CN104500406A - Coating pump - Google Patents

Abstract

The invention discloses a paint pump, which belongs to the technical field of fluid pumps. It comprises a pump body. One end of the pump body is provided with a feed port, and the other end is provided with a vortex-shaped vortex channel. The pump body is provided with a partition wall close to the feed port. The pump body between the partition wall and the plunger is provided with a mounting cylinder, a transmission shaft is installed on the installation cylinder, and a rotating disk is fixedly installed on the transmission shaft. A pressure balance cavity is formed between the rotating disk and the bottom of the installation cylinder. The installation space There is a floating disc in the cavity, the first impeller is fixedly installed on the transmission shaft, a circulation gap is formed between the floating disc and the rotating disc, and a number of through holes corresponding to the position of the circulation gap are provided on the installation cylinder; the fixed installation on the transmission shaft is useful In the second impeller which guides the fluid into the vortex channel, the end of the vortex channel is provided with a discharge port, and the pump body is provided with a connecting pipe connecting the pressure source and the pressure balance chamber. The invention solves the technical problems of insufficient suction volume and low output efficiency of current paint pumps, and is widely used in continuous fluid transportation.

Description

a paint pump

technical field

The invention relates to a pump, more particularly to a paint pump, and belongs to the technical field of fluid pumps.

Background technique

The paint pump is a fluid material conveying device, especially suitable for conveying materials that cannot be damaged, such as oranges, cosmetics containing active agents, blood preparations, biopharmaceuticals, preparations, sucrose containing additives, maltose, etc.

In terms of types, paint pumps are mainly divided into plunger pumps and rotor pumps. Among them, rotor pumps are widely used because they are not easy to clog during delivery.

However, in the field of painting and spraying, there are strict requirements on the particle size of the output fluid materials, and the output of excessively large particle materials is not allowed to affect the spraying effect. In order to solve this problem, the existing treatment measures are to add filter equipment to the pipeline for conveying materials, but the increase of filter equipment often affects the flow rate of material delivery, especially after a period of use of filter equipment, it will cause blockage, resulting in paint The suction volume of the pump is insufficient, which affects the output efficiency.

Therefore, for developing a new paint pump, changing the traditional structural form not only has urgent research value, but also has good economic benefits and industrial application potential. This is the motivation and foundation for the present invention to be completed.

Contents of the invention

In order to overcome the defects of the existing paint pumps pointed out above, the present inventor has conducted in-depth research on this, and after paying a lot of creative work, thus completed the present invention.

Specifically, the technical problem to be solved by the present invention is to provide a paint pump to solve the technical problems of insufficient suction volume, low output particle size requirement and low output efficiency of the current paint pump.

In order to solve the above technical problems, the technical solution of the present invention is to provide a paint pump, the paint pump includes a pump body, one end of the pump body is provided with a feed port, and the other end is provided with a vortex-shaped vortex channel, so A partition wall is provided in the pump body close to the feed inlet, and an installation cylinder is provided in the pump body between the partition wall and the plunger, and a closed installation cavity is formed between the installation cylinder and the partition wall. A transmission shaft is rotatably installed on the installation cylinder, and the transmission shaft runs through the installation cavity. One end of the transmission shaft passes through the installation cylinder, and the other end passes through the partition wall. A rotating disk is fixedly installed on the transmission shaft, and a pressure balance cavity is formed between the rotating disk and the bottom of the installation cylinder, and a floating disk is arranged in the installation cavity between the partition wall and the rotating disk. A pressure plate is provided between the floating plate and the partition wall, and the pressure plate is provided with adjusting studs, and the adjusting studs pass through the partition wall and are threadedly connected with the partition wall, and the pressure plate and the floating A number of compression springs are arranged between the disks. Under the action of the compression springs, the floating disk is pressed against the end surface of the rotating disk, and a first impeller is fixedly installed on the transmission shaft, and the first impeller passes through the The floating disk and the partition wall, the annular array on the first impeller has a number of radially arranged blades, and a feed channel is formed between two adjacent blades, and the feed channel communicates with the feed port , a flow gap is formed between the floating disk and the rotating disk, and a number of through holes corresponding to the position of the flow gap are provided on the installation cylinder, and the through holes are connected to the feed channel through the flow gap Pass; the cross-sectional area of the vortex channel gradually increases outward from the vortex center, the transmission shaft is coaxially arranged with the vortex center of the vortex channel, and the transmission shaft is fixedly installed for introducing fluid into the The second impeller of the vortex channel, the second impeller is provided with several helical blades, the radius of gyration of the helical blades near the entrance of the vortex channel is greater than the radius of gyration of the helical blades away from the entrance of the vortex channel , the end of the vortex channel is provided with a discharge port, the pump body is provided with a connecting pipe connected to a pressure source, and the connecting pipe communicates with the pressure balance chamber.

