CN217300874U

CN217300874U - Metering pump pressure release valve with exhaust function

Info

Publication number: CN217300874U
Application number: CN202221242370.2U
Authority: CN
Inventors: 许晓军
Original assignee: Wardek Fluid Equipment Dalian Co Ltd
Current assignee: Wardek Fluid Equipment Dalian Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-08-26
Anticipated expiration: 2032-05-23

Abstract

The utility model discloses a measuring pump relief valve with exhausting function relates to measuring pump relief valve technical field. Comprises a relief valve chamber, an exhaust valve mechanism and a disk spring, spring guide bar, discharge valve mechanism includes the valve rod, valve awl and valve spring, the valve rod is hollow structure, valve rod surface below is provided with the ring channel, evenly be provided with circular through-hole in the ring channel, the valve awl runs through valve rod structure, the one end of valve awl is the toper, the other end of valve awl is provided with the spring holder, the top still is provided with fastening nut, valve spring suit is on the valve awl, the valve spring sets up between the upper surface and the spring holder of valve rod, the relief valve chamber is hollow structure, the bottom is provided with the disk seat, discharge valve mechanism sets up the bottom inside the relief valve chamber, discharge valve mechanism and relief valve chamber sliding connection, spring guide bar suit is on discharge valve mechanism's top, belleville spring suit rather than sliding connection on spring guide bar, the utility model discloses occupation space is little, possesses pressure release and exhaust function simultaneously.

Description

Metering pump pressure release valve with exhaust function

Technical Field

The utility model belongs to the technical field of the measuring pump relief valve, specifically be a measuring pump relief valve with exhausting function.

Background

The metering pump belongs to a reciprocating displacement pump, has the characteristics of high metering precision and stepless regulation of flow, and is widely applied to the industries of chemical industry, environmental protection, petrifaction, thermal power and the like due to the characteristics of excellent corrosion resistance, explosion resistance and the like.

Hydraulic pressure diaphragm type measuring pump is when the operation, hydraulic oil need keep the constant volume, when hydraulic oil is excessive, pressure rise, cause the diaphragm to damage easily, lead to whole pump body to damage when serious, when hydraulic oil lacks, the oil supplementing valve can automatic oil supplementing, the relief valve opens the pressure release when pressure superpressure, can not contain gas in the hydraulic oil simultaneously, because gas is compressible, consequently when containing gas in the hydraulic oil, can cause measurement pump flow very little, influence the measurement accuracy of measuring pump, when containing gas in the hydraulic oil, can be usually through discharge valve with gaseous discharge, current discharge valve and relief valve are two parts usually, this sets up occupation space great, discharge valve and relief valve all stand out in the pump body outside simultaneously, the volume of the pump body has been increased.

Therefore, how to provide a metering pump relief valve capable of exhausting hydraulic oil while relieving pressure becomes a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a measuring pump relief valve with exhausting function, the utility model discloses can open the pressure release when measuring pump pressure superpressure to can discharge through the gas of built-in discharge valve in with hydraulic oil through adjusting screw control pressure's size, simple structure saves space more simultaneously.

In order to achieve the purpose, the utility model provides a measuring pump relief valve with exhaust function, including relief valve chamber, discharge valve mechanism, belleville spring, spring guide rod, discharge valve mechanism includes valve rod, valve awl and valve spring, the valve rod is hollow structure, and the valve rod surface below is provided with the ring channel, evenly be provided with circular through-hole in the ring channel, the valve awl runs through valve rod structure, the one end of valve awl is the toper for sealing the valve rod, the other end of valve awl is provided with the spring holder, the top of spring holder is provided with fastening nut, the valve spring suit is on the valve awl, the valve spring sets up between the upper surface of valve rod and spring holder, the relief valve chamber is hollow structure, the bottom of valve chamber is provided with the valve seat, discharge valve mechanism sets up the bottom in relief valve chamber inside, discharge valve mechanism and relief valve chamber sliding connection, the spring guide rod is sleeved at the top end of the exhaust valve mechanism, the disc spring is sleeved on the spring guide rod, and the disc spring is connected with the spring guide rod in a sliding mode.

Furthermore, a check ring is arranged between the valve seat and the relief valve chamber, an exhaust inlet is formed in the bottom end of the valve seat, and a first O-shaped ring is arranged on the outer side of the exhaust inlet.

Further, the central point of the lower extreme of valve awl puts and is provided with interior cavity, set up compression spring in the interior cavity, compression spring and interior cavity sliding connection, compression spring's bottom is supported and is leaned on there being sealed valve ball, the through-hole that transversely runs through the valve awl is seted up on the top of interior cavity.

The spring guide rod is characterized by further comprising a supporting gasket and an axial thrust disc, a stepped seat is arranged at the bottom end of the spring guide rod, the supporting gasket is sleeved between the stepped seat and the disc spring, and the axial thrust disc is arranged between the disc spring and the adjusting screw rod.

Further, still include spherical packing ring, spherical packing ring suit is on the valve rod, the bottom of ladder seat corresponds and is provided with concave groove.

