CN215566416U

CN215566416U - Chute transmission type plunger stroke adjusting mechanism of metering pump

Info

Publication number: CN215566416U
Application number: CN202121135077.1U
Authority: CN
Inventors: 朱启发
Original assignee: Zhejiang Ligao Pump Technology Co ltd
Current assignee: Zhejiang Ligao Pump Technology Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-01-18
Anticipated expiration: 2031-05-25

Abstract

The utility model belongs to the field of metering pumps, and particularly relates to a chute-driven plunger stroke adjusting mechanism of a metering pump. The position of the eccentric wheel is changed through the structures such as the main shaft, the adjusting mandrel, the transmission pin, the threaded screw rod and the like so as to realize the adjustment of the plunger stroke, and the transmission between the eccentric wheel and the adjusting mandrel is realized through the structures of the transmission pin and the chute, so that the structure is simpler, the processing is easier, and the transmission is more stable.

Description

Chute transmission type plunger stroke adjusting mechanism of metering pump

Technical Field

The utility model belongs to the field of metering pumps, and particularly relates to a chute transmission type plunger stroke adjusting mechanism of a metering pump.

Background

Metering pumps are one type of fluid delivery machine that are characterized by the ability to maintain a constant flow rate independent of discharge pressure. The metering pump can simultaneously complete the functions of conveying, metering and adjusting, thereby simplifying the production process flow. By using a plurality of metering pumps, several media can be input into the process flow according to an accurate proportion for mixing. Due to its own prominence, metering pumps are now widely used in various industrial fields such as petrochemical industry, pharmaceutical industry, food industry, and the like. The metering pump generally comprises a worm and gear driving mechanism, an eccentric slewing mechanism, a plunger reciprocating mechanism, a stroke adjusting mechanism and a diaphragm pump head mechanism, wherein the worm and gear driving mechanism drives the eccentric slewing mechanism to move, an eccentric wheel of the eccentric slewing mechanism drives a plunger in the plunger reciprocating mechanism to reciprocate, the plunger drives a diaphragm of the diaphragm mechanism to deform, and the deformation of the diaphragm can change the volume of a pump cavity, so that the aim of conveying a medium is fulfilled.

The stroke adjusting device commonly adopted in the traditional metering pump has the defects of low accuracy, low overload capacity and the like. Chinese patent publication No. CN203321767U discloses an adjustable metering pump, the metering pump adjusting device includes an adjusting seat 600, an adjusting handwheel 602, an adjuster core 607, an eccentric wheel 603 and an eccentric rod 604, the eccentric rod 604 and the eccentric wheel 603 are connected in a sleeved manner, the eccentric wheel 603 is provided with a limit guide bolt 608, the eccentric rod 604 is provided with a limit guide slot 609, the limit guide bolt 608 and the limit guide slot 609 are connected in a matched manner, one end of the eccentric rod 604 is connected in a matched manner with the adjuster core 607, and the adjuster core 607 is sleeved on the adjusting seat 600. Although the adjusting device can adjust the stroke of the plug and meet the requirements of precision and overload capacity, the adjusting device has the problems of complex structure and difficult screw machining.

Chinese patent publication No. CN208845331U discloses a stroke adjusting mechanism for a vertical metering pump, which includes a threaded bushing fixedly connected to a metering pump, the threaded bushing has a threaded lead screw connected to a main shaft of the metering pump through a threaded connection inside, a cavity is formed at a connection pipe diameter of the threaded lead screw and the threaded bushing, an axial scale is fixedly connected to an outer wall of the threaded bushing, a dial seat and an operating hand wheel are fixedly connected to an end of the threaded lead screw penetrating the threaded bushing through a screw, a circumferential scale cylinder is fixedly connected to an inner side of the dial seat, and an axial scale is fixedly connected to an outer side of the threaded bushing. Although the stroke adjusting mechanism of the vertical metering pump can overcome the defects, the threaded screw rod is directly locked in a jacking mode of the jacking block, the jacking block and the threaded screw rod are abraded in the mode, and the service life of the threaded screw rod can be influenced.

