Rotary piston pump head assembly and rotary piston pump

Abstract

The present invention discloses a rotary piston pump head assembly and a rotary piston pump, which relate to the technical field of fluid delivery equipment. The rotary piston pump head assembly includes a mounting seat for mounting a driving mechanism and a pump head, and the mounting seat includes a second plate body with an adjustable angle and a first plate body, wherein the second plate body is connected to the first plate body by elastic bending, and further includes an angle adjustment assembly with adjustable length, wherein one end of the angle adjustment assembly is hingedly connected to the second plate body, and the other end is hingedly connected to the first plate body; the number of the angle adjustment assemblies is greater than or equal to 2. The rotary piston pump includes the pump head assembly. This scheme is specifically a pump head angle adjustment scheme and a rotary piston pump including the scheme.

Description

Technical Field

[0001] The invention relates to the technical field of fluid conveying equipment, and in particular to a rotary plunger pump head assembly and a rotary plunger pump. Background Art

[0002] In the food industry, medical industry, chemical industry, pharmaceutical industry, daily necessities industry, etc., the rotary plunger pump is an important form of precision micro-liquid flow pump. Its basic composition is provided by the applicant in the patent document with application number CN200720082409.8 and invention name of rotary plunger pump. Its basic structure includes a pump rod, a pump sleeve and a driving mechanism. The front end of the pump rod is provided with a notch and is matched with the pump sleeve with high precision. The pump sleeve is provided with an inlet, outlet and port pipe. The rear end of the pump rod is connected to the driving mechanism for outputting the rotary motion. The specific connection position of the pump rod on the driving mechanism is eccentric relative to the rotary motion center of the driving mechanism. The specific working principle is: when the driving mechanism rotates, under the action of the driving mechanism, the pump rod reciprocates in a straight line along the axis of the pump sleeve in the pump sleeve and rotates. The above reciprocating motion is the suction and extrusion action of the pump, and the rotation is to switch the conduction relationship between the volume chamber inside the pump sleeve and the inlet, outlet and port pipe. Compared with the traditional piston pump, one of the characteristics is to avoid matching the pump body with a one-way valve.

[0003] The flow adjustment method of a rotary piston pump generally includes: adjusting the movement speed of the pump rod and the stroke of the pump rod in the pump sleeve, such as the scheme disclosed in patent application documents with application numbers CN201822069211.7 and CN202121394021.8. By adjusting the angle of the pump head, the stroke of the pump rod in the pump sleeve can be adjusted to achieve the purpose of adjusting the fluid flow output by the pump rod to complete a single rotation and reciprocating motion. Regarding the angle adjustment method of the pump head, such as the scheme disclosed in patent application documents with application numbers CN202310865246.4 and CN202311321989.1, the mounting base used to realize the installation of the drive mechanism and the pump head is a split structure, which includes a first plate body and a second plate body hingedly connected by a hinge axis, and the angle change of the pump head is synchronized with the change of the angle between the first plate body and the second plate body. The angle change is the relative rotation of the first plate body and the second plate body around the hinge axis. The power source of the relative rotation is an angle adjustment rod with adjustable length or a threaded drive mechanism. The two ends of the angle adjustment rod are respectively hingedly connected to the first plate body and the second plate body. The threaded drive mechanism converts the rotational motion into the linear motion of the nut thereon, and realizes the relative rotation through the linear motion. If necessary, a special elastic mechanism needs to be set to realize the fixing of the pump head angle.

[0004] In view of the important role of rotary piston pumps in industrial production and other industries, it is necessary to further improve the technologies related to rotary piston pumps so that they can better serve various industries. Summary of the invention

[0005] In response to the above-mentioned technical problem of further improving the rotary piston pump, the present invention provides a rotary piston pump head assembly and a rotary piston pump, specifically a pump head angle adjustment scheme and a rotary piston pump including the scheme.

[0006] In view of the above problems, the rotary piston pump head assembly and the rotary piston pump provided by the present invention solve the problems through the following technical points: the rotary piston pump head assembly includes a mounting seat for mounting a driving mechanism and a pump head, the mounting seat includes a second plate body with adjustable angle and a first plate body, the second plate body is connected to the first plate body by elastic bending, and also includes an angle adjustment assembly with adjustable length, one end of the angle adjustment assembly is hingedly connected to the second plate body, and the other end is hingedly connected to the first plate body;

[0007] The number of the angle adjustment components is greater than or equal to 2.

