CN214944772U

CN214944772U - A three plunger diaphragm pumps for rubber production

Info

Publication number: CN214944772U
Application number: CN202120392716.6U
Authority: CN
Inventors: 陈华锋; 王文成; 朱建华
Original assignee: Zhejiang Transfar Synthetic Materials Co ltd
Current assignee: Zhejiang Transfar Synthetic Materials Co ltd
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-11-30
Anticipated expiration: 2031-02-22

Abstract

The utility model belongs to the technical field of chemical machinery, a three plunger diaphragm pumps for rubber production is related to, including the pump body that has the pump chamber, the axial is provided with the pump shaft in the pump chamber, and the pump shaft is connected with the motor, and the one end of three plunger subassembly is eccentric respectively and cup joints on the pump shaft, and the other end is connected three diaphragm that sets up on the pump head respectively, first pump shaft spare, second pump shaft spare, third pump shaft spare and the fourth pump shaft spare that the pump shaft includes that mutual axial cup joints and connects through quick detach mechanism, wherein, the tip of first pump shaft spare, second pump shaft spare and third pump shaft spare is equipped with an eccentric disc respectively. The three-plunger diaphragm pump is applied to rubber production, small fluctuation and high-precision control of flow are realized through reciprocating motion of the three plunger assemblies, and the three-plunger diaphragm pump is flexible in disassembly, convenient and fast, easy to clean and maintain and suitable for production of rubber products.

Description

A three plunger diaphragm pumps for rubber production

Technical Field

The utility model belongs to the technical field of chemical machinery, a measuring pump for in the rubber production is related to, especially, relate to a three plunger diaphragm pump for rubber production.

Background

The metering pump is an important device in rubber production, and in the traditional rubber production process, the metering pump of the American Starfish sea (Neptune) is adopted, and although the single-plunger diaphragm pump device is reliable in operation, the problem of large fluctuation of conveying flow exists, and the flow regulation and operation are not favorable for observation.

The magnetic driving gear pump produced by Germany, such as a gear metering pump with the brand of sky ink, utilizes the engagement of a male rotor and a female rotor to transport a medium, the clearance between the male rotor and the female rotor is very small, the requirement on the cleanliness of a liquid medium is very high, and the gear pump cannot contain a solid medium or a liquid medium which is easy to crystallize. The catalyst is only suitable for a rubber production system of a nickel catalyst, and an aluminum catalyst is commonly used in the catalyst for rubber production, white crystals can be separated out when the catalyst meets air, and if the catalyst is conveyed by a gear pump, a pump body is easily damaged, and the maintenance cost is increased.

At present, a metering pump which has small flow fluctuation, high precision and flexible structure and can be suitable for rubber production is urgently needed.

Disclosure of Invention

The purpose of this application is to solve the above-mentioned problem, provide a three plunger diaphragm pump for rubber production.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the application creatively provides a three plunger diaphragm pump for rubber production, including the pump body that has the pump chamber, the axial is provided with the pump shaft in the pump chamber, and the pump shaft is connected with the motor, and the one end off-centre of plunger subassembly cup joints on the pump shaft, and the diaphragm of setting on the pump head is connected to the other end, the pump shaft includes that mutual axial cup joints and first pump shaft spare, second pump shaft spare, third pump shaft spare and the fourth pump shaft spare that connects through quick detach mechanism, wherein, the tip of first pump shaft spare, second pump shaft spare and third pump shaft spare is equipped with an eccentric disc respectively, the plunger subassembly has threely, and the one end of three plunger subassembly is cup jointed respectively on three eccentric disc, and the setting is connected respectively on three diaphragm to the other end.

In foretell three plunger diaphragm pumps for rubber production, quick detach mechanism is including fixed connecting axle of establishing in the pump shaft of cover, and the one end threaded connection of this connecting axle has the shaft cap, and the other end swivelling joint of connecting axle has closing device.