SUMMERY OF THE UTILITY MODEL

In order to make up the defects of the prior art, the utility model provides a technical scheme of a chute transmission type plunger stroke adjusting mechanism of a metering pump.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized by comprising a main shaft, an eccentric wheel, an adjusting mandrel, a transmission pin, an installation seat component, a threaded screw rod, a first handle, a lock nut and a locking rod, wherein the eccentric wheel is sleeved on the main shaft and can horizontally move along the radial direction of the main shaft, the adjusting mandrel is inserted in an inner cavity of the main shaft and can axially move along the main shaft, a through inclined chute is formed in the adjusting mandrel, a through groove corresponding to the inclined chute is formed in the main shaft, two sides of the eccentric wheel are respectively arranged in installation holes corresponding to the through groove and the inclined chute, the transmission pin is inserted in the inclined chute, the through groove and the two installation holes, the installation seat component is used for being installed in a matched manner with a pump body, the threaded screw rod is in screwed connection with the installation seat component and is rotatably installed with the adjusting mandrel, the first handle is installed in a matched mode with the threaded screw rod, the locking nut is in threaded matching on the threaded screw rod, the locking rod is in threaded matching on the installation seat assembly, a blind hole is formed in the locking nut, one end, facing the locking nut, of the locking rod is inserted into the blind hole and tightly supports the locking nut, locking of the threaded screw rod is achieved, when the threaded screw rod drives the adjusting mandrel to axially move relative to the main shaft, the inclined sliding groove of the adjusting mandrel can drive the transmission pin and the eccentric wheel to radially move relative to the main shaft, and accordingly stroke of the plunger is adjusted.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that first flat grooves communicated with the through grooves are formed in two sides of the main shaft, so that plane blocks with two planar side surfaces are formed at corresponding positions of the main shaft, second flat grooves corresponding to the plane blocks and communicated with the two mounting holes are formed in the eccentric wheel, and the second flat grooves are buckled with the plane blocks and are in sliding connection.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that the second flat chute extends from one side of the eccentric wheel to the center of the eccentric wheel.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that fourth flat grooves are formed in two sides of the adjusting mandrel respectively and are attached to the second flat grooves, and the inclined sliding grooves penetrate through the fourth flat grooves in the two sides.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that third flat grooves are formed in two sides of a transmission pin respectively and are in sliding fit with the inclined sliding grooves of the adjusting core shaft.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that the lower end of the locking rod is sleeved with a shaft clamp, and the shaft clamp is used for being in limit fit with the inner wall of the mounting seat component.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that when the locking rod is in a state of tightly pushing a locking nut, the distance between the shaft clamp and the inner wall of the mounting seat component is smaller than the length of the locking rod extending into the blind hole.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that a second handle is installed at the upper end of the locking rod in a matched mode.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that a first end cover is installed on the installation seat assembly in a matched mode, and the locking rod is matched with the first end cover in a threaded connection mode.

The chute transmission type plunger stroke adjusting mechanism of the metering pump is characterized in that the mounting seat assembly comprises a first mounting seat and a second mounting seat, wherein the first mounting seat is used for being mounted with the pump body in a matched mode, and the second mounting seat is used for being mounted with the first mounting seat in a matched mode; the first handle is installed in a matched mode with the threaded screw rod through a second end cover, and the second end cover covers the outside of the main body of the second installation base.

The utility model has the advantages that:

1) according to the plunger stroke adjusting mechanism, the position of the eccentric wheel is changed through the structures such as the main shaft, the adjusting mandrel, the transmission pin, the threaded screw rod and the like, so that the adjustment of the plunger stroke is realized, and the transmission is realized between the eccentric wheel and the adjusting mandrel by adopting the structures of the transmission pin and the chute, so that the plunger stroke adjusting mechanism is simpler in structure, easier to process and more stable in transmission;

2) the main shaft, the eccentric wheel, the adjusting mandrel and the transmission pin are all provided with flat groove structures, and the structural design can reduce the volume of the eccentric slewing mechanism, so that the structure is more compact;

3) the locking rod and the locking nut are matched for use, so that the purpose of locking the threaded screw rod is achieved.

