CN217898141U - Adjusting rod accurate positioning mechanism for metering pump - Google Patents

Abstract

The utility model provides a metering pump is with adjusting pole accurate positioning mechanism, relates to metering pump flow control technical field, including: the metering pump comprises a case and a basic shell structure of the metering pump, wherein a protruding end is arranged on one side of the case, and a threaded sleeve is arranged at the port of the protruding end; the adjusting handle comprises an adjusting cylinder body and an adjusting bottom plate arranged on one side of the adjusting cylinder body, internal threads are formed in the adjusting cylinder body, the adjusting cylinder body is in threaded connection with the threaded sleeve, and the adjusting bottom plate at least covers part of the port; the adjusting rod is arranged inside the case, and at least part of the adjusting rod protrudes out of the port; the adjusting base plate is provided with a through hole, the adjusting rod penetrates through the through hole to be arranged on the adjusting handle, the adjusting rod is provided with a front blocking part used for abutting against the outer end face of the adjusting base plate, and the adjusting rod is further provided with a rear blocking part used for abutting against the inner end face of the adjusting base plate. The utility model discloses it is high to adjust the pole regulation precision.

Description

Adjusting rod accurate positioning mechanism for metering pump

Technical Field

The utility model relates to a measuring pump flow control technical field especially relates to a measuring pump is with adjusting pole accurate positioning mechanism.

Background

The hydraulic diaphragm metering pump is also called plunger diaphragm metering pump, and is a metering pump designed by combining the characteristics of plunger metering pump and diaphragm metering pump. For example, an improved structure of a quantity-adjusting control rod for a bypass oil-control metering pump, which is disclosed by the application number CN201720843575.9, comprises the quantity-adjusting control rod and the bypass control rod, and is characterized in that the quantity-adjusting control rod is provided with a quantity-adjusting rod axial oil passage for accommodating the whole length of the bypass control rod, and an oil passage radial passage is arranged at the inner end part of the quantity-adjusting rod axial oil passage on the quantity-adjusting control rod; the bypass control rod is of a hollow tube structure, and one end of the bypass control rod is connected with a plunger positioned in the pump body through a quantity-adjusting bent plate. Not only can enough oil circuit delivery be ensured, but also the appearance volumes of the quantity adjusting control rod and the bypass control rod can be synchronously reduced, and the processing cost is reduced; the pressure-bearing area of the bypass control rod is reduced, the friction coefficient is reduced, the load impact on the quantity-adjusting bent plate structure arranged at the end of the bypass control rod is reduced, and the service life of parts is prolonged; when oil is conveyed, the oil can pass through the internal oil passage, so that the impact of the oil on the oil is buffered, and the fluctuation of the oil level in the pump is reduced.

In fact, the adjusting precision of the adjusting control rod directly influences the flow precision of the pump and plays a decisive role, the improvement of the product precision can solve the problem that the whole process flow precision is not high due to the design defect of a part of owners on the established process pipeline, and users do not need to improve the whole process pipeline in a complicated way, so that a high-precision flow adjusting structure is needed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a metering pump is with adjusting pole accurate positioning mechanism, including: the metering pump comprises a case, a pump body and a pump body, wherein the case is a basic shell structure of the metering pump, a protruding end is arranged on one side of the case, and a threaded sleeve is arranged at a port of the protruding end; the adjusting handle comprises an adjusting cylinder body and an adjusting bottom plate arranged on one side of the adjusting cylinder body, internal threads are formed in the adjusting cylinder body, the adjusting cylinder body is in threaded connection with the threaded sleeve, and the adjusting bottom plate at least covers part of the port; the adjusting rod is arranged inside the case, and at least part of the adjusting rod protrudes out of the port; the adjusting base plate is provided with a through hole, the adjusting rod penetrates through the through hole to be arranged on the adjusting handle, the adjusting rod is provided with a front blocking part used for abutting against the outer end face of the adjusting base plate, and the adjusting rod is further provided with a rear blocking part used for abutting against the inner end face of the adjusting base plate.