In the above three-plunger diaphragm pump for rubber production, one end of the connecting shaft is perpendicular to the axial through hole, and the compressing device includes a rotating shaft disposed in the through hole of the connecting shaft and a rotating compressing portion fixed on the rotating shaft.

In the above three-plunger diaphragm pump for rubber production, the rotary compression part comprises an eccentric compression wheel eccentrically connected to the rotary shaft and a compression rod connected to the eccentric compression wheel.

In foretell three plunger diaphragm pumps for rubber production, the week side of connecting axle is equipped with along axially extended spacing strip, first pump shaft spare, second pump shaft spare, third pump shaft spare and fourth pump shaft spare cooperate with the connecting axle through the shaft hole that has the spacing groove respectively, and wherein spacing groove forms circumference fixedly with spacing strip cooperation.

In the above three-plunger diaphragm pump for rubber production, a plurality of annular grooves are provided in the circumferential direction of each of the eccentric discs.

In foretell three plunger diaphragm pumps for rubber production, first pump shaft spare, second pump shaft spare and third pump shaft spare include an eccentric disc and a spacer shaft respectively, fourth pump shaft spare includes an end shaft, and the axis of each spacer shaft and end shaft coincides each other, and the distance of the outer wall that the telecentric vision of eccentric disc to the axis is greater than the spacer shaft to the distance of pump shaft axis, and the nearly heart end of eccentric disc is less than the outer wall of spacer shaft to the distance of pump shaft axis to the distance of axis, and when first pump shaft spare, second pump shaft spare and third pump shaft spare axial connection, the center of three eccentric disc has the contained angle that the angle is 120 respectively to between the perpendicular of pump shaft axis.

In the above three-plunger diaphragm pump for rubber production, one end of the pump shaft has an arc-shaped portion that is fitted with the eccentric pinch roller.

In the above three-plunger diaphragm pump for rubber production, the arc-shaped portion is made of silica gel.

In the above three-plunger diaphragm pump for rubber production, the plunger assembly includes an annular sleeve and a plunger rod hinged at one end of the annular sleeve, the three annular sleeves are in clearance fit with the three eccentric discs respectively, and each annular sleeve covers a plurality of annular grooves on the corresponding eccentric disc.

Compared with the prior art, the application has the advantages that:

1) the three-plunger diaphragm pump is applied to rubber production, small fluctuation and high-precision control of flow are realized through reciprocating motion of the three plunger assemblies, and the three-plunger diaphragm pump is flexible in disassembly, convenient and fast, easy to clean and maintain and suitable for production of rubber products.

2) The precision metering can reach +/-0.5%, and the product contains solid particles with the particle size of 500 microns and can still work normally without fine filtration. The system cost is further reduced, the related maintenance is simplified, and the requirement of a medium with the viscosity of 0.2-3000 cps can be met.

Drawings

Fig. 1 is a schematic diagram of a structure splitting state provided in the present application.

Fig. 2 is a schematic structural diagram provided in the present application.

Fig. 3 is a partial structural schematic diagram provided in the present application.

Fig. 4 is a partial cross-sectional structural view provided in the present application.

In the figure, a pump body 1, a pump cavity 10, a pump shaft 2, an eccentric disc 20, a shaft hole 200, a limiting groove 201, a first pump shaft piece 21, a second pump shaft piece 22, a third pump shaft piece 23, a fourth pump shaft piece 24, an annular groove 25, a spacing shaft 26, an end shaft 27, an arc-shaped part 28, a motor 3, a plunger assembly 4, an annular sleeve 41, a plunger rod 42, a pump head 5, a diaphragm 6, a quick release mechanism 7, a connecting shaft 70, a limiting strip 701, a shaft cap 71, a pressing device 72, a rotating shaft 721 and a rotating pressing part 722 are arranged.