Further, still include second O type circle and seal gasket, the outer wall of relief valve chamber divide into installation part and the outer part of visiting of pump in the pump, installation part's bottom is provided with annular through hole in the pump, and the top of annular through hole is provided with the external screw thread, second O type circle sets up the top at the external screw thread, seal gasket sets up in the pump between installation part and the outer part of visiting of pump.

Further, still include adjusting screw and hexagon nut, hexagon nut sets up on adjusting screw, hexagon nut and adjusting screw threaded connection, adjusting screw suit is on the spring guide bar, adjusting screw passes through vice and relief valve chamber top threaded connection of screw thread.

Further, still include the protective cover, the protective cover suit is on adjusting screw.

The utility model discloses simple structure not only can realize the function of measuring pump pressure release, but also can in time discharge the bubble that produces in the measuring pump hydraulic oil motion process by discharge valve mechanism, reduces the gas content in the hydraulic oil to improve the measurement accuracy of measuring pump.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is the schematic diagram of the relief valve chamber structure of the utility model.

Fig. 3 is a schematic view of the exhaust valve mechanism of the present invention.

Fig. 4 is a sectional view of the valve cone structure of the present invention.

Wherein, 1, relief valve chamber; 2. a valve stem; 3. a disc spring; 4. a valve seat; 5. a first O-ring; 6. a second O-ring; 7. adjusting the screw rod; 8. a hexagonal nut; 9. an axial thrust disk; 10. a support pad; 11. a spring guide rod; 12. a protective cover; 13. a spherical washer; 14. a retainer ring; 15. a valve cone; 16. a valve spring; 17. a spring seat; 18. fastening a nut; 19. sealing gaskets; 20. a compression spring; 21. and sealing the valve ball.

Detailed Description

To achieve the above objects and advantages, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "one side", "inner", "outer", "side", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Example 1

As shown in fig. 1-4, the utility model provides a measuring pump relief valve with exhausting function, including relief valve chamber 1, discharge valve mechanism, belleville spring 3, spring guide rod 11, adjusting screw 7, hexagon nut 8 and protective cover 12.

The pressure relief valve chamber 1 is of a hollow structure, annular through holes are uniformly formed below the surface of the pressure relief valve chamber 1, a valve seat 4 is arranged at the bottom end of the pressure relief valve chamber 1, a retainer ring 14 is arranged between the valve seat 4 and the pressure relief valve chamber 1 and used for sealing the bottom end of the pressure relief valve chamber 1, an exhaust inlet is arranged at the bottom end of the valve seat 4, a first O-ring 5 is arranged on the outer side of the exhaust inlet and used for ensuring that the pressure relief valve chamber 1 and a metering pump are in a sealed state, an exhaust valve mechanism is arranged at the bottom end inside the pressure relief valve chamber 1 and is in sliding connection with the pressure relief valve chamber 1, a spring guide rod 11 is sleeved at the top end of the exhaust valve mechanism, a disc spring sleeve 3 is arranged on the spring guide rod 11, a disc spring 3 is in sliding connection with the spring guide rod 11, an adjusting screw rod 7 is arranged at the upper end of the spring guide rod 11, a hexagon nut 8 is arranged on the adjusting screw rod 7, and the hexagon nut 8 is in threaded connection with the adjusting screw rod 7, the adjusting screw 7 is in threaded connection with the top end of the relief valve chamber 1 through a thread pair, the adjusting screw 7 is sleeved with a protective cover 12 which can protect the adjusting screw 7, the bottom end of the spring guide rod 11 is provided with a step seat, a supporting gasket 10 is sleeved between the step seat and the disk spring 3, an axial thrust disc 9 is arranged between the disk spring 3 and the adjusting screw 7, the supporting gasket 10 and the axial thrust disc 9 are arranged to ensure that the disk spring 3 is deformed and compressed by rotating the adjusting screw 7, so that the pressure relief strength of the relief valve is changed, the hexagonal nut 8 is arranged to lock the adjusting screw 7, when the pressure relief is carried out, hydraulic oil pushes the exhaust valve mechanism to drive the spring guide rod 11 to move upwards to compress the disk spring 3, and the hydraulic oil can enter the hydraulic oil tank through the annular through hole of the relief valve chamber 1 from the exhaust inlet, and the pressure relief of the hydraulic oil is realized.