In the paint pump of the present invention, as an improvement, the pump body is provided with an end cover, the vortex channel is located between the pump body and the end cover, and the transmission shaft passes through the end cover .

In the paint pump of the present invention, as a further improvement, a taper sleeve is fixedly installed on the transmission shaft, and a first sealing member is provided between the taper sleeve and the end cover, and the end cover and the pump A second seal is provided between the bodies.

In the paint pump of the present invention, as a further improvement, a blocking plate is provided on the top of the first impeller, and the ends of all the blades are against the blocking plate.

In the paint pump of the present invention, as a further improvement, an annular protrusion is provided on the edge of the blocking plate, and all the vanes are restrained and installed in the annular protrusion.

In the paint pump of the present invention, as a further improvement, the pump body is provided with a backwashing interface, and the backwashing interface is arranged near the through hole.

In the paint pump of the present invention, as a further improvement, a slag discharge port is provided on the pump body, and the slag discharge port is located between the partition wall and the floating plate. the

In the paint pump of the present invention, as an improvement, a first pressure gauge is provided on the pump body close to the feed inlet, a second pressure gauge is provided on the connecting pipe, and the connecting pipe is connected to A pressure regulating valve.

After adopting the above-mentioned technical scheme, the paint pump of the present invention has achieved many beneficial effects, such as:

(1) Since there are several through holes distributed in the circumferential array of the installation cylinder, the feeding area is greatly increased, thereby greatly increasing the suction volume of the paint pump; due to the flow gap formed between the floating disc and the rotating disc, the output material is strictly controlled The size of the particle size, and the size of the circulation gap can be adjusted by the pre-tightening force of the compression spring, which reduces the output of large particle materials and satisfies the smooth circulation of different materials, and using this structure for feeding, the second impeller rotates and discharges At the same time, a negative pressure is formed in the impeller cavity of the paint pump, which further increases the suction volume of the paint pump. The setting of the vortex channel makes the fluid material discharged in time without generating back pressure on the second impeller, which greatly improves the output efficiency of the material. ; The performance of this structure is more reliable, suitable for maintenance-free continuous operation.

(2) Since there is an annular protrusion on the edge of the blocking plate, all the blades are restrained and installed in the annular protrusion, which effectively prevents the blades from detaching from the impeller under the action of centrifugal force, increases the structural strength of the first impeller, and improves the use of the impeller life.

(3) Since the pump body is equipped with a counter-current flushing interface, when cleaning is required, the counter-current flushing interface can be connected to compressed air or a pressurized water source, and at the same time reversely rotate the drive shaft, the reverse rotation of the second impeller will form a positive flow in the impeller chamber. It is easy to use, especially suitable for the maintenance of long-term continuous operation of the paint pump, and can realize online cleaning, thereby improving the conveying efficiency.

(4) Since there is a slag outlet between the partition wall and the floating plate, the large particle material separated under the action of centrifugal force can be smoothly discharged from the paint pump.