[0008] In the prior art, for the technical solution of adjusting the flow rate of the rotary plunger pump by adjusting the pump head angle, there are two hingedly connected plate bodies, a driving mechanism and a pump head connected to different plate bodies, and a technical solution of adjusting the angle between the plate bodies through an angle adjustment mechanism, wherein the angle adjustment mechanism acts on the corresponding plate body in a push or pull manner by adjusting the length to adjust the angle between the plate bodies. At the same time, the plate body is generally a split design and is hingedly connected by an articulated shaft. After adjusting to the required angle, in order to stabilize the pump head angle during the operation of the rotary plunger pump, a coil spring as a tension spring is provided in the technical solution provided by application number CN201822069211.7, and a coil spring as a thrust spring is provided in the technical solution provided by application number CN202121394021.8. Others also include a technical solution of locking the pump head angle by a locking nut after adjusting to the required angle. Related to the above pump head angle adjustment scheme, this scheme provides a pump head assembly different from the prior art.

[0009] In the present solution, one of the first plate body and the second plate body is used to install the pump head of the rotary piston pump, and the other is used to install the driving mechanism for driving the pump head to move. When the length of the angle adjustment component which is hingedly connected to the first plate body and the second plate body at both ends changes, the angle adjustment component flips relative to the first plate body and the second plate body, and the specific flipping position is located at the corresponding hinged connection position, and provides thrust or pulling force for the first plate body and the second plate body. After the above thrust or pulling force is transmitted to the elastic bend through the first plate body and the second plate body, the elastic bend undergoes elastic deformation, thereby driving the first plate body and the second plate body to flip relative to each other, so as to achieve the purpose of adjusting the angle of the pump head to change the flow rate of the pump head.

[0010] Different from the prior art, the elastic bend serves as a connecting piece between the first plate body and the second plate body, so that the first plate body, the elastic bend and the second plate body form an integral structure. Compared with the existing split mounting seat and the various parts of the mounting seat connected by a hinge shaft, the structure of this scheme is simpler, especially when the angle adjustment component is set to be located above the pump head and the elastic bend is located below the pump head. Since there is no hinge structure required for angle adjustment on the mounting seat below the pump head, this scheme can effectively prevent corrosive and polluting fluids from entering the narrow gap of the mounting seat after fluid leakage. This is not only beneficial for handling leaking fluids in the rotary piston pump, but also beneficial to the life of the corresponding connecting structure on the pump head assembly and the long-term matching accuracy.

[0011] The present scheme is arranged that the number of the angle adjustment components is greater than or equal to 2. During specific use, by adjusting the length of each angle adjustment component respectively, some angle adjustment components provide a thrust to increase the angle between the first plate body and the second plate body, and some angle adjustment provides a thrust to reduce the angle between the first plate body and the second plate body. The angle adjustment components influence each other to increase the force applied to each angle adjustment component during use. In this way, even if the elastic bend is in a natural form or the elastic bend has a small elastic coefficient, the angle adjustment components can cooperate with each other and each angle adjustment component can have a large load state, so that the mounting seat can maintain a stable shape to maintain the angle of the pump head, thereby avoiding a small deformation due to the elastic bend. The angle adjustment component provides a small pulling force or thrust in this state, and the shape of the mounting seat is easily destroyed due to vibration during the operation of the pump head. Specifically, it can be used as an elastic bend that is processed to have a smaller elastic coefficient. In this way, after releasing the angle adjustment component, first adjust the length of some angle adjustment components and increase the length, so that these angle adjustment components provide thrust for the mounting seat to adjust the angle of the pump head, and then adjust the length of other angle adjustment components and shorten the length, so that these angle adjustment components provide tension for the mounting seat. In the process of increasing tension, the force applied to each angle adjustment component increases, while the shape of the mounting seat remains unchanged. In this process, since the corresponding angle adjustment component is subjected to less force in the pump head angle adjustment stage, it can be easily adjusted to the required pump head angle, and the subsequent process increases the load of each angle adjustment component, so after the adjustment is completed, the mounting seat can have a stronger ability to resist morphological destruction; similarly, the pump head angle adjustment stage can also be achieved by shortening the length of the angle adjustment component so that the first plate and the second plate on the mounting seat are subjected to tension, and the subsequent angle adjustment component load increase stage is to adjust the length of other angle adjustment components to make them stretch, thereby providing thrust for the first plate and the second plate.

