CN220059824U - Continuous piston pump capable of discharging and automatically compensating pressure - Google Patents

Abstract

The utility model discloses a continuous piston pump capable of automatically compensating pressure during discharging, which comprises two pump bodies, wherein a feeding seat and a discharging seat are communicated between the two pump bodies, feeding valves are arranged at the positions where the two ends of the feeding seat are communicated with the pump bodies, discharging valves are arranged at the positions where the two ends of the discharging seat are communicated with the pump bodies, and a piston compensation mechanism and a first pressure sensor are also arranged on the discharging seat; the two feeding valves can respectively control feeding into the two pump bodies, the two discharging valves can unidirectionally pass through materials and enter the discharging seat, the first pressure sensor is used for monitoring discharging pressure in the discharging seat, and the piston compensation mechanism is suitable for adjusting compensation to balance the discharging pressure in the discharging seat when the two pump bodies switch pushing materials. The utility model has smaller size, can perform pressure compensation when the double pumps are switched, ensures the stability of discharge pressure, and further ensures the accuracy of discharge quantity.

Description

Continuous piston pump capable of discharging and automatically compensating pressure

Technical Field

The utility model relates to the technical field of piston pumps, in particular to a continuous piston pump with automatic pressure compensation in discharging.

Background

At present, when a double pump is switched, the continuous piston pump on the market can generate unstable pressure, and finally, the quantitative discharging is inaccurate. The existing continuous piston pump continuously discharges materials in a mode of connecting two unidirectional piston pumps in parallel, but when the two pumps are switched, the situation of unstable pressure or inaccurate quantitative discharge can be caused by the abrupt change of the internal volume; meanwhile, the existing double-pump parallel structure generally adopts two pipes of materials to feed respectively, occupies a space of a working site, and sometimes causes interference.

Disclosure of Invention

The utility model aims to solve the technical problems of overcoming the defects of the prior art and providing a continuous piston pump capable of automatically compensating pressure during discharging, which has smaller size, can compensate pressure during switching of double pumps, ensures the stability of discharging pressure and further ensures the accuracy of discharging quantity.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the continuous piston pump capable of realizing automatic pressure compensation in discharging comprises two pump bodies, wherein a feeding seat and a discharging seat are communicated between the two pump bodies, feeding valves are arranged at the positions where the two ends of the feeding seat are communicated with the pump bodies, discharging valves are arranged at the positions where the two ends of the discharging seat are communicated with the pump bodies, and a piston compensation mechanism and a first pressure sensor are further arranged on the discharging seat;

the two feeding valves can respectively control feeding into the two pump bodies, the two discharging valves can unidirectionally pass through materials and enter the discharging seat, the first pressure sensor is used for monitoring discharging pressure in the discharging seat, and the piston compensation mechanism is suitable for adjusting compensation to balance the discharging pressure in the discharging seat when the two pump bodies switch pushing materials.

Further, the feeding valve comprises a cylinder body arranged on the outer side of the pump body, a pneumatic rod movably connected in the cylinder body, a firing pin block arranged at one end of the pneumatic rod far away from the cylinder body, and a firing pin base and a firing pin sealing block which are arranged at the communication position of the feeding seat and the pump body;

the pneumatic rod penetrates through the pump body and is inserted into the firing pin base in a clearance manner, the firing pin block is matched with the firing pin sealing block, and the firing pin block and the firing pin sealing block can be in fit sealing to cut off feeding.

Further, the cylinder body is further provided with a first air pipe and a second air pipe in a communicating mode, and the first air pipe and the second air pipe can respectively ventilate and control the pneumatic rod to do telescopic motion.

Further, the end part of the cylinder block is also provided with a guide block mounting seat, a pneumatic rod guide block is arranged in the guide block mounting seat, and the pneumatic rod slides through the pneumatic rod guide block.