(5) Since the vortex channel is located between the pump body and the end cover, one end surface of the end cover forms a cavity wall of the vortex channel, while the main part of the vortex channel is located on the pump body and forms an open channel wall. The design of the structure greatly simplifies the manufacturing process of the vortex channel, which can be completed by using traditional sand casting, thereby reducing the production cost of the paint pump.

(6) Since the pressure balance chamber is connected to the pressure source, the pressure in the pressure balance chamber can be adjusted to make the pressure in the pressure balance chamber equal to the feed pressure, which can prevent the fluid material from entering the pressure balance chamber and overcome the pressure of the material in the pressure balance chamber. Defects that are difficult to remove.

As mentioned above, the present invention provides a paint pump, which can be widely used in many technical fields due to its various excellent properties, and has good application prospects and industrialization potential.

Description of drawings

Fig. 1 is the structural representation of the paint pump described in the embodiment of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of a vortex channel in a paint pump according to an embodiment of the present invention;

Fig. 3 is the sectional enlarged view of A-A in Fig. 1;

Fig. 4 is a schematic structural diagram of another paint pump in the embodiment of the present invention.

Wherein, in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , each numeral signifies the following specific meanings, elements and/or parts respectively.

In the figure: 1. Upper pump body, 2. Pressure plate, 3. Compression spring, 4. Discharge port, 5. End cover, 6. Through hole, 7. Vortex channel, 8. Countercurrent flushing interface, 9. Lower pump body, 10, impeller cavity, 11, second impeller, 12, transmission shaft, 13, spiral blade, 14, taper sleeve, 15, conical sealing surface, 16, cylindrical guide surface, 17, first seal, 18 , second seal, 19, rotating disc, 20, annular groove, 21, circulation gap, 22, floating disc, 23, installation cylinder, 24, slag discharge port, 25, partition wall, 26, adjusting stud, 27 , the first impeller, 2701, blocking plate, 2702, wheel sleeve, 2703, blade, 2704, annular protrusion, 28, feed inlet, 29, feed channel, 30, pressure balance chamber, 31, connecting pipe, 32, The first pressure gauge, 33, the second pressure gauge, 34, the pressure regulating valve.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. However, the uses and purposes of these exemplary embodiments are only used to illustrate the present invention, and do not constitute any form of limitation to the actual protection scope of the present invention, nor limit the protection scope of the present invention thereto.