Detailed Description

Further illustrated by the following specific examples;

as shown in fig. 1, 2, 3 and 4, a three-plunger diaphragm pump for rubber production comprises a pump body 1 with a pump cavity 10, a pump shaft 2 is axially arranged in the pump cavity 10, and the pump shaft 2 is axially connected with a motor 3 to realize axial rotation of the pump shaft 2. The pump shaft 2 comprises a first pump shaft part 21, a second pump shaft part 22, a third pump shaft part 23 and a fourth pump shaft part 24 which are axially sleeved with each other and connected through a quick-release mechanism 7, wherein the end parts of the first pump shaft part 21, the second pump shaft part 22 and the third pump shaft part 23 are respectively provided with an eccentric disc 20. The centers of the three eccentric discs 20 have an angle to the perpendicular of the axes. The one end of three plunger subassembly 4 is eccentric respectively cup joints on pump shaft 2, and the other end is connected three setting respectively on diaphragm 6, and diaphragm 6's border is passed through the diaphragm plate and is connected on pump head 5, has the cavity that supplies liquid to flow in the pump head 5, and the cavity has feed inlet and discharge gate, can realize the control of cavity volume through diaphragm 6's activity to realize the accurate pump sending of liquid material. Pump shaft 2 is for dismantling the connection to nimble dismouting helps the washing and the maintenance in the rubber production process, reduces the maintenance cost.

Specifically, the first pump shaft element 21, the second pump shaft element 22 and the third pump shaft element 23 respectively include an eccentric disc 20 and a spacer shaft 26, the fourth pump shaft element 24 includes an end shaft 27, and the axes of the respective spacer shaft 26 and the end shaft 27 coincide with each other.

The spacing shaft 26 of the first pump shaft element 21 is connected to the motor 3, the eccentric disc 20 of the first pump shaft element 21 is connected to the spacing shaft 26 of the second pump shaft element 22, the eccentric disc 20 of the second pump shaft element 22 is connected to the spacing shaft 26 of the third pump shaft element 23, and the eccentric disc 20 of the third pump shaft element 23 is connected to the end shaft 27 of the fourth pump shaft element 24.

The distance from the far end of the eccentric disc 20 to the axis of the pump shaft 2 is larger than the distance from the outer wall of the spacing shaft 26 to the axis, and the distance from the near end of the eccentric disc 20 to the axis of the pump shaft 2 is smaller than the distance from the outer wall of the spacing shaft 26 to the axis.

The plunger assembly 4 comprises an annular sleeve 41 and a plunger rod 42 hinged at one end of the annular sleeve 41, and the three annular sleeves 41 are respectively in clearance fit with the three eccentric discs 20. The width of the annular sleeve 41 is 0.1-0.5 mm smaller than that of the eccentric disc 20, and the annular sleeve 41 is axially and relatively fixed through the spacing shafts 26 or the end shafts 27 on the two sides of the eccentric disc 20, so that the influence on the precision caused by overlarge axial movement is avoided.

The quick release mechanism 7 comprises a connecting shaft 70 fixedly sleeved in the pump shaft 2, one end of the connecting shaft 70 is in threaded connection with a shaft cap 71, and the other end of the connecting shaft 70 is in rotary connection with a pressing device 72.

One end of the connecting shaft 70 is perpendicular to the axial through hole, and the pressing device 72 includes a rotating shaft 721 provided in the through hole of the connecting shaft 70 and a rotating pressing portion 722 fixed to the rotating shaft 721. The rotating pressing part 722 includes an eccentric pressing wheel eccentrically coupled to the rotating shaft 721 and a pressing lever coupled to the eccentric pressing wheel.