Further, the discharge valve is a one-way valve, and comprises a one-way valve mounting seat and a one-way valve sealing block which are arranged at the communication position of the discharge seat and the pump body, a spring arranged in the one-way valve mounting seat, and a one-way valve firing pin which is arranged at the inner end of the spring and is matched with the one-way valve sealing block;

when pushing materials, the pump body can push the check valve striker through pushing materials to enable the materials to enter the discharging seat.

Further, the piston compensation mechanism comprises an outer shell, a piston cylinder body, a compensation motor, a motor seat, a second coupler, a ball screw, a transmission sleeve body, a sleeve body guide ring and a piston push rod;

the piston cylinder body is communicated with the inside of the discharging seat, one end of the outer shell is connected with the piston cylinder body, the compensation motor is arranged at the other end of the outer shell through the motor seat, the output end of the compensation motor is connected with the ball screw through a second coupling, the sleeve body guide ring is arranged inside the outer shell, the transmission sleeve body is assembled on the ball screw and is in sliding clamping connection with the sleeve body guide ring, and the piston push rod is connected with the transmission sleeve body and is assembled in the piston cylinder body in a sliding manner.

Further, a feeding hole is formed in the feeding seat, and a discharging hole is formed in the discharging seat.

Further, the pump body comprises a servo motor, a speed reducer, a coupler, a motor mounting seat, a main shell, a screw rod, a transmission sheath, a sheath guide ring, a piston rod, a piston cavity, a guide flange plate and a piston rod guide sleeve;

one end of the piston cavity is communicated with the discharging seat, one end of the main shell is connected with the other end of the piston cavity through a guide flange, the servo motor is arranged at the other end of the main shell through a motor mounting seat, the output end of the servo motor is in transmission connection with a screw rod through a speed reducer and a coupling, the sheath guide ring is arranged inside the main shell, the transmission sheath is assembled on the screw rod and is in sliding clamping connection with the sheath guide ring, the piston rod is connected with the transmission sheath and is slidably assembled in the piston cavity, the piston rod guide sleeve is arranged at the position of the guide flange plate, which is opposite to the piston cavity, and the piston rod is slidably connected in the piston rod guide sleeve in a penetrating manner.

Further, a second pressure sensor for monitoring the internal pressure is provided on the piston chamber.

Further, one end of the transmission sheath, which is far away from the piston rod, is provided with a photoelectric baffle, and the inner wall of one end of the main shell, which is close to the servo motor, is provided with a groove-type photoelectric sensor corresponding to the photoelectric baffle.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. according to the utility model, the piston compensation mechanism and the first pressure sensor are designed on the discharge seat of the double pump, so that when the double pump performs pushing and switching, the piston compensation mechanism can be controlled to stretch and retract according to the feedback value of the first pressure sensor to perform pressure balance, the discharge pressure in the discharge seat is stabilized in a standard range, and the accuracy of the discharge quantity is further effectively ensured.

2. According to the utility model, the common feeding seat is designed between the two pump bodies, and the feeding valve is arranged at the communication position of each pump body and the feeding seat, so that the whole pump body can share one material pipeline, the whole size of the structure is greatly reduced, the occupied space is reduced, and the two feeding valves can be used for feeding respectively, so that the operation is simpler and more convenient.

Drawings

FIG. 1 is a schematic view of the overall cross-sectional structure of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of the feed valve of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of the discharge valve of the present utility model;

FIG. 4 is an enlarged schematic view of the piston compensating mechanism of the present utility model;