As shown in Fig. 1, Fig. 2 and Fig. 3 together, the present invention provides a paint pump, comprising a pump body, the pump body is a straight cylindrical structure, one end of the pump body is provided with a feed port 28, and the other end is provided with a scroll Shaped vortex channel 7, the pump body is provided with a partition wall 25 close to the feed port 28, and the pump body between the partition wall 25 and the plunger 11 is provided with an installation cylinder 23, and a closed gap is formed between the installation cylinder 23 and the partition wall 25. The installation cavity is installed with a transmission shaft 12 rotating on the installation cylinder 23. The transmission shaft 12 runs through the installation cavity. One end of the transmission shaft 12 passes through the installation cylinder 23, and the other end passes through the partition wall 25. The transmission shaft 12 located in the installation cavity A rotating disk 19 is fixedly installed on the top, and a pressure balance chamber 30 is formed between the rotating disk 19 and the bottom of the installation cylinder 23. The rotating disk 19 is provided with several annular grooves 20 with the center of the rotating disk 19 as the center of the circle. The annular grooves 20 The function is to accommodate some impurities and prevent impurities from passing through the circulation gap 21. A floating plate 22 is arranged between the partition wall 25 and the rotating plate 19 in the installation cavity, and a pressure plate 2 is arranged between the floating plate 22 and the partition wall 25. Plate 2 is provided with adjustment stud 26, and adjustment stud 26 passes through partition wall 25 and is threadedly connected with partition wall 25, is provided with several compression springs 3 between pressure plate 2 and floating plate 22, under the action of compression spring 3, floating The disk 22 is in contact with the end face of the rotating disk 19. When large particles pass through, the compression spring 3 will be compressed, and the large particles will be accommodated in the annular groove 20. At this time, the compression spring 3 will return to its position and continue to maintain the original circulation gap. 21, and the large particles in the annular groove 20 are difficult to enter the flow gap 21 again, and a first impeller 27 is fixedly installed on the transmission shaft 12, and the first impeller 27 passes through the floating disc 22 and the partition wall 25, and the first impeller 27 There are several blades 2703 radially arranged in the upper annular array, and a feed channel 29 is formed between two adjacent blades 2703, and the feed channel 29 communicates with the feed port 28, and a flow gap 21 is formed between the floating disc 22 and the rotating disc 19. , the mounting cylinder 23 is provided with a number of through holes 6 corresponding to the position of the flow gap 21, the through holes 6 communicate with the feed channel 29 through the flow gap 21, and under the action of the first impeller 27, it is difficult for large particle materials to enter In the feed channel 29, a barrier is played at the feed port 28; the cross-sectional area of the vortex channel 7 gradually becomes larger from the center of the vortex, and the drive shaft is coaxially arranged with the vortex center of the vortex channel 7. A second impeller 11 for introducing fluid into the vortex channel 7 is fixedly installed, and an impeller cavity 10 is formed between the installation cylinder 23 and the vortex channel 7. The second impeller 11 is provided with several spiral blades 13, and the second impeller 11 is located in the impeller cavity 10. The lower end of the spiral blade 13 is close to the entrance of the vortex passage 7. When the transmission shaft 12 rotates forward, the spiral blade 13 will guide the material into the vortex passage 7, and a negative pressure is formed in the impeller chamber 10. When the transmission shaft 12 rotates in the reverse direction , high pressure is formed in the impeller chamber 10. As for the shape and direction of rotation of the helical blade 13, those skilled in the art can set it according to the forward and reverse directions of the transmission shaft 12. 1 The radius of gyration of 3 is greater than the radius of gyration of the helical blade 13 far away from the entrance of the vortex channel 7. The end of the vortex channel 7 is provided with a discharge port 4, and the pump body is provided with a connecting pipe 31 connected to a pressure source. The connecting pipe 31 communicates with the pressure balance. Cavity 30 and pressure source, the pressure source is usually a pressure water source or a compressed air source or other fluid medium with pressure, the compressed air source will cause the material to contain air bubbles, resulting in unstable output fluid, so the pressure water source is preferred.

The pump body is provided with an end cover 5, the vortex channel 7 is located between the pump body and the end cover 5, the transmission shaft 12 passes through the end cover 5, an end surface of the end cover 5 forms a cavity wall of the vortex channel 7, and the vortex channel 7 The main part of the pump body is located on the pump body and forms an open channel wall, so that the pump body and the end cover 5 jointly form the vortex channel 7, which simplifies the manufacturing process of the vortex channel 7. Specifically, a taper sleeve 14 is fixedly installed on the transmission shaft 12, and the taper sleeve 14 forms an interference fit with the transmission shaft 12. The taper sleeve 14 has a tapered sealing surface 15 and a cylindrical guide surface 16. Correspondingly, the end A structure matching the shape of the taper sleeve 14 is also formed on the cover 5. A first seal 17 is arranged between the taper sleeve 14 and the end cover 5. The first seal 17 is arranged on the cylindrical guide surface 16. The end cover 5 There is a second seal 18 between the pump body and the second seal will be used to seal the vortex channel 7 to prevent the vortex channel 7 from leaking. Here, both the first sealing member 17 and the second sealing member 18 are preferably O-rings.