The periphery of the connecting shaft 70 is provided with a limit strip 701 extending along the axial direction, the first pump shaft element 21, the second pump shaft element 22, the third pump shaft element 23 and the fourth pump shaft element 24 are respectively matched with the connecting shaft 70 through a shaft hole 200 with a limit groove 201, and the limit groove 201 and the limit strip 701 are in interference fit to form circumferential fixation. The shaft holes 200 of the first pump shaft element 21, the second pump shaft element 22, the third pump shaft element 23 and the fourth pump shaft element 24 are opposite, and when the limiting grooves 201 correspond to each other, the first pump shaft element 21, the second pump shaft element 22 and the third pump shaft element 23 are axially connected, and at the moment, included angles of 120 degrees are formed between the centers of the three eccentric discs 20 and perpendicular lines of the axis of the pump shaft 2 respectively. The motion frequency of the three plunger assemblies 4 is kept consistent, and the precision of the diaphragm pump is ensured.

The end of the fourth pump shaft 24 on the pump shaft 2 has an arc 28, and the arc 28 cooperates with an eccentric pinch roller. The arcuate portion 28 is formed of silicone.

A plurality of annular grooves 25 are formed in the circumferential direction of each eccentric disc 20. Each annular sleeve 41 covers a number of annular grooves 25 on the corresponding eccentric disc 20. The annular groove 25 can be used for attaching more lubricating oil, so that the annular sleeve 41 and the pump shaft 2 are ensured to be matched smoothly and stably.

The pump head 5 is made of polyvinylidene fluoride, polytetrafluoroethylene, stainless steel, titanium alloy or hastelloy.

The working principle of the utility model is as follows:

when the pump shaft assembly is used, the annular sleeves 41 of the three plunger assemblies 4 are respectively sleeved on the three eccentric discs 20 of the first pump shaft element 21, the second pump shaft element 22 and the third pump shaft element 23, then the shaft holes 200 of the first pump shaft element 21, the second pump shaft element 22, the third pump shaft element 23 and the fourth pump shaft element 24 are sequentially opposite, the limiting grooves 201 are correspondingly connected in an axial direction, included angles of 120 degrees are formed between the centers of the three eccentric discs 20 and a vertical line of the axis of the pump shaft 2 respectively, the connecting shaft 70 is inserted into the shaft hole 200 of the pump shaft 2, the limiting strips 701 are inserted into the limiting grooves 201 correspondingly, and axial accuracy is guaranteed.

One end of the connecting shaft 70 is locked by a shaft cap 71, and the other end of the connecting shaft is used for enabling the far end of the eccentric pressing wheel to tightly press the arc-shaped part 28 by rotating the pressing device 72, so that the pump shaft 2 is locked.

The pump shaft 2 is arranged in the pump cavity 10, a motor shaft of the motor 3 is sleeved at one end, provided with a shaft cap 71, of the pump shaft 2 through a connecting piece, and the motor shaft can be fixed with the pump shaft 2 in a mechanical connection or welding mode. The motor 3 rotates to drive the pump shaft 2 to move axially, the plunger assembly 4 sequentially drives the diaphragm 6 to move along with the eccentric disc 20, and the control of the cavity volume can be realized through the movement of the diaphragm 6, so that the accurate pumping of liquid materials is realized.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although terms such as the pump body 1, the pump cavity 10, the pump shaft 2, the eccentric disc 20, the shaft hole 200, the limit groove 201, the first pump shaft member 21, the second pump shaft member 22, the third pump shaft member 23, the fourth pump shaft member 24, the annular groove 25, the spacer shaft 26, the end shaft 27, the arc-shaped portion 28, the motor 3, the plunger assembly 4, the annular sleeve 41, the plunger rod 42, the pump head 5, the diaphragm 6, the quick release mechanism 7, the connecting shaft 70, the limit strip 701, the shaft cap 71, the pressing device 72, the rotating shaft 721, the rotating pressing portion 722 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and should not be interpreted as imposing any additional limitations that are contrary to the spirit of the present invention.