1, a pump body; 100. a servo motor; 101. a speed reducer; 102. a first coupling; 103. a motor mounting seat; 104. a main housing; 105. a screw rod; 106. a transmission sheath; 107. a sheath guide ring; 108. a piston rod; 109. a piston cavity; 110. a guide flange; 111. a piston rod guide sleeve; 2. a feeding seat; 20. a feed inlet; 3. a discharging seat; 30. a discharge port; 4. a feed valve; 40. a cylinder block; 41. a pneumatic lever; 42. a striker block; 43. a striker base; 44. a striker sealing block; 45. a first air tube; 46. a second air pipe; 47. a guide block mounting seat; 48. a pneumatic rod guide block; 5. a discharge valve; 50. a check valve mounting seat; 51. a check valve sealing block; 52. a check valve striker; 53. a spring; 6. a piston compensation mechanism; 60. an outer housing; 61. a piston cylinder; 62. a compensation motor; 63. a motor base; 64. a second coupling; 65. a ball screw; 66. a transmission sleeve body; 67. a sleeve guide ring; 68. a piston push rod; 7. a first pressure sensor; 8. a second pressure sensor; 91. a photoelectric baffle; 92. a trough type photoelectric sensor.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

As shown in fig. 1-4, in the present embodiment, a continuous piston pump capable of automatic pressure compensation in discharging is provided, which is mainly composed of two pump bodies 1, a feeding seat 2 and a discharging seat 3 are arranged between the two pump bodies 1 in a communicating manner, the feeding seat 2 is in a block shape, two ends of the feeding seat are communicated with the pump bodies 1, the section of the discharging seat 3 is in a right-angle U shape, and two ends of the discharging seat are communicated with the pump bodies 1. Each pump body 1 specifically comprises a servo motor 100, a speed reducer 101, a coupling 102, a motor mounting seat 103, a main shell 104, a screw rod 105, a transmission sheath 106, a sheath guide ring 107, a piston rod 108, a piston cavity 109, a guide flange 110, a piston rod guide sleeve 111 and other parts. Wherein, piston cavity 109 one end and discharge seat 3 intercommunication, main casing 104 one end is linked together with the piston cavity 109 other end through guiding flange 110, servo motor 100 passes through motor mount pad 103 and installs the other end at main casing 104, servo motor 100 output passes through speed reducer 101, shaft coupling 102 and lead screw 105 transmission connection, lead screw 105 passes through the bearing and rotates and install in main casing 104, sheath guide ring 107 fixes the middle part in main casing 104, self-contained lead screw nut on the lead screw 105, the transmission sheath 106 passes through the lead screw nut and assembles on lead screw 105 and with sheath guide ring 107 slip joint, the rotation of transmission sheath 106 can be restricted to the shape of sheath guide ring 107, piston rod 108 links to each other with transmission sheath 106 and slidable mounting in piston cavity 109, piston rod guide sleeve 111 installs in guiding flange 110 and piston cavity 109 junction, piston rod 108 slidable cross-connection is in piston rod guide sleeve 111. During operation, the screw rod 105 can be driven to rotate through the rotation of the servo motor 100, so that the transmission sheath 106 is driven to move in the main shell 104, and then the piston rod 108 is driven to move, so that materials in the piston cavity 109 can be pushed into the discharge seat 3, and the discharge seat 3 is provided with the discharge hole 30 for discharging.

The feeding seat 2 in this embodiment is used for feeding, on which a feeding port 20 is provided and can be directly connected with a feeding pipeline, two ends of the specific feeding seat 2 are communicated with the side wall of the piston cavity 109 of the pump body 1, and a feeding valve 4 is arranged at the communication position between the piston cavity 109 and the feeding seat 2, and the feeding valves 4 on two sides can respectively control on-off feeding into the piston cavities 109 on two sides. Therefore, the two pump bodies 1 can share one feeding seat 2, and the whole pump body can only share one material pipeline, so that the whole body type of the structure is greatly reduced, the occupied space is reduced, and the operation is simpler and more convenient.