Drawings

FIG. 1 is a schematic view of a metering pump with a chute-driven plunger stroke adjustment mechanism to which the present invention is applied;

FIG. 2 is a schematic cross-sectional view of a metering pump with a chute-driven plunger stroke adjustment mechanism to which the present invention is applied;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a second schematic sectional view of a metering pump with a chute-driven plunger stroke adjustment mechanism to which the present invention is applied;

FIG. 5 is a schematic diagram of the structure of an eccentric rotary mechanism in a metering pump with a chute-driven plunger stroke adjustment mechanism to which the present invention is applied;

FIG. 6 is a schematic view of a main shaft of a metering pump with a chute-driven plunger stroke adjusting mechanism, to which the present invention is applied;

FIG. 7 is a schematic sectional view of a main shaft of a metering pump with a chute-driven plunger stroke adjusting mechanism to which the present invention is applied;

FIG. 8 is a schematic front view of an eccentric wheel of a metering pump having a chute-driven plunger stroke adjustment mechanism to which the present invention is applied;

FIG. 9 is a schematic top view of an eccentric wheel of a metering pump with a chute-driven plunger travel adjustment mechanism to which the present invention is applied;

FIG. 10 is a schematic top view of a regulating spindle of a metering pump having a chute-driven plunger travel regulating mechanism to which the present invention is applied;

FIG. 11 is a schematic front view of a regulating spindle of a metering pump with a chute-driven plunger stroke regulating mechanism to which the present invention is applied;

FIG. 12 is a schematic front view of a drive pin of a metering pump having a chute-driven plunger travel adjustment mechanism to which the present invention is applied;

fig. 13 is a schematic top view of a driving pin of a metering pump with a chute-driven plunger stroke adjusting mechanism to which the present invention is applied.

Detailed Description

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

The utility model will be further explained with reference to the drawings.

The utility model provides a chute transmission formula plunger stroke adjustment mechanism of measuring pump, is applied to a measuring pump that has chute transmission formula plunger stroke adjustment mechanism, as shown in the figure, this measuring pump includes the pump body 1, cooperation installation worm gear actuating mechanism 2, eccentric slewing mechanism 3, plunger reciprocating mechanism 4, stroke adjustment mechanism 5 and diaphragm pump head mechanism on the pump body 1, eccentric slewing mechanism 3 includes main shaft 300, eccentric wheel 301, regulation dabber 302 and driving pin 303, eccentric wheel 301 cup joints in on the main shaft 300 and can follow the radial horizontal migration of main shaft 300, regulation dabber 302 is inserted and is joined in marriage in the inner chamber of main shaft 300 and can be along main shaft 300 axial displacement, set up the oblique spout 30200 that link up on the regulation dabber 302, set up the logical groove 30030200 that corresponds with oblique spout 30200 position on the main shaft 300, eccentric wheel 301 both sides set up respectively in with the mounting hole 30100 that corresponds with logical groove 30000 and oblique spout 30200 position, the two mounting holes 30100 are through holes, the driving pin 303 is inserted into the inclined sliding groove 30200, the through groove 30000 and the two mounting holes 30100, and when the stroke adjusting mechanism 5 drives the adjusting spindle 302 to axially move relative to the main shaft 300, the inclined sliding groove 30200 of the adjusting spindle 302 can drive the driving pin 303 and the eccentric wheel 301 to radially move relative to the main shaft, so as to adjust the stroke of the plunger.

As an optimization: two sides of the main shaft 300 are provided with first flat grooves 30001 communicated with the through grooves 30000, so that a plane block 30002 with two plane side surfaces is formed at the corresponding part of the main shaft 300, the eccentric wheel 301 is provided with second flat grooves 30101 corresponding to the plane block 30002 and communicated with the two mounting holes 30100, and the second flat grooves 30101 are buckled with the plane block 30002 and are in sliding connection. Wherein, the second flat slot 30101 extends from one side of the eccentric wheel 301 to the center of the eccentric wheel 301.

Furthermore, a fourth flat groove 30201 is respectively formed on two sides of the adjusting spindle 302, the inclined sliding groove 30200 penetrates through the fourth flat grooves 30201 on the two sides, and the fourth flat groove 30201 is attached to the second flat groove 30101.

