A peristaltic pump head with an elastic pressing block capable of outputting high pressure

Abstract

The present invention discloses a peristaltic pump head with an elastic pressing block capable of outputting high pressure, belonging to the technical field of peristaltic pumps. It includes an elastic pipe pressing device, an opening and closing device, a rear support plate, a hose extrusion device, a lower bracket, a hose fixing device, positioning columns, a mounting plate and a motor; the opening and closing device passes above the elastic pipe pressing device, the elastic pipe pressing device is arranged above the hose extrusion device, the hose extrusion device is arranged above the lower bracket, the lower bracket is arranged on one side of the rear support plate, the rear support plate is arranged on one side of the mounting plate, the motor is arranged on the side of the mounting plate away from the rear support plate, and the output end of the motor is connected to the hose extrusion device. The hose fixing devices are symmetrically arranged on both sides of the lower bracket, and the elastic pipe pressing device is connected to the rear support plate through a self-lubricating locking block. The peristaltic pump head with an elastic pressing block capable of outputting high pressure provided by the present invention has an elastic hose that is easy to install and can output high pressure.

Description

Technical Field

[0001] The present invention belongs to the technical field of peristaltic pumps, and in particular relates to a peristaltic pump head with an elastic pressing block capable of outputting high pressure. Background Art

[0002] A peristaltic pump is used for liquid transmission and outputs a certain outlet pressure. An elastic hose is placed between the rotor and the fixed pressing block. By continuously pressing and releasing the elastic hose through the rotation of the rotor, the purpose of transmitting liquid and outputting a certain outlet pressure is achieved. Along with the continuous expansion of the application fields of peristaltic pump products, the market's demand for its transmission flow rate and pressure is becoming more and more refined, and the adjustable precision requirement is also getting higher and higher. The installation of traditional elastic hoses is as follows: for the pressing block type pump head, the pressing block can slide vertically up and down. When installing the elastic hose: first, lift the pressing block upward, and the gap between the pressing block and the roller device increases. After putting in the elastic pump tube, then move the pressing block downward to reduce the gap between the pressing block and the roller device and press the elastic pump tube. The gap between the pressing block and the roller device is a fixed value. When the pump head rotates, the gap between the rotor and the pressing block remains fixed, which results in the output liquid pressure changing with the rotation speed; another type is that there is an adjustment knob above the pressing block. When the knob rotates, it drives the screw rod to rotate to adjust the gap between the pressing block and the rotor. Generally, only a small amount of adjustment of the outlet pressure can be made. At the same time, as the outlet pressure increases, the flow rate also decreases. In this adjustment method, as the gap between the pressing block and the rotor becomes smaller, the operation of the elastic pump tube in the pump head becomes more and more unstable, and finally the life of the pump tube drops linearly. Generally, the stable output pressure of the pump heads of these two methods is set below 0.2 Mpa. Therefore, there is an urgent need for a peristaltic pump head with an elastic pressing block that has a simple and compact structure, is easy to install, can stably output a pressure below 0.6 Mpa, and has a constant flow rate at the outlet pressure of 0 - 0.6 Mpa under the same rotation speed. Summary of the Invention

[0003] The purpose of the present invention is to provide a peristaltic pump head with an elastic pressing block capable of outputting high pressure, and solve the problems existing in the above technology that the gap of the traditional peristaltic pump head is fixed and the output pressure is small. When the outlet pressure is greater than 0.1 Mpa, the flow rate will decrease as the pressure increases, and as the pressure increases, the operation of the elastic pump tube in the pump head becomes more and more unstable, and finally the life of the pump tube drops linearly.

[0004] To achieve the above object, the present invention provides a peristaltic pump head with an elastic pressing block capable of outputting high pressure, comprising an elastic pipe pressing device, an opening and closing device, a rear support plate, a hose extrusion device, a lower bracket, a hose fixing device, a positioning column, a mounting plate and a motor; the opening and closing device passes above the elastic pipe pressing device, the elastic pipe pressing device is arranged above the hose extrusion device, the hose extrusion device is arranged above the lower bracket, the lower bracket is arranged on one side of the rear support plate, the rear support plate is arranged on one side of the mounting plate, the motor is arranged on the side of the mounting plate away from the rear support plate, and the output end of the motor is connected to the hose extrusion device; the hose fixing devices are symmetrically arranged on both sides of the lower bracket; and the elastic pipe pressing device is connected to the rear support plate through a self-lubricating locking block.