Specifically, the feed valve 4 is composed of a cylinder body 40 arranged on the outer side of the pump body 1, a pneumatic rod 41 movably connected in the cylinder body 40, a firing pin block 42 arranged at one end, far away from the cylinder body 40, of the pneumatic rod 41, a firing pin base 43, a firing pin sealing block 44 and the like which are arranged at the position, where the feed seat 2 is communicated with the pump body 1, of the cylinder body, a guide block mounting seat 47 is further arranged at the end part of the cylinder body 40, a pneumatic rod guide block 48 is arranged in the guide block mounting seat 47, the pneumatic rod 41 slides through the pneumatic rod guide block 48 and passes through the side wall of a piston cavity 109 of the pump body 1 to be inserted in the firing pin base 43 in a clearance manner, the firing pin base 43 and the firing pin sealing block 44 are tightly fixed, the firing pin block 42 is matched with the firing pin sealing block 44, and feeding can be blocked when the firing pin block 42 is tightly adhered and sealed with the firing pin sealing block 44. Meanwhile, the cylinder body 40 is further provided with a first air pipe 45 and a second air pipe 46 in a communicating manner, the air rod 41 can be controlled to do telescopic motion through the first air pipe 45 and the second air pipe 46 in a ventilation mode, electromagnetic valves can be respectively arranged on the first air pipe 45 and the second air pipe 46 to conduct automatic control on-off according to the material quantity in the piston cavity 109, when the first air pipe 45 is ventilated, the firing pin block 42 and the firing pin sealing block 44 are tightly attached and sealed, feeding is not conducted at this time, when the second air pipe 46 is ventilated, the firing pin block 42 and the firing pin sealing block 44 are separated and opened, and feeding is conducted at this time.

During initial operation, two feed valves 4 can be opened together and feed is carried out, and when the material in the piston cavity 109 is full, the feed valves 4 can be closed to cut off the feed, and a second pressure sensor 8 can be additionally arranged on the piston cavity 109 so as to monitor the pressure in the piston cavity 109 and judge whether the material is full or pushed. When the pump body 1 discharges, only one of the pump bodies is required to work, after the material in the piston cavity 109 of one pump body 1 is pushed, the other pump body 1 starts to switch and push the material, the pump body 1 which pushes the material starts to reset, one end of the transmission sheath 106 of the pump body 1, which is far away from the piston rod 108, is provided with a photoelectric baffle 91, the inner wall of one end of the main shell 104, which is close to the servo motor 100, is provided with a groove-type photoelectric sensor 92 corresponding to the photoelectric baffle 91, the structure can be used for resetting the original point of the servo motor 100, the screw rod 105 and the piston rod 108 to work, and after resetting, the feeding valve 4 corresponding to the pump body 1 is opened to feed the material into the piston cavity 109 until the feeding is completed, and the continuous discharging work can be realized by circulating the working process.

It should be noted that, in order to prevent the backflow of the material and ensure the pushing work of the single pump, the two ends of the discharging seat 3 are all provided with discharging valves 5 at the communicating positions of the piston cavities 109 of the pump body 1, and the discharging valves 5 are one-way valves. The specific discharging valve 5 can be composed of a check valve mounting seat 50, a check valve sealing block 51, a check valve firing pin 52, a spring 53 and the like, wherein the check valve mounting seat 50 and the check valve sealing block 51 are arranged at the communication position of the discharging seat 3 and the piston cavity 109, the check valve mounting seat 50 and the check valve sealing block 51 are tightly fixed, the spring 53 is arranged inside the check valve mounting seat 50, and the check valve firing pin 52 is arranged at the inner end of the spring 53 and is matched with the check valve sealing block 51. The check valve striker 52 and the check valve sealing block 51 form a seal in the direction from the discharge seat 3 to the piston cavity 109, so that no feed back occurs, and when the material is pushed in the direction from the piston cavity 109 to the discharge seat 3, the check valve striker 52 can be pushed open by the pushing pressure to enable the material to enter the discharge seat 3.

When two pump bodies 1 are switching the double pump, the unstable condition of pressure can appear in the discharge seat 3, finally leads to quantitative discharging inaccurate. In this embodiment, therefore, a piston compensation mechanism 6 and a first pressure sensor 7 are also provided on the discharge seat 3. The first pressure sensor 7 is used for monitoring the discharge pressure in the discharge seat 3, and when the pressure in the discharge seat 3 does not exceed the standard range, the piston compensation mechanism 6 can be controlled to adjust the compensation to balance the discharge pressure in the discharge seat 3.