The first impeller 27 includes a wheel sleeve 2702 that is sleeved on the transmission shaft 12, and the wheel sleeve 2702 is connected to the transmission shaft 12 through a key transmission. The top of the first impeller 27 is provided with a blocking plate 2701, and the blocking plate 2701 is located on the wheel sleeve 2702. The ends of all the blades 2703 are against the blocking plate 2701, and the edge of the blocking plate 2701 is provided with an annular protrusion 2704, and all the blades 2703 are constrained to be installed in the annular protrusion 2704. The inventor made the first For the impeller 27, in order to ensure its dynamic balance, a number of slots with the same thickness as the blade 2703 are processed on the wheel sleeve 2702, and a number of slots with the same number and width are also processed at the corresponding positions on the blocking plate 2701, and the blade 2703 is inserted into the slot. In the groove and slot (refer to FIG. 3 ), the blade 2703 is fixed between the blocking plate 2701 and the wheel sleeve 2702 by spot welding. When the first impeller 27 is checked for dynamic balance, it uses weighting method to correct, adding solder joints at the position where the weight is missing, which can not only ensure the firmness of the blade 2703, but also ensure its dynamic balance.

The pump body is provided with a counter-current flushing interface 8, which is set close to the through hole 6. When cleaning is required, the counter-current flushing interface 8 can be connected to compressed air or a pressurized water source, and the paint pump can be sucked and discharged in the opposite direction. It is easy to use, especially suitable for the maintenance of paint pumps that work continuously for a long time.

A slag discharge port 24 is provided on the pump body, and the slag discharge port 24 is located between the partition wall 25 and the floating plate 22. During normal operation, the slag discharge port 24 is blocked with a plug. , expand the distance between the floating disc 22 and the rotating disc 19 in the flow gap 21, reversely rotate the transmission shaft 12, so that the second impeller 11 reversely rotates, a high pressure is formed in the impeller cavity 10, and the materials and impurities in the impeller cavity 10 are To discharge, open the slag discharge port 24, and discharge the impurities between the partition wall 25 and the floating plate 22.

In the specific practice process, the inventor divided the pump body into an upper pump body 1 and a lower pump body 9, the feed inlet 28 is located on the upper pump body 1, the end cover 5 is installed on the lower pump body 9, and the vortex channel 7 is located on the upper pump body 9. Between the lower pump body 9 and the end cover 5, the installation cylinder 23 is installed between the upper pump body 1 and the lower pump body 9. During installation, the installation cylinder 23 is first assembled, and the transmission shaft 12, the rotating disc 19, the floating disc 22, The pressure plate 2 and the first impeller 27 are installed and connected to the installation cylinder 23 in sequence, and then connected to the pump body 1, and then the second impeller 11 is installed on the transmission shaft 23, the end cover 5 is blocked, and the taper sleeve 14 is assembled. Easy to install and maintain.

A first pressure gauge 32 is provided on the pump body close to the feed port 28. Specifically, the first pressure gauge 32 is installed on the upper pump body 1 to detect the feed pressure, and the connecting pipe 31 is provided with a second pressure gauge. 33. The second pressure gauge 33 is used to detect the pressure in the pressure balance chamber 30. The connecting pipe 31 is connected to the pressure regulating valve 34. Through the data of the first pressure gauge 32 and the second pressure gauge 33, the pressure regulating valve 34 is adjusted so that the pressure The pressure in the balance chamber 30 is equivalent to the feed pressure, which can prevent fluid materials from entering the pressure balance chamber 30 and overcome the defect that the materials in the pressure balance chamber 30 are difficult to remove. As shown in Figure 4, as a more optimized solution, use the pipeline 35 to connect the pressure regulating valve 34 to the vortex channel 7, the connection end is close to the position of the discharge port 4, and directly use part of the discharged fluid material as a pressure source, both The cleanliness in the pressure balance chamber 30 can be guaranteed, and the concentration of the material can be ensured, avoiding secondary pollution of the material by other media.