Claims

1. The utility model provides a three plunger diaphragm pumps for rubber production, is including pump body (1) that has pump chamber (10), axial is provided with pump shaft (2) in pump chamber (10), and pump shaft (2) are connected with motor (3), and the one end of plunger subassembly (4) is eccentric to be cup jointed on pump shaft (2), and diaphragm (6), its characterized in that of setting on pump head (5) are connected to the other end: the pump shaft (2) comprises a first pump shaft piece (21), a second pump shaft piece (22), a third pump shaft piece (23) and a fourth pump shaft piece (24) which are axially sleeved with each other and connected through a quick-release mechanism (7), wherein the end parts of the first pump shaft piece (21), the second pump shaft piece (22) and the third pump shaft piece (23) are respectively provided with an eccentric disc (20), the plunger assemblies (4) are three, one ends of the three plunger assemblies (4) are respectively sleeved on the three eccentric discs (20), and the other ends of the three plunger assemblies are respectively connected and arranged on the three diaphragms (6).

2. A three plunger diaphragm pump for rubber production according to claim 1 wherein: the quick-release mechanism (7) comprises a connecting shaft (70) fixedly sleeved in the pump shaft (2), one end of the connecting shaft (70) is in threaded connection with a shaft cap (71), and the other end of the connecting shaft (70) is rotatably connected with a pressing device (72).

3. A three plunger diaphragm pump for rubber production according to claim 2 wherein: one end of the connecting shaft (70) is perpendicular to the axial through hole, and the pressing device (72) comprises a rotating shaft (721) arranged in the through hole of the connecting shaft (70) and a rotating pressing part (722) fixed on the rotating shaft (721).

4. A three plunger diaphragm pump for rubber production according to claim 3 wherein: the rotating pressing part (722) comprises an eccentric pressing wheel eccentrically connected to the rotating shaft (721) and a pressing rod connected to the eccentric pressing wheel.

5. A three plunger diaphragm pump for rubber production according to claim 2 wherein: the pump is characterized in that a limit strip (701) extending along the axial direction is arranged on the peripheral side of the connecting shaft (70), the first pump shaft piece (21), the second pump shaft piece (22), the third pump shaft piece (23) and the fourth pump shaft piece (24) are matched with the connecting shaft (70) through a shaft hole (200) with a limit groove (201), and the limit groove (201) is matched with the limit strip (701) to form circumferential fixation.

6. A three plunger diaphragm pump for rubber production according to claim 1 wherein: a plurality of annular grooves (25) are formed in the circumferential direction of each eccentric disc (20).

7. A three plunger diaphragm pump for rubber production according to claim 1 wherein: the pump comprises a first pump shaft piece (21), a second pump shaft piece (22) and a third pump shaft piece (23) which respectively comprise an eccentric disc (20) and a spacing shaft (26), a fourth pump shaft piece (24) comprises an end shaft (27), the axes of the spacing shafts (26) and the end shaft (27) are overlapped, the distance from the far center end of the eccentric disc (20) to the axis is greater than the distance from the outer wall of the spacing shaft (26) to the axis of the pump shaft (2), the distance from the near center end of the eccentric disc (20) to the axis is less than the distance from the outer wall of the spacing shaft (26) to the axis of the pump shaft (2), and when the first pump shaft piece (21), the second pump shaft piece (22) and the third pump shaft piece (23) are axially connected, the included angles of which are 120 degrees are respectively formed between the centers of the three eccentric discs (20) and the perpendicular line of the axis of the pump shaft (2).

8. A three plunger diaphragm pump for rubber production according to claim 4 wherein: one end of the pump shaft (2) is provided with an arc-shaped part (28), and the arc-shaped part (28) is matched with the eccentric pressing wheel.

9. A three plunger diaphragm pump for rubber production according to claim 8 wherein: the arc-shaped part (28) is made of silica gel.

10. A three plunger diaphragm pump for rubber production according to claim 6 wherein: the plunger assembly (4) comprises annular sleeves (41) and plunger rods (42) hinged to one ends of the annular sleeves (41), the three annular sleeves (41) are in clearance fit with the three eccentric discs (20) respectively, and each annular sleeve (41) covers a plurality of annular grooves (25) in the corresponding eccentric disc (20).