Specifically, the piston compensating mechanism 6 in the present embodiment is composed of an outer housing 60, a piston cylinder 61, a compensating motor 62, a motor mount 63, a second coupling 64, a ball screw 65, a transmission housing 66, a housing guide ring 67, a piston push rod 68, and the like. Wherein piston cylinder body 61 and ejection of compact seat 3 inside intercommunication, shell body 60 one end is connected with piston cylinder body 61, compensation motor 62 passes through motor cabinet 63 and installs at the shell body 60 other end, compensation motor 62 output passes through second shaft coupling 64 and ball 65 transmission connection, ball 65 passes through the bearing and rotates and install in shell body 60, cover body guide ring 67 is fixed at the middle part in shell body 60, the last self-contained screw nut of ball 65, the transmission cover body 66 passes through screw nut and assembles on ball screw 65 and with cover body guide ring 67 sliding joint, the shape of cover body guide ring 67 can restrict the rotation of transmission cover body 66, piston push rod 68 links to each other and sliding fit in piston cylinder body 61 with transmission cover body 66. When the double pumps are switched, if the first pressure sensor 7 monitors that the pressure in the discharge seat 3 is unstable, the piston compensation mechanism 6 can perform pressure compensation operation, the ball screw 65 can be driven to rotate through the rotation of the compensation motor 62, the transmission sleeve body 66 is further driven to move in the outer shell 60, the piston push rod 68 is driven to perform telescopic movement, and then the pressure compensation in the discharge seat 3 can be realized until the data monitored by the first pressure sensor 7 is recovered to a standard range, so that the accuracy of the discharge amount can be effectively ensured. Of course, the piston compensation mechanism 6 need not necessarily employ a lead screw piston drive for compensation, and may employ gear, plunger, screw, etc. arrangements in other embodiments.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The technical problems, technical solutions and beneficial effects that the present utility model solves are further described in detail in the above specific embodiments, it should be understood that the above description is only specific embodiments of the present utility model and is not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principles of the present utility model should be included in the scope of protection of the present utility model.

Claims (10)

1. A continuous piston pump capable of automatic pressure compensation for discharging, which is characterized in that: the automatic feeding device comprises two pump bodies (1), wherein a feeding seat (2) and a discharging seat (3) are communicated between the two pump bodies (1), feeding valves (4) are arranged at the communication positions of the two ends of the feeding seat (2) and the pump bodies (1), discharging valves (5) are arranged at the communication positions of the two ends of the discharging seat (3) and the pump bodies (1), and a piston compensation mechanism (6) and a first pressure sensor (7) are further arranged on the discharging seat (3);

the two feeding valves (4) can respectively control feeding into the two pump bodies (1), the two discharging valves (5) can unidirectionally pass through materials and enter the discharging seat (3), the first pressure sensor (7) is used for monitoring discharging pressure in the discharging seat (3), and the piston compensation mechanism (6) is suitable for adjusting compensation to balance the discharging pressure in the discharging seat (3) when the two pump bodies (1) switch pushing materials.

2. A continuous piston pump with automatic pressure compensation for discharge according to claim 1, characterized in that: the feeding valve (4) comprises a cylinder body (40) arranged on the outer side of the pump body (1), a pneumatic rod (41) movably connected in the cylinder body (40), a firing pin block (42) arranged at one end of the pneumatic rod (41) far away from the cylinder body (40), and a firing pin base (43) and a firing pin sealing block (44) arranged at the communication position of the feeding seat (2) and the pump body (1);

the pneumatic rod (41) penetrates through the pump body (1) and is inserted into the firing pin base (43) in a clearance manner, the firing pin block (42) is matched with the firing pin sealing block (44), and the firing pin block (42) and the firing pin sealing block (44) can be in fit and seal to block feeding.