[0012] The present solution adopts the elastic bend as a connecting piece between the first plate body and the second plate body, so that the angle change and maintenance between the first plate body and the second plate body occur under the elastic deformation of the elastic bend. The elastic deformation of the elastic bend can not only be used to assist in maintaining the length of the angle adjustment component to maintain the state of the mounting seat, but also compared with plastic deformation, the elastic bend can be bent to different degrees more times to ensure the life of the pump head assembly.

[0013] As a further technical solution of the rotary piston pump head assembly:

[0014] The mounting seat is an integral structure formed by the second plate body, the first plate body and an elastic bend, and the two ends of the elastic bend are: one end is connected to the bottom end of the first plate body, and the other end is connected to the bottom end of the second plate body;

[0015] The two ends of the angle adjustment component are: one end is connected to the upper end of the second plate body, and the other end is connected to the upper end of the first plate body. This solution provides a specific implementation form of a mounting seat, that is, the mounting seat is not a spliced ​​structure, but the first plate body, the second plate body, and the elastic bend are set as an integral structure. During implementation, the integral structure is obtained by a mechanical processing method and / or a casting method, and a solution is provided in which the angle adjustment component and the elastic bend are located on a pair of opposite ends of the mounting seat. By adopting this solution, the angle adjustment between the first plate body and the second plate body can be made with high precision and small required force.

[0016] The number of the angle adjustment components is greater than or equal to 3, and angle adjustment components are provided at both ends and the middle of the mounting seat in the length direction of the mounting seat. This scheme can be specifically applied as follows: the angle adjustment components at both ends of the mounting seat act in the same way on the first plate body and the second plate body, such as providing thrust or pulling force at the same time, and the angle adjustment components in the middle act on the mounting seat in the opposite way to the angle adjustment components at the ends. In this way, when multiple pump heads are arranged at intervals in the length direction of the mounting seat, in the process of adjusting the angle of the first plate body and the second plate body, by controlling the uniformity of the length change of the angle adjustment components at each position, the flow change of each pump head can be made consistent, and when the corresponding rotary piston pump is used to stabilize the fluid output at different times, the flow of the output fluid at each time can be made more balanced; at the same time, in the process of increasing the load of the angle adjustment components, the number of the above angle adjustment components and the position selection on the mounting seat can make the load of each angle adjustment component more balanced and reduce the local deformation of the mounting seat in the process.

[0017] The angle adjustment assembly includes a connecting screw, a thrust bearing, a flip seat, a sleeve and a screw;

[0018] The connecting screw is threadedly connected to one end of the sleeve, the screw is threadedly connected to the other end of the sleeve, and the connecting screw, the thrust bearing, the sleeve and the screw are coaxial;

[0019] The flip seat is provided with a through hole, and a structure formed by a connecting screw and a sleeve passes through the through hole, and the nail cap end of the connecting screw and the end of the sleeve used for connecting with the screw rod are both located outside the flip seat;

[0020] The thrust bearing is sleeved on the structure and clamped between the nail cap end and the flip seat, and the flip seat is clamped between the thrust bearing and the sleeve;

[0021] The sleeve can rotate relative to the flip seat around the axis of the sleeve;

[0022] One of the flip seat and the screw is hingedly connected to the first plate, and the other is hingedly connected to the second plate. This solution provides an angle adjustment component different from the prior art. Specifically, when the sleeve is rotated, the extension length of the screw relative to the sleeve changes. According to the rotation direction of the sleeve, the change is used to apply a thrust or a pull to the first plate and the second plate, so that the angle between the first plate and the second plate changes, so as to achieve the purpose of adjusting the angle of the pump head end of the rotary plunger pump to adjust the plunger stroke.

[0023] At the same time, the specific structural design of the angle adjustment component has the following characteristics: the screw rod is threadedly connected to the sleeve, the connecting screw is threadedly connected to the sleeve, and the flip seat and the thrust bearing are clamped between the connecting screw and the sleeve. The above scheme is not only simple in structure, but also achieves tight fit of the axial components of the angle adjustment component by clamping the thrust bearing and the flip seat through the connecting screw. When torque is applied to the sleeve to make it rotate, since the thrust bearing is clamped between the nail cap end and the flip seat, when the connecting thread between the connecting screw and the sleeve is installed to have a certain elastic deformation, since the resistance to the rotation of the connecting screw relative to the flip seat is only the rolling friction occurring on the thrust bearing, relative to the connecting screw, whether the sleeve is rotating forward or reverse, the sleeve can easily drive the connecting screw to rotate relative to the flip seat, thereby avoiding the connection screw from loosening. Therefore, this scheme has the characteristics of high structural reliability on the basis of simple structure.