Preferably, the adjusting rod includes a thin shaft section and a thick shaft section, wherein an outer diameter of the thin shaft section is matched with the through hole, an outer diameter of the thick shaft section is larger than an aperture of the through hole, the thin shaft section passes through the through hole and protrudes, the thin shaft section is transited to the thick shaft section to form a blocking surface, and the blocking surface is the rear stop portion; the thin shaft section is provided with a clamping part, and the clamping part forms the front blocking part.

Preferably, the clamping portion is a notch retaining ring, the adjusting rod is provided with a clamping groove, and the notch retaining ring is fixedly clamped with the adjusting rod through the clamping groove.

Preferably, in the above technical solution, the clamping portion is a lock nut, the thin shaft section is provided with an external thread, the lock nut is in threaded fit with the thin shaft section, and the direction of the thread of the lock nut is opposite to the direction of the thread of the adjusting handle.

Preferably, in the above technical solution, the adjusting rod is provided with a guide groove, the protruding end is provided with a guide screw, and at least a part of the guide screw penetrates through the protruding end and is disposed in the guide groove.

Preferably, the threaded sleeve is in interference fit with the protruding end, an accommodating groove is formed in the threaded sleeve, and the guide screw is partially located in the accommodating groove.

Preferably, the adjusting handle is further sleeved with a scale ring.

Preferably, in the above technical solution, an outer diameter of the thick shaft section is adapted to an inner diameter of the protruding end, and the thick shaft section is further provided with a sealing ring.

Preferably, the locking nut is provided with a locking layer embedded in the internal thread.

To sum up, the utility model has the advantages of it is following:

1. according to the adjusting handle, the adjusting handle is in threaded fit with the threaded sleeve arranged on the case to achieve that the adjusting handle can rotate relative to the case, the adjusting bottom plate of the adjusting handle is limited by the front gear part and the rear gear part of the adjusting rod, when the adjusting handle rotates relative to the case, the adjusting handle can drive the adjusting rod to do linear motion along the axis direction as long as the adjusting handle rotates in forward rotation or reverse rotation, and the adjusting precision caused by rotation is higher than that of manual drawing and adjusting of the adjusting rod;

2. as one of the preferable options, in one embodiment of the application, the gap retainer ring is used as the front retainer part, and the gap retainer ring is convenient to disassemble and assemble and convenient to replace after failure;

3. as another kind of preferred, this another embodiment of this application adopts lock nut as preceding gear portion, lock nut can make through the part machine tooling, it is more convenient to install, and the cooperation precision is higher, reduce as far as possible when adjustment handle supports to lean on the clearance between adjustment handle and the preceding gear portion when the gear portion of back, in addition, because lock nut's screw thread is opposite with the inside screw thread of adjustment handle, so can avoid adjustment handle to rotate the not hard up influence of friction torque of in-process to lock nut completely, only can play positive effect to lock nut's locking effect, the reliability problem of adjusting has been guaranteed completely

The benefits of further or other details will be discussed in the examples.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present application;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a full sectional view of FIG. 1;

FIG. 4 is a schematic structural diagram of another embodiment of the present application;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a full sectional view of the bitmap 4;

the device comprises a machine case 1, a regulating handle 2, a regulating rod 3, a threaded sleeve 4, a protruding end 11, a regulating cylinder 21, a regulating bottom plate 22, an a-port, a b-through hole 31, a thin shaft section 32, a thick shaft section 311, a clamping groove 312, a blocking surface 5, a notched retainer ring 5, a locking nut 5b, a guide groove 33, a guide screw 6, a containing groove 4-a, a scale ring 7 and a sealing ring 8.

Detailed Description

The terms upper, lower, left, right, front, rear, front, back, top, bottom and the like in the description, or which may be referred to in the specification, are defined with respect to the configurations shown in the drawings, and the words "inner" and "outer" refer to the relative concepts toward and away from the geometric center of a particular component, respectively, and thus may be changed accordingly depending on the position in which it is located and the state of use. Therefore, these and other directional terms should not be construed as limiting terms.