As an optimization: a third flat groove 30300 is respectively formed on two sides of the driving pin 303, and the third flat groove 30300 is in sliding fit with the inclined sliding groove 30200 of the adjusting spindle 302. The driving pin 303 is shielded by a crank sleeved outside the eccentric wheel, so that the driving pin 303 is prevented from being separated.

As an optimization: the stroke adjusting mechanism 5 comprises an installation seat assembly which is used for being installed in a matched mode with the pump body 1, a threaded screw rod 504 which is in threaded fit with the installation seat assembly and is installed in a rotating mode with the adjusting spindle 302, and a first handle 505 which is installed in a matched mode with the threaded screw rod 504, the threaded screw rod is used for driving the adjusting spindle 50302 to move axially relative to the spindle 50300, the locking mechanism comprises a locking nut 506 which is in threaded fit with the threaded screw rod 504 and a locking rod 507 which is in threaded fit with the installation seat assembly, a blind hole 600 is formed in the locking nut 506, and one end, facing the locking nut 506, of the locking rod 507 is inserted into the blind hole 50600 and abuts against the locking nut 506, so that locking of the threaded screw rod 504 is achieved.

Further, the mounting seat assembly includes a first mounting seat 502 for fitting with the pump body 1 and a second mounting seat 503 for fitting with the first mounting seat 502. The first handle 505 is installed in a matching manner with the threaded screw 504 through a second end cap 50100, and the second end cap 50100 covers the main body of the second installation seat 503.

In the above structure, the second end cap 50100 can play a role of dust prevention.

Further, a first end cap 509 is fittingly mounted on the mounting seat assembly, and the locking rod 507 is threadedly fitted with the first end cap 509.

Further, the lower end of the locking rod 507 is sleeved with a shaft clamp 508, and the shaft clamp 508 is used for limiting and matching with the inner wall of the first end cover 509. When the locking rod 507 is in a state of tightly pushing the locking nut 506, the distance between the shaft clamp 508 and the inner wall of the first end cap 509 is less than the length of the locking rod 507 extending into the blind hole 50600.

In the above structure, the shaft clamp 508 and the distance between the shaft clamp and the inner wall of the first end cap 509 are set to prevent the locking rod 507 from being removed from the blind hole 50600.

Further, a second handle is fittingly installed on the upper end of the locking lever 507.

In the above structure, the second handle is provided to facilitate the rotation of the locking lever 507.

When the stroke of the metering pump is adjusted, the locking rod 507 is unscrewed to prevent the locking rod 507 from jacking the locking nut 506, so that the threaded screw rod 504 can move smoothly, the first handle 505 is rotated, the first handle 505 drives the threaded screw rod 504 to rotate, the threaded screw rod 505 moves axially, and the threaded screw rod 505 drives the adjusting mandrel 302 to move axially relative to the main shaft 300, because the adjusting mandrel 302 can only move axially, the eccentric wheel 301 and the transmission pin 303 can only move radially by taking the main shaft 300 as a reference, the inclined chute 30200 of the adjusting mandrel 302 can drive the transmission pin 303 and the eccentric wheel 301 to move radially relative to the main shaft, and therefore the adjustment of the plunger stroke is realized. During movement of the threaded screw 504, the lock nut 506 remains stationary as the threaded screw 504 moves, since the lock nut 506 is in a positive fit with the lock bar 507 through the blind hole 50600. When the threaded screw 504 needs to be locked, the locking rod 507 is screwed down, the locking rod 507 pushes the locking nut 506 tightly, and the threaded screw 504 is pressed through the locking nut 506, so that the threaded screw 504 is locked.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chute transmission type plunger stroke adjusting mechanism of a metering pump is characterized by comprising a main shaft (300), an eccentric wheel (301), an adjusting mandrel (302), a transmission pin (303), a mounting seat assembly, a threaded lead screw (504), a first handle (505), a lock nut (506) and a locking rod (507), wherein the eccentric wheel (301) is sleeved on the main shaft (300) and can horizontally move along the radial direction of the main shaft (300), the adjusting mandrel (302) is inserted in an inner cavity of the main shaft (300) and can axially move along the main shaft (300), a through inclined chute (30200) is formed in the adjusting mandrel (302), a through groove (30000) corresponding to the position of the inclined chute (30200) is formed in the main shaft (300), two sides of the eccentric wheel (301) are respectively arranged in mounting holes (30100) corresponding to the positions of the through groove (30000) and the inclined chute (30200), the transmission pin (303) is inserted into the inclined sliding groove (30200), the through groove (30000) and the two mounting holes (30100), the mounting seat assembly is used for being mounted in a matched manner with the pump body (1), the threaded screw rod (504) is in threaded fit with the mounting seat assembly and is rotatably mounted with the adjusting mandrel (302), the first handle (505) is mounted in a matched manner with the threaded screw rod (504), the lock nut (506) is in threaded fit with the threaded screw rod (504), the locking rod (507) is in threaded fit with the mounting seat assembly, a blind hole (50600) is formed in the lock nut (506), one end, facing the lock nut (506), of the locking rod (507) is inserted into the blind hole (50600) and tightly supports the lock nut (506) so as to lock the threaded screw rod (504), and when the threaded screw rod (504) drives the adjusting mandrel (302) to axially move relative to the main shaft (300), the inclined chute (30200) of the adjusting mandrel (302) can drive the transmission pin (303) and the eccentric wheel (301) to move radially relative to the main shaft (300) so as to adjust the plunger stroke.