The exhaust valve mechanism comprises a valve rod 2, a valve cone 15 and a valve spring 16, wherein the valve rod 2 is of a hollow structure, a spherical gasket 13 is sleeved on the valve rod 2, a concave groove is correspondingly formed in the bottom end of a step seat, the butt joint of the valve rod 2 and a spring guide rod 11 is convenient, an annular groove is formed below the surface of the valve rod 2, circular through holes are uniformly formed in the annular groove and communicated with the interior of the valve rod, the valve cone 15 penetrates through the structure of the valve rod 2, one end of the valve cone 15 is conical and used for sealing the valve rod 2, a spring seat 17 is arranged at the other end of the valve cone 15, a fastening nut 18 is arranged above the spring seat 17, the valve spring 16 is sleeved on the valve cone 15 between the upper surface of the valve rod 2 and the spring seat 17, an inner chamber is arranged in the center of the lower end of the valve cone 15, a compression spring 20 is arranged in the inner chamber and is in sliding connection with the inner chamber, the bottom end of the compression spring 20 is abutted against a sealing valve ball 21, and a through hole penetrating through the valve cone 15 is transversely formed in the top end of the inner chamber, the arrangement of the sealing valve ball 21 and the compression spring 20 can ensure that gas generated in the process of piston movement of hydraulic oil is discharged through an inner cavity of the valve cone 15 when the metering pump normally works, so that the metering precision of the metering pump is ensured, if one side of an inlet of the metering pump is closed due to any reason, the pressure release valve is opened, the valve cone 15 of the exhaust valve mechanism is sleeved in the spring guide rod 11 during pressure release, the valve rod is in contact connection with a stepped seat of the spring guide rod 11 through the spherical gasket 13, the impact of the hydraulic oil on the valve rod 2 and the arrangement of the valve spring 16 cause the bottom ends of the valve cone 15 and the valve rod 2 to be continuously separated and closed, so that the discharge of micro bubbles in the hydraulic oil is facilitated, further, the content of the gas in the hydraulic oil is reduced, and the metering precision of the metering pump is ensured.

The utility model discloses still include second O type circle 6 and seal gasket 19, the outer wall of relief valve chamber 1 divide into installation part and the outer part of exploring of pump in the pump, and the top of installation part annular through hole is provided with the external screw thread in the pump for the fixed of relief valve, second O type circle 6 sets up in the top of external screw thread, avoids the excessive of hydraulic oil, and seal gasket 19 sets up and surveys between the part outside installation part and the pump in the pump, can seal installation part in the pump once more.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modification, equivalent change and modification made to the above embodiments by the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A metering pump relief valve with an exhaust function is characterized by comprising a relief valve chamber, an exhaust valve mechanism, a disc spring and a spring guide rod, wherein the exhaust valve mechanism comprises a valve rod, a valve cone and a valve spring, the valve rod is of a hollow structure, an annular groove is formed below the surface of the valve rod, circular through holes are uniformly formed in the annular groove, the valve cone penetrates through the valve rod structure, one end of the valve cone is conical and used for sealing the valve rod, a spring seat is arranged at the other end of the valve cone, a fastening nut is arranged above the spring seat, the valve spring is sleeved on the valve cone, the valve spring is arranged between the upper surface of the valve rod and the spring seat, the relief valve chamber is of a hollow structure, a valve seat is arranged at the bottom end of the relief valve chamber, the exhaust valve mechanism is arranged at the bottom end inside the relief valve chamber, and the exhaust valve mechanism is in sliding connection with the relief valve chamber, the spring guide rod is sleeved at the top end of the exhaust valve mechanism, the disc spring is sleeved on the spring guide rod, and the disc spring is connected with the spring guide rod in a sliding mode.

2. The metering pump pressure relief valve with the exhaust function according to claim 1, wherein a retainer ring is arranged between the valve seat and a valve chamber of the pressure relief valve, an exhaust inlet is arranged at the bottom end of the valve seat, and a first O-ring is arranged outside the exhaust inlet.

3. The metering pump pressure relief valve with the exhaust function as claimed in claim 1, wherein an inner chamber is arranged at the center of the lower end of the valve cone, a compression spring is arranged in the inner chamber, the compression spring is slidably connected with the inner chamber, a sealing valve ball is abutted to the bottom end of the compression spring, and a through hole transversely penetrating through the valve cone is formed in the top end of the inner chamber.

4. A metering pump relief valve with venting function as defined in claim 1, further comprising a support washer and an axial thrust disk, wherein the bottom end of the spring guide rod is provided with a step seat, the support washer is sleeved between the step seat and the belleville spring, and the axial thrust disk is disposed between the belleville spring and the adjusting screw.

5. The metering pump pressure relief valve with air exhaust function of claim 4, further comprising a spherical gasket, wherein the spherical gasket is sleeved on the valve rod, and the bottom end of the stepped seat is correspondingly provided with a concave groove.

6. A metering pump relief valve with an exhaust function as claimed in claim 1, further comprising a second O-ring and a sealing gasket, wherein the outer wall of the relief valve chamber is divided into a pump inner mounting portion and a pump outer protruding portion, an annular through hole is formed in the bottom end of the pump inner mounting portion, an external thread is formed above the annular through hole, the second O-ring is arranged above the external thread, and the sealing gasket is arranged between the pump inner mounting portion and the pump outer protruding portion.

7. The metering pump pressure relief valve with an air exhaust function according to claim 1, further comprising an adjusting screw and a hexagonal nut, wherein the hexagonal nut is arranged on the adjusting screw, the hexagonal nut is in threaded connection with the adjusting screw, the adjusting screw is sleeved on the spring guide rod, and the adjusting screw is in threaded connection with the top end of the valve chamber of the pressure relief valve through a thread pair.

8. The metering pump pressure relief valve with air venting function of claim 7, further comprising a protective cover, wherein the protective cover is sleeved on the adjusting screw.