3. A continuous piston pump with automatic pressure compensation for discharge according to claim 2, characterized in that: the cylinder body (40) is also communicated with a first air pipe (45) and a second air pipe (46), and the first air pipe (45) and the second air pipe (46) can respectively ventilate and control the pneumatic rod (41) to do telescopic movement.

4. A continuous piston pump with automatic pressure compensation for discharge according to claim 2, characterized in that: the end part of the cylinder body (40) is also provided with a guide block mounting seat (47), a pneumatic rod guide block (48) is arranged in the guide block mounting seat (47), and the pneumatic rod (41) slides through the pneumatic rod guide block (48).

5. A continuous piston pump with automatic pressure compensation for discharge according to claim 1, characterized in that: the discharge valve (5) is a one-way valve, the discharge valve (5) comprises a one-way valve mounting seat (50) and a one-way valve sealing block (51) which are arranged at the communication position of the discharge seat (3) and the pump body (1), a spring (53) arranged in the one-way valve mounting seat (50), and a one-way valve firing pin (52) which is arranged at the inner end of the spring (53) and is matched with the one-way valve sealing block (51);

when pushing materials, the pump body (1) can push the check valve firing pin (52) through pushing materials under pressure so that materials can enter the discharging seat (3).

6. A continuous piston pump with automatic pressure compensation for discharge according to claim 1, characterized in that: the piston compensation mechanism (6) comprises an outer shell (60), a piston cylinder (61), a compensation motor (62), a motor base (63), a second coupler (64), a ball screw (65), a transmission sleeve (66), a sleeve guide ring (67) and a piston push rod (68);

the piston cylinder body (61) is communicated with the inside of the discharging seat (3), one end of the outer shell (60) is connected with the piston cylinder body (61), the compensation motor (62) is installed at the other end of the outer shell (60) through the motor seat (63), the output end of the compensation motor (62) is in transmission connection with the ball screw (65) through the second coupling (64), the sleeve body guide ring (67) is arranged inside the outer shell (60), the transmission sleeve body (66) is assembled on the ball screw (65) and is in sliding clamping connection with the sleeve body guide ring (67), and the piston push rod (68) is connected with the transmission sleeve body (66) and is in sliding assembly in the piston cylinder body (61).

7. A continuous piston pump with automatic pressure compensation for discharge according to claim 1, characterized in that: the feeding seat (2) is provided with a feeding hole (20), and the discharging seat (3) is provided with a discharging hole (30).

8. A continuous piston pump with automatic pressure compensation for discharge according to claim 1, characterized in that: the pump body (1) comprises a servo motor (100), a speed reducer (101), a coupler (102), a motor mounting seat (103), a main shell (104), a screw rod (105), a transmission sheath (106), a sheath guide ring (107), a piston rod (108), a piston cavity (109), a guide flange plate (110) and a piston rod guide sleeve (111);

the utility model discloses a piston cavity, including main casing (104), piston cavity (109), guide flange (110), servo motor (100), shaft coupling (102), screw rod (105) transmission connection, sheath guide ring (107) set up inside main casing (104), transmission sheath (106) assemble on screw rod (105) and with sheath guide ring (107) slip joint, piston rod (108) link to each other and slidable assembly is in piston cavity (109) with the guide flange (110), piston rod guide sleeve (111) set up in guide flange (110) and piston cavity (109) junction, piston rod (108) slip joint is in piston rod guide sleeve (111).

9. A continuous piston pump with automatic pressure compensation for discharge according to claim 8, characterized in that: a second pressure sensor (8) for monitoring the internal pressure is arranged on the piston cavity (109).

10. A continuous piston pump with automatic pressure compensation for discharge according to claim 8, characterized in that: one end of the transmission sheath (106) far away from the piston rod (108) is provided with a photoelectric baffle (91), and the inner wall of one end of the main shell (104) close to the servo motor (100) is provided with a groove-type photoelectric sensor (92) corresponding to the photoelectric baffle (91).