The invention is further explained below with reference to the following examples:

the first embodiment is as follows:

an accurate positioning mechanism of an adjusting rod for a metering pump refers to fig. 1 to 3, and comprises a case 1, an adjusting handle 2 and an adjusting rod 3, wherein the case 1 is a basic shell structure of the metering pump, a protruding end 11 is arranged on the case in a protruding manner, the protruding end 11 is used for installing the adjusting handle 2 and the adjusting rod 3, a flow passage and a flow passage opening for circulation are arranged on the adjusting rod 3, and the blocking degree of the flow passage opening is determined by adjusting the position of the adjusting rod 3 in the case 1, so that the flow rate is controlled; a threaded sleeve 4 is arranged at a port a of the protruding end 11 of the case 1, the adjusting handle 2 comprises an adjusting cylinder 21 and an adjusting bottom plate 22 arranged on one side of the adjusting cylinder 21, internal threads are formed in the adjusting cylinder 21, the adjusting cylinder 21 is in threaded connection with the threaded sleeve 4, and the adjusting bottom plate 22 at least shields part of the port a; adjust pole 3 and set up inside quick-witted case 1, and at least partial overhang a sets up, and specifically a bit has seted up through-hole b on the adjusting bottom plate 22, adjusts pole 3 and passes adjustment handle 2 setting through-hole b, is provided with the preceding gear portion that is used for leaning on the outer terminal surface of adjusting bottom plate 22 on adjusting pole 3, still is provided with the back gear portion that is used for leaning on the terminal surface in adjusting bottom plate 22 on adjusting pole 3.

More specifically, the adjusting lever 3 includes a thin shaft section 31 and a thick shaft section 32, wherein the outer diameter of the thin shaft section 31 is matched with the through hole b, the outer diameter of the thick shaft section 32 is larger than the aperture of the through hole b, the thin shaft section 31 passes through the through hole b and is arranged in a protruding manner, when the thin shaft section 31 is transited to the thick shaft section 32, a stepped blocking surface 312 is formed between the thick shaft section 32 and the thin shaft section 31, the blocking surface 312 is the above-mentioned rear gear part, the thin shaft section 31 is provided with a clamping part, and the clamping part forms a front gear part; that is, the adjusting bottom plate 22 is located between the blocking surface 312 and the blocking portion, and by adjusting the adjusting handle 2, a relative screw pair transmission (similar to the rotation between the nut and the fixed screw rod structure) is generated between the adjusting handle 2 and the screw sleeve 4; in this application, when adjustment handle 2 rotates clockwise, adjustment handle 2's outer terminal surface supports and leans on the terminal surface in screens portion, because swivel nut 4 is the structure fixed for quick-witted case 1, consequently, screw-thread fit between adjustment handle 2 and swivel nut 4 adjusts handle 2 and makes when adjustment handle 2 rotates and prolong self axial towards the direction motion of keeping away from quick-witted case 1, the screens piece that supports and lean on with adjustment handle 2 also drives regulation pole 3 towards the direction motion of keeping away from quick-witted case 1 under the effect of force when adjustment handle 2 moves, and the same is so, when adjustment handle 2 anticlockwise rotates, adjustment handle 2's outer terminal surface supports and leans on stopping face 312, adjustment handle 2 moves towards being close to quick-witted case 1 direction and prolonging self axis direction this moment, drive regulation pole 3 and move towards the direction of deepening quick-witted case 1 inside along self axis direction then, realize the accurate adjustment of whole device. In addition, it should be noted that, the clockwise direction and the counterclockwise direction are described in the present application for convenience of description, and in fact, the rotation direction is set according to a specific thread direction, so the thread may be left-handed or right-handed, as long as the thread matching between the adjustment handle 2 and the thread insert 4 enables the adjustment handle 2 to move axially relative to the box.