[0005] Preferably, the opening and closing device includes a cam, a camshaft and a wrench. One end of the camshaft passes through the elastic pipe pressing device and is connected to the wrench, the other end of the camshaft is connected to the cam, and a baffle is arranged at the end of the cam away from the camshaft; and a square groove with the same size as the baffle is arranged on the rear support plate.

[0006] Preferably, a heat insulation cushion plate is arranged between the mounting plate and the motor, and the motor is fixedly connected to the mounting plate through a second screw passing through the heat insulation cushion plate.

[0007] Preferably, the elastic pipe pressing device includes an upper fixed pressing block, a movable pressing block, a first elastic element, a self-lubricating guide rail and a boss; a groove is arranged below the upper fixed pressing block, the movable pressing block is placed in the groove, the first elastic element is arranged between the upper fixed pressing block and the movable pressing block, the boss is arranged on the side of the upper fixed pressing block close to the rear support plate, the self-lubricating guide rail is fixed on the boss through a first screw, and a guide groove adapted to the self-lubricating guide rail is arranged on the rear support plate.

[0008] Preferably, the hose fixing device includes a movable pipe clamp, a fixed seat and a second elastic element. The fixed seat is arranged below the movable pipe clamp, the second elastic element is arranged between the fixed seat and the movable pipe clamp, and a first positioning groove is arranged on the movable pipe clamp.

[0009] Preferably, the fixed seat is connected to the lower bracket through the positioning column, and the fixed seat and the lower bracket are respectively provided with a second positioning groove and a positioning hole adapted to the positioning column.

[0010] Preferably, the hose extrusion device includes a rotary bracket, a bearing arranged between the rotary brackets, a rotary wheel sleeved on the bearing and a pin shaft inserted into the bearing, and a gasket is arranged on the pin shaft.

[0011] Preferably, a transparent protective cover is fixed on the lower bracket by a third screw.

[0012] Preferably, self-lubricating blocks are provided on both sides of the fixing seat close to the movable pipe clamp and on the joint surface between the movable pipe clamp and the lower bracket.

[0013] Preferably, self-lubricating gaskets are provided between the two sides of the movable pressing block and the parts combined with the upper fixing pressing block.

[0014] Therefore, the peristaltic pump head with an elastic pressing block capable of outputting high pressure adopting the above structure has the following beneficial effects:

[0015] 1. The opening and closing device can slide up and down. When sliding upward, the gap between the elastic pipe pressing device and the extrusion hose device increases, facilitating the clamping of the elastic hose; when the opening and closing device slides downward, it presses the elastic hose to make the elastic hose between the elastic pipe pressing device and the extrusion hose device in a sealed state;

[0016] 2. By providing self-lubricating guide rails, self-lubricating gaskets, and self-lubricating blocks, the generation of lubricating oil pollution is avoided.

[0017] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the peristaltic pump head with an elastic pressing block capable of outputting high pressure according to the present invention;

[0019] Figure 2 It is a schematic diagram of a partial structure of the peristaltic pump head with an elastic pressing block capable of outputting high pressure according to the present invention;

[0020] Figure 3 It is a sectional view of the peristaltic pump head with an elastic pressing block capable of outputting high pressure according to the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the fixing seat according to the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the hose fixing device according to the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the extrusion hose device according to the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the elastic pipe pressing device according to the present invention;

[0025] Figure 8 It is a sectional view of the elastic pipe pressing device according to the present invention;

[0026] Figure 9 It is the outlet pressure-flow curve graph of the fixed-gap pump head;

[0027] Figure 10 It is the outlet pressure-flow curve graph of the elastic pressure tube device of the present invention;

[0028] Among them, 1. Elastic pressure tube device; 101. Upper fixed pressing block; 102. Movable pressing block; 103. First elastic element; 104. Self-lubricating guide rail; 2. Opening and closing device; 201. Cam; 202. Camshaft; 203. Wrench; 3. Rear support plate; 4. Extrusion hose device; 401. Rotary bracket; 402. Bearing; 403. Rotary wheel; 404. Pin shaft; 5. Lower bracket; 6. Hose fixing device; 601. Movable pipe clamp; 602. Fixed seat; 603. Second elastic element; 7. Positioning column; 8. Mounting plate; 9. Motor; 10. Heat insulation backing plate; 11. Transparent protective cover; 12. Baffle; 13. First screw; 14. First positioning groove; 15. Gasket; 16. Second positioning groove; 17. Self-lubricating gasket; 18. Self-lubricating block; 19. Self-lubricating locking block. Specific embodiments

