced, meanwhile, under the matching of the limiting groove 8 and the anti-falling ring 10, the sealing gasket 9 is not easy to fall off the outer surface of the second combination surface 7, and the replacement of the sealing gasket 9 is very convenient.

The sealing gasket 9 is made of rubber, the sealing gasket 9 is of a hollow truncated cone-shaped structure, and the inner side wall of the sealing gasket 9 is tightly attached to the second joint surface 7.

The rear end face of valve body 1 has back lid 11 with detachable mode fixed mounting, the preceding terminal surface fixed mounting of back lid 11 has stop collar 12, stop collar 12 hugs closely with activity chamber 4, be provided with sealing washer 13 between the preceding terminal surface of stop collar 12 and the inner wall of valve body 1, and stop collar 12 and sealing washer 13 interference fit.

The sealing ring 13 is a rubber ring, the sealing ring 13 is movably sleeved on the outer wall surface of the valve core 5, the valve core 5 can slide back and forth in the sealing ring 13, and when the rear cover 11 is screwed down to enable the limiting sleeve 12 to be in interference fit with the sealing ring 13, the sealing ring 13 deforms to enable the sealing ring 13 to be tightly attached to the valve core 5, so that the sealing performance between the valve core 5 and the sealing ring 13 is improved.

Rear cover 11 female connection has accommodate the lead screw 14, accommodate the lead screw 14 preceding terminal surface runs through rear cover 11 and extends to activity chamber 4 in, accommodate the lead screw 14 preceding terminal surface fixed mounting has spring base 15, spring base 15 is the circular slab, spring base 15 preceding terminal surface fixed mounting has adjusting spring 16, adjusting spring 16's front end and case 5's rear end fixed connection, through accommodate the lead screw 14, make spring base 15 change in the position in activity chamber 4, thereby change adjusting spring 16's elasticity, thereby changed relief valve pressure release threshold size at any time.

The adjusting screw rod 14 is in threaded connection with a locknut 17 corresponding to the position outside the movable cavity 4, the adjusting screw rod 14 can be locked through the locknut 17, and looseness of the adjusting screw rod 14 in use is avoided.

The utility model discloses a theory of operation: by arranging the sealing gasket 9 between the first combining surface 6 and the second combining surface 7, the abrasion to the outer wall surface of the second combining surface 7 can be reduced when the second combining surface 7 is continuously opened and closed, the generation of pits can be reduced, meanwhile, under the matching of the limiting groove 8 and the anti-falling ring 10, the sealing gasket 9 is not easy to be separated from the appearance of the second combining surface 7, and the sealing gasket 9 is very convenient to replace.

Through adjusting the adjusting screw rod 14, the position of the spring base 15 in the movable cavity 4 is changed, so that the tightness of the adjusting spring 16 is changed, and the pressure relief threshold of the pressure relief valve is changed at any time.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an engineering machine tool hydraulic system's relief valve equipment, includes valve body (1) that is "T" font, sets up connector (2) at valve body (1) preceding terminal surface and sets up in valve body (1) top end face and the communicating pressure release mouth (3) of connector (2), its characterized in that: the anti-dropping valve is characterized in that a movable cavity (4) communicated with a connecting port (2) and a pressure relief port (3) is formed in the rear end face of the valve body (1), a valve core (5) capable of sliding back and forth in the movable cavity (4) is movably mounted in the movable cavity (4), the diameter of the connecting port (2) is five times the diameter of the movable cavity (4), a first combining surface (6) is arranged at a position, close to the valve core (5), of the rear end face of the connecting port (2), a second combining surface (7) is arranged at a position, close to the first combining surface (6), of the front end face of the valve core (5), the first combining surface (6) and the second combining surface (7) are inclined planes mutually attached, a limiting groove (8) is formed in the second combining surface (7), a sealing gasket (9) is arranged on the second combining surface (7), a dropping-preventing ring (10) is fixedly mounted at a position, corresponding to the limiting groove (8), of the inner side wall of the sealing gasket (9), and the dropping-preventing ring (10) is in interference fit with the dropping-preventing groove (8).

2. The relief valve apparatus of a hydraulic system of construction machinery according to claim 1, characterized in that: the sealing gasket (9) is made of rubber, the sealing gasket (9) is of a hollow truncated cone-shaped structure, and the inner side wall of the sealing gasket (9) is tightly attached to the second joint surface (7).

3. The relief valve apparatus of a hydraulic system of construction machinery according to claim 1, characterized in that: the rear end face of valve body (1) has back lid (11) with detachable mode fixed mounting, the preceding terminal surface fixed mounting of back lid (11) has stop collar (12), stop collar (12) are hugged closely with activity chamber (4), be provided with between the preceding terminal surface of stop collar (12) and the inner wall of valve body (1) sealing washer (13), stop collar (12) and sealing washer (13) interference fit.

4. A relief valve apparatus of a hydraulic system of construction machinery according to claim 3, characterized in that: the sealing ring (13) is a rubber ring, the sealing ring (13) is movably sleeved on the outer wall surface of the valve core (5), and the valve core (5) can slide back and forth in the sealing ring (13).

5. A relief valve apparatus of a hydraulic system of construction machinery according to claim 3, characterized in that: rear cover (11) threaded connection has accommodate the lead screw (14), the preceding terminal surface of accommodate the lead screw (14) runs through rear cover (11) and extends to in activity chamber (4), and the preceding terminal surface fixed mounting of accommodate the lead screw (14) has spring base (15), and the preceding terminal surface fixed mounting of spring base (15) has adjusting spring (16), and the front end of adjusting spring (16) and the rear end fixed connection of case (5).

6. The relief valve apparatus of a hydraulic system of a construction machine according to claim 5, characterized in that: the adjusting screw rod (14) is in threaded connection with a locknut (17) corresponding to the position outside the movable cavity (4).