In the embodiment of the application, for the installation of making things convenient for the complete machine, screens portion does not make with regulation pole 3 integrated into one piece, but the later stage installs additional, therefore, be provided with joint groove 311 on adjusting pole 3, the breach retaining ring 5a of breach is seted up for locating to the screens portion, breach retaining ring 5a establishes in the joint groove 311 on adjusting pole 3 through the breach card on it and forms effectual fixed, and when the long-time use of breach retaining ring 5a became invalid, can dismantle breach retaining ring 5a that gets off the renewal through the mode of artificial dismantlement, breach retaining ring 5a easy dismounting, and simple structure low in manufacturing cost.

Furthermore, a guide groove 33 is formed in the adjusting rod 3, the guide groove 33 is formed by inwards forming the side surface of a thick shaft section 32 of the adjusting rod 3, the guide groove 33 is formed along the axis direction of the adjusting rod, a guide screw 6 is arranged on the protruding end 11, and at least part of the guide screw 6 penetrates through the wall surface of the protruding end 11 and is arranged in the guide groove 33; in addition, the screw sleeve 4 is in interference fit with the protruding end 11, the screw sleeve 4 is provided with a containing groove 4-a, the nut part of the guide screw 6 is arranged in the containing groove 4-a, although the screw sleeve 4 is in interference fit with the protruding end 11, the interference fit between the screw sleeve 4 and the protruding end 11 can also fail under long-time rotation, and therefore, as further fixation, the guide screw 6 is partially arranged in the containing groove 4-a formed in the screw sleeve 4, and the screw sleeve 4 can be effectively prevented from sliding off from the protruding end 11 after the interference fit fails.

The outer diameter of the thick shaft section 32 is matched with the inner diameter of the protruding end 11, and the thick shaft section 32 is provided with a sealing ring 8. Preventing the liquid in the metering pump from overflowing from the port a.

The second embodiment:

for further improvement of the first embodiment, although the notched retainer ring 5a in the first embodiment is convenient to assemble and disassemble and low in manufacturing cost, a certain gap is designed between the notched retainer ring 5a and the clamping groove 311 for convenience in installation, and although the gap can be controlled to be smaller than a national recommended standard value which is not more than +/-1%, the gap is still larger in practical application, a method of bending the notched retainer ring 5a to enable the retainer ring to have certain elasticity along the axial direction is generally adopted to make up the gap, but when the notched retainer ring 5a and the adjusting handle 2 perform sliding pair transmission, the notched retainer ring 5a is easy to fall off from the adjusting rod 3 due to the action of friction torque, so that the product adjustment fails, and the stability risk is larger; although the notch retaining ring 5a has certain spring characteristics in the axial direction, the elastic force of the elasticity itself is changed due to the change of the acting force, and when all resistance of the adjusting rod 3 is extremely large, the elastic force is increased, so that the gap is enlarged again, and the adjusting precision is influenced.

Therefore, the difference from the first embodiment is that, in the present embodiment, referring to fig. 4 to 6, the thin shaft section 31 is provided with an external thread, the locking portion is a lock nut 5b, the lock nut 5b is in threaded fit with the external thread on the thin shaft section 31, the thread direction of the lock nut 5b is opposite to the thread direction on the adjustment handle 2, the external threads on the lock nut 5b and the thin shaft section 31 are both accurately formed by part machining, after assembly, when the adjustment handle 2 is attached to the blocking surface 312, a certain installation gap still exists between the lock nut 5b and the outer end surface of the adjustment handle 2, but in the case of locking the lock nut 5b, the installation gap can be controlled to be small, in addition, the adjustment mode of the adjustment handle 2 is the same as that in the first embodiment, when the adjustment handle 2 is adjusted toward the cabinet 1, adjusting handle 2 and the laminating of face 312 that blocks promote adjust pole 3 and move toward quick-witted case 1 is inside, when adjusting handle 2 is adjusted to keeping away from quick-witted case 1 direction, adjusting handle 2 leans on promoting to adjust pole 3 and moves toward quick-witted case 1 outside with lock nut 5b counterbalance, thereby realize flow control, mode through locking screw, structurally, the size of required clearance can be controlled completely to the screw thread of seting up on lock nut 5b and the adjust pole 3 that make through the finish machining of lathe, in addition in this embodiment, lock nut 5b opposite with adjusting handle 2 inside screw thread direction has been adopted, can avoid adjusting handle 2 not hard up influence to lock nut 5b at the friction torque of commentaries on classics in-process completely, only can play positive effect to lock nut 5 b's locking effect, the reliability of volume of transferring has been guaranteed. Lock nut 5b adopts the nut of taking the non-metallic insert, and it has the locking layer to inlay on lock nut 5 b's the internal thread promptly, and the locking layer material generally is nylon, locking principle: the internal thread of the nut is coated by a layer of non-metallic material, when the external thread is screwed in, the non-metallic material is damaged and fills up the gap matched with the thread, the resistance in the convolution is increased, and the anti-loosening and locking effects are achieved.