[0029] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] Embodiment

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] Please refer to Figure 1-8, A peristaltic pump head with an elastic pressing block capable of outputting high pressure, comprising an elastic tube pressing device 1, an opening and closing device 2, a rear support plate 3, a hose squeezing device 4, a lower bracket 5, a hose fixing device 6, a positioning column 7, a mounting plate 8 and a motor 9; the opening and closing device 2 passes through the upper part of the elastic tube pressing device 1, the elastic tube pressing device 1 is arranged above the hose squeezing device 4, the hose squeezing device 4 is arranged above the lower bracket 5, the lower bracket 5 is arranged on one side of the rear support plate 3, the rear support plate 3 is arranged on one side of the mounting plate 8, the motor 9 is arranged on the side of the mounting plate 8 away from the rear support plate 3, and the output end of the motor 9 is connected to the hose squeezing device 4. The hose fixing devices 6 are symmetrically arranged on both sides of the lower bracket 5, and the elastic tube pressing device 1 is connected to the rear support plate 3 through a self-lubricating locking block 19. The opening and closing device 2 includes a cam 201, a camshaft 202 and a wrench 203. One end of the camshaft 202 passes through the elastic tube pressing device 1 and is connected to the wrench 203, the other end of the camshaft 202 is connected to the cam 201, and a baffle 12 is arranged at the end of the cam 201 away from the camshaft 202. A square groove with the same size as the baffle 12 is arranged on the rear support plate 3. An insulating spacer 10 is arranged between the mounting plate 8 and the motor 9, and the motor 9 is fixedly connected to the mounting plate 8 through a second screw passing through the insulating spacer 10 to prevent the heat generated by the motor 9 from being conducted to the front pump head and causing the surface temperature of the pump head to be too high. The elastic tube pressing device 1 includes an upper fixed pressing block 101, a movable pressing block 102, a first elastic element 103, a self-lubricating guide rail 104, and a boss; a groove is arranged below the upper fixed pressing block 101, the movable pressing block 102 is placed in the groove, the first elastic element 103 is arranged between the upper fixed pressing block 101 and the movable pressing block 102 to ensure that the movable pressing block 102 of the hose squeezing device 4 can slide slightly up and down to ensure a constant output pressure. The boss is arranged on the side of the upper fixed pressing block 101 close to the rear support plate 3, and the self-lubricating guide rail 104 is fixed to the boss through a first screw 13, and a guide groove adapted to the self-lubricating guide rail 104 is arranged on the rear support plate 3. The hose fixing device 6 includes a movable pipe clamp 601, a fixed seat 602, and a second elastic element 603. The fixed seat 602 is arranged below the movable pipe clamp 601, and the second elastic element 603 is arranged between the fixed seat 602 and the movable pipe clamp 601 to achieve self-adaptive fixing of hoses of different specifications. A first positioning groove 14 is arranged on the movable pipe clamp 601 to facilitate the up and down sliding of the hose fixing device 6 under the restriction of the self-lubricating block. The fixed seat 602 is connected to the lower bracket 5 through the positioning column 7, and the fixed seat 602 and the lower bracket 5 are respectively provided with a second positioning groove 16 and a positioning hole adapted to the positioning column 7. The hose squeezing device 4 includes a rotary bracket 401, a bearing 402 arranged between the rotary brackets 401, a rotary wheel 403 sleeved on the bearing 402, and a pin shaft 404 inserted into the bearing 402, and a gasket 15 is arranged on the pin shaft 404.A transparent protective cover 11 is fixed to the lower bracket by a third screw to prevent accidental contact when the extrusion hose device 4 rotates, and at the same time, the operating state of the extrusion hose device 4 when extruding the hose can be observed through the transparent protective cover 11. Self-lubricating blocks 18 are provided on both sides of the fixing seat 602 close to the movable pipe clamp 601 and the joint surface between the movable pipe clamp 601 and the lower bracket 5 to avoid oil pollution caused by adding lubricating oil. Self-lubricating gaskets 17 are provided between the two sides of the movable pressing block 102 and the parts combined with the upper fixed pressing block to avoid oil pollution caused by adding lubricating oil.

[0034] In specific implementation, first, slide the elastic pipe pressing device 1 upward by screwing the opening and closing device 2, so that the gap between the elastic pipe pressing device 1 and the extrusion hose device 4 increases. Then, place the elastic pipe into the extrusion hose device 4. Subsequently, screw the opening and closing device 2 in the reverse direction again to slide the elastic pipe pressing device 1 upward, so that the elastic hose between the elastic pipe pressing device 1 and the extrusion hose device 4 is in a sealed state. Then start the motor 9 to make the device start working, and the staff observes the operating state of the extrusion hose device 4 when extruding the elastic hose through the transparent protective cover 11. By Figure 9 and Figure 10 comparison, it can be seen that the stability of the outlet pressure of the elastic pipe pressing device of the present application is better than that of the traditional fixed-gap pump head. The elastic pipe pressing device of the present application can stably output a pressure between 0 and 0.6 Mpa, and the flow rate is constant at different pressures and the same rotational speed.