2. The chute-driven plunger stroke adjusting mechanism of a metering pump according to claim 1, wherein the two sides of the main shaft (300) are provided with first flat grooves (30001) communicated with the through grooves (30000), so that the corresponding part of the main shaft (300) forms a plane block (30002) with two plane sides, the eccentric wheel (301) is provided with second flat grooves (30101) corresponding to the plane block (30002) and communicated with the two mounting holes (30100), and the second flat grooves (30101) are buckled with the plane block (30002) and are in sliding connection.

3. A chute-driven plunger stroke adjusting mechanism of a metering pump according to claim 2, characterized in that said second flat slot (30101) extends from the eccentric wheel (301) side to the eccentric wheel (301) center.

4. The chute-driven plunger stroke adjusting mechanism of a metering pump as set forth in claim 2, characterized in that a fourth flat groove (30201) is respectively formed on both sides of the adjusting spindle (302), the fourth flat groove (30201) is attached to the second flat groove (30101), and the inclined chute (30200) penetrates through the fourth flat grooves (30201) on both sides.

5. The chute-driven plunger stroke adjusting mechanism of a metering pump as set forth in claim 1, characterized in that a third flat groove (30300) is respectively opened on both sides of the driving pin (303), and the third flat groove (30300) is slidably fitted with the inclined sliding groove (30200) of the adjusting spindle (302).

6. The chute-driven plunger stroke adjusting mechanism of a metering pump as set forth in any one of claims 1 to 5, wherein the lower end of the locking rod (507) is sleeved with a shaft clamp (508), and the shaft clamp (508) is used for being in limit fit with the inner wall of the mounting seat assembly.

7. The chute-driven plunger stroke adjusting mechanism of a metering pump as set forth in claim 6, wherein when the locking rod (507) is in a state of being pressed against the lock nut (506), the distance between the shaft clamp (508) and the inner wall of the mounting seat assembly is smaller than the length of the locking rod (507) extending into the blind hole (50600).

8. The chute-driven plunger stroke adjustment mechanism for a metering pump according to any one of claims 1 to 5, wherein the upper end of the locking lever (507) is fitted with a second handle.

9. The chute-driven plunger stroke adjustment mechanism of a metering pump according to any one of claims 1 to 5, wherein a first end cap (509) is fitted to the mounting seat assembly, and the lock rod (507) is threadedly engaged with the first end cap (509).

10. The chute-driven plunger stroke adjusting mechanism of a metering pump according to any one of claims 1 to 5, characterized in that the mounting seat assembly comprises a first mounting seat (2) for fitting with the pump body (1) and a second mounting seat (3) for fitting with the first mounting seat (2); the first handle (505) is installed in a matched mode with the threaded screw rod (504) through a second end cover (10), and the second end cover (10) covers the outside of the main body of the second installation base (3).