Its working process is as follows:

The material enters the upper pump body 1 from the feed port 28, the second impeller 11 continuously rotates, sucks and discharges the material, and the centrifugal force of the first impeller 27 first screens the material at the feed port 28, and the large particle material is discharged from the feed port 28. A small amount of large particles entering the feed channel 29 are continuously thrown towards the inner wall of the installation cylinder 23 by the centrifugal force during the rotation of the blade 2703, and finally the fluid passing through the circulation gap 21 has small particle size and less impurities, which ensures the quality of the discharged material. The mechanism has a large suction capacity and is especially suitable for the environment of continuous operation. It does not require frequent maintenance and has high efficiency.

It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and/or variations to the present invention, and all these equivalent forms also fall within the appended claims of the present application. within the defined scope of protection.

Claims (8)

1. A paint pump, comprising a pump body, characterized in that: one end of the pump body is provided with a feed inlet, and the other end is provided with a vortex-shaped vortex channel, and a partition is provided near the feed inlet in the pump body wall, the pump body between the partition wall and the plunger is provided with an installation cylinder, a closed installation cavity is formed between the installation cylinder and the partition wall, and a transmission shaft is rotatably installed on the installation cylinder. The transmission shaft runs through the installation cavity, one end of the transmission shaft passes through the installation cylinder, and the other end passes through the partition wall, and a rotating disk is fixedly installed on the transmission shaft in the installation cavity, so A pressure balance chamber is formed between the rotating disk and the bottom of the installation cylinder, a floating disk is arranged between the partition wall and the rotating disk in the installation cavity, and a pressure balance chamber is arranged between the floating disk and the partition wall. plate, the pressure plate is provided with adjustment studs, and the adjustment studs pass through the partition wall and are threadedly connected with the partition wall, a number of compression springs are arranged between the pressure plate and the floating plate, and the Under the action of the compression spring, the floating disk is against the end surface of the rotating disk, and the first impeller is fixedly installed on the transmission shaft, and the first impeller passes through the floating disk and the partition wall, and the first impeller The circular array on the impeller has a number of radially arranged blades, a feed channel is formed between two adjacent blades, the feed channel communicates with the feed port, and a communication flow is formed between the floating disc and the rotating disc. The installation cylinder is provided with a number of through holes corresponding to the position of the flow gap, and the through holes communicate with the feed channel through the flow gap; the cross-sectional area of the vortex channel is determined by the vortex The center gradually becomes larger outward, and the transmission shaft is arranged coaxially with the vortex center of the vortex passage, and the second impeller for introducing fluid into the vortex passage is fixedly installed on the transmission shaft, and the second impeller There are several helical blades, the radius of gyration of the helical blades close to the entrance of the vortex channel is greater than the radius of gyration of the helical blades away from the entrance of the vortex channel, and the end of the vortex channel is provided with a discharge port , the pump body is provided with a connecting pipe connected to a pressure source, and the connecting pipe communicates with the pressure balance chamber. 2. The paint pump according to claim 1, characterized in that: the pump body is provided with an end cover, the vortex channel is located between the pump body and the end cover, and the transmission shaft passes through the end cover. build. 3. The paint pump according to claim 1 or 2, characterized in that: a taper sleeve is fixedly installed on the transmission shaft, a first sealing member is provided between the taper sleeve and the end cover, and the end cover A second seal is provided between the cover and the pump body. 4. The paint pump according to any one of claims 1-3, characterized in that: a blocking plate is provided on the top of the first impeller, and ends of all the blades are against the blocking plate. 5 . The paint pump according to claim 4 , wherein an annular protrusion is provided on the edge of the blocking plate, and all the vanes are constrained to be installed in the annular protrusion. 6 . 6. The paint pump according to any one of claims 1-5, characterized in that: the pump body is provided with a backwashing interface, and the backwashing interface is arranged close to the through hole. 7. The paint pump according to any one of claims 1-6, characterized in that: the pump body is provided with a slag discharge port, and the slag discharge port is located between the partition wall and the floating plate. 8. The paint pump according to any one of claims 1-7, characterized in that: the pump body is provided with a first pressure gauge near the feed inlet, and the connecting pipe is provided with a second pressure gauge , the connecting pipe is connected to the pressure regulating valve.