[0035] Therefore, the present invention adopts a peristaltic pump head with an elastic pressing block having the above structure to solve the problems of the traditional peristaltic pump head with a fixed gap and a small output pressure. When the outlet pressure is greater than 0.1 Mpa, the flow rate will decrease as the pressure increases, and as the pressure increases, the operation of the elastic pump tube in the pump head becomes more and more unstable, and finally the life of the pump tube drops linearly. The design structure of the present invention is reasonable. When the elastic pipe pressing device slides upward under the action of the opening and closing device, the gap between the elastic pipe pressing device and the extrusion hose device increases, which is convenient for loading and clamping the elastic hose. When the elastic pipe pressing device slides downward, it presses the elastic hose tightly. The elastic pipe pressing device is provided with a movable pressing block, which automatically adjusts the pressing gap when extruding the elastic hose under the action of the elastic element to maintain the best working state; in addition, by setting self-lubricating guide rails, self-lubricating gaskets, and self-lubricating blocks, oil pollution is avoided.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions of the present invention or make equivalent replacements, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A peristaltic pump head with an elastic pressing block capable of outputting high pressure, characterized in that: It includes an elastic pipe pressing device, an opening and closing device, a rear support plate, a hose extrusion device, a lower support, a hose fixing device, positioning columns, a mounting plate and a motor; the opening and closing device passes above the elastic pipe pressing device, the elastic pipe pressing device is arranged above the hose extrusion device, the hose extrusion device is arranged above the lower support, the lower support is arranged on one side of the rear support plate, the rear support plate is arranged on one side of the mounting plate, the motor is arranged on the side of the mounting plate away from the rear support plate, and the output end of the motor is connected to the hose extrusion device; the hose fixing devices are symmetrically arranged on both sides of the lower support, and the elastic pipe pressing device is connected to the rear support plate through a self-lubricating locking block; The opening and closing device includes a cam, a camshaft and a wrench; one end of the camshaft passes through the elastic pipe pressing device and is connected to the wrench, the other end of the camshaft is connected to the cam, and a baffle is arranged at the end of the cam away from the camshaft; a square groove with the same size as the baffle is arranged on the rear support plate; The elastic pipe pressing device includes an upper fixed pressing block, a movable pressing block, a first elastic element, a self-lubricating guide rail and a boss; a groove is arranged below the upper fixed pressing block, the movable pressing block is placed in the groove, the first elastic element is arranged between the upper fixed pressing block and the movable pressing block, the boss is arranged on the side of the upper fixed pressing block close to the rear support plate, the self-lubricating guide rail is fixed on the boss by a first screw, and a guide groove adapted to the self-lubricating guide rail is arranged on the rear support plate; The hose fixing device includes a movable pipe clamp, a fixed seat and a second elastic element; the fixed seat is arranged below the movable pipe clamp, the second elastic element is arranged between the fixed seat and the movable pipe clamp, and a first positioning groove is arranged on the movable pipe clamp; The hose extrusion device includes a rotary support, bearings arranged between the rotary supports, a rotary wheel sleeved on the bearings and a pin shaft inserted into the bearings; gaskets are arranged at both ends of the bearings.

2. The peristaltic pump head with an elastic pressing block capable of outputting high pressure according to claim 1, characterized in that: A heat insulation cushion plate is arranged between the mounting plate and the motor, and the motor is fixedly connected to the mounting plate by a second screw.

3. The peristaltic pump head with an elastic pressing block capable of outputting high pressure according to claim 1, wherein: The fixed seat is connected to the lower support through the positioning columns, and second positioning grooves and positioning holes adapted to the positioning columns are respectively arranged on the fixed seat and the lower support.

4. The peristaltic pump head with an elastic pressing block capable of outputting high pressure according to claim 1, characterized in that: A transparent protective cover is fixed on the lower support by a third screw.

5. The peristaltic pump head with an elastic pressing block capable of outputting high pressure according to claim 1, wherein: Self-lubricating blocks are arranged on both sides of the fixed seat close to the movable pipe clamp and on the joint surface between the movable pipe clamp and the lower support.

6. The peristaltic pump head with an elastic pressing block capable of outputting high pressure according to claim 1, characterized in that: Self-lubricating gaskets are arranged between the parts where both sides of the movable pressing block are combined with the upper fixed pressing block.

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