Further, the adjusting handle of the embodiment is further sleeved with a scale ring 7 for displaying scale marks in the adjusting process.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

1. The utility model provides a metering pump is with adjusting pole accurate positioning mechanism which characterized in that, including:

the metering pump comprises a case, a pump body and a pump body, wherein the case is of a basic shell structure of the metering pump, one side of the case is provided with a protruding end, and a threaded sleeve is arranged at a port of the protruding end;

the adjusting handle comprises an adjusting cylinder body and an adjusting bottom plate arranged on one side of the adjusting cylinder body, internal threads are formed in the adjusting cylinder body, the adjusting cylinder body is in threaded connection with the threaded sleeve, and the adjusting bottom plate at least covers part of the port;

the adjusting rod is arranged inside the case, and at least part of the adjusting rod protrudes out of the port;

the adjusting base plate is provided with a through hole, the adjusting rod penetrates through the through hole to be arranged on the adjusting handle, the adjusting rod is provided with a front blocking part used for abutting against the outer end face of the adjusting base plate, and the adjusting rod is further provided with a rear blocking part used for abutting against the inner end face of the adjusting base plate.

2. The adjusting rod accurate positioning mechanism for the metering pump according to claim 1, characterized in that the adjusting rod comprises a thin shaft section and a thick shaft section, wherein the outer diameter of the thin shaft section is matched with the through hole, the outer diameter of the thick shaft section is larger than the aperture of the through hole, the thin shaft section is arranged to protrude through the through hole, the thin shaft section is transited to the thick shaft section to form a blocking surface, and the blocking surface is the rear blocking part; and a clamping part is arranged on the thin shaft section, and the clamping part forms the front stop part.

3. The adjusting rod accurate positioning mechanism for the metering pump according to claim 2, characterized in that the clamping portion is a notched check ring, the adjusting rod is provided with a clamping groove, and the notched check ring is clamped and fixed with the adjusting rod through the clamping groove.

4. The adjusting rod accurate positioning mechanism for the metering pump as claimed in claim 2, wherein the locking portion is a lock nut, the thin shaft section is provided with an external thread, the lock nut is in threaded fit with the thin shaft section, and the direction of the thread of the lock nut is opposite to the direction of the thread of the adjusting handle.

5. The adjusting rod fine positioning mechanism for the metering pump as claimed in claim 1, wherein the adjusting rod is provided with a guide slot, the protruding end is provided with a guide screw, and the guide screw is at least partially arranged in the guide slot through the protruding end.

6. The adjusting rod accurate positioning mechanism for the metering pump according to claim 5, wherein the threaded sleeve is in interference fit with the protruding end, and a receiving groove is formed on the threaded sleeve, and the guide screw is partially located in the receiving groove.

7. The adjusting rod accurate positioning mechanism for the metering pump as claimed in claim 1, wherein the adjusting handle is further sleeved with a scale ring.

8. The adjusting rod fine positioning mechanism for the metering pump as claimed in claim 2, wherein the outer diameter of the thick shaft section is matched with the inner diameter of the protruding end, and the thick shaft section is further provided with a sealing ring.

9. The mechanism of claim 4, wherein the locking nut is embedded with a locking layer on its internal thread.

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