[0024] The matching relationship between the flip seat and the sleeve can be that one end of the sleeve directly presses on the side of the flip seat, or the side of the flip seat acts on the step surface of the sleeve, and the sleeve has a barrel section extending into the through hole. In the process of screwing the connecting screw into the sleeve, the specific screwing depth is controlled by the thrust bearing: the gasket at one end of the thrust bearing is supported on the flip seat, and the nail cap end is supported by the gasket at the other end of the thrust bearing.

[0025] Preferably, in order to keep the connecting screw and the thrust bearing in an ideal matching relationship for a long time, a groove matching with the thrust bearing gasket is provided on the flip seat, and a groove matching with the nail cap end is provided on the thrust bearing gasket. The groove on the flip seat is used to define the position of the thrust bearing in the radial direction of the groove, and the groove on the gasket is used to define the position of the nail cap end in the radial direction of the groove. This can effectively avoid the contact between the rod section of the connecting screw and the gasket on the thrust bearing close to the flip seat and the contact between the rod section and the retainer of the thrust bearing due to the lateral displacement of the thrust bearing. Furthermore, the sleeve has the step surface and has a barrel section embedded in the through hole, so as to contact the hole wall of the through hole through the side wall of the sleeve, thereby avoiding direct contact between the rod section and the flip seat.

[0026] Preferably, in order to maintain a tight fit between the connecting screw and the sleeve, the axial force between the connecting screw and the sleeve can be maintained by an additional elastic pad, which can be arranged between the thrust bearing and the flip seat, or between the thrust bearing and the nail cap end.

[0027] Preferably, the sleeve is in the shape of a stepped shaft, and one end of the sleeve connected to the connecting screw is embedded in the through hole, and the flip seat is clamped between the shaft shoulder on the sleeve and the end of the thrust bearing. This scheme is a technical scheme proposed above, which constrains the flip seat at one end of the sleeve in the axial direction by forming a stepped surface on the sleeve, and avoids direct contact between the connecting screw rod section and the flip seat by embedding the sleeve into the through hole. Since the sleeve rotates synchronously as a whole when a torque is applied to the sleeve, the friction between the sleeve and the flip seat is easy to overcome and will not cause other adverse effects. The preferred application is that the outer diameter of the through hole is consistent with the inner diameter of the through hole to avoid the sleeve having a shaking gap relative to the flip seat in its radial direction.

[0028] The flip seat is connected to a first rolling bearing whose axis is perpendicular to the sleeve axis, and the screw is connected to a second rolling bearing whose axis is perpendicular to the sleeve axis;

[0029] The articulated connection is achieved by the first rolling bearing and the second rolling bearing:

[0030] The flip seat is hingedly connected to the second plate body through the first rolling bearing, and the screw is hingedly connected to the first plate body through the second rolling bearing. In this solution, by adopting the first rolling bearing and the second rolling bearing, the flipping of the angle adjustment component relative to the mounting seat during the extension and shortening process can occur at the corresponding rolling bearing position, especially when the angle adjustment component is subjected to a large load, the first rolling bearing and the second rolling bearing roll in a manner of bearing radial force, which can not only avoid the angle adjustment component from being greatly worn during repeated use, but also enable this solution to maintain the matching accuracy of the angle adjustment component and the mounting seat for a long time, and at the same time, the corresponding flipping occurs flexibly, which is beneficial to the angle adjustment accuracy of the pump head. In specific implementation, the corresponding bearing seats can be installed on the first plate body and the second plate body respectively. The preferred application is to adopt the following method of setting the first trough body and the second trough body.

[0031] The first plate body is provided with a first slot body, and the second plate body is provided with a second slot body;

[0032] The first slot body is a T-slot, and the second slot body is a cross slot;

[0033] The free end of the screw rod and the second rolling bearing are embedded in the first slot body, and the nail cap end of the connecting screw, the thrust bearing, the flip seat and the first rolling bearing are all embedded in the second slot body;

[0034] The sleeve is partially exposed in the gap between the first plate body and the second plate body. In this solution, the first rolling bearing and the flip seat are embedded in the transverse groove of the second groove body, and the longitudinal groove of the second groove body accommodates the sleeve, the thrust bearing and the connecting screw. When the sleeve moves axially relative to the screw on the axis of the screw, the sleeve, the flip seat and the thrust bearing flip around the rotation center of the first rolling bearing. According to the setting form of the first groove body, the second rolling bearing is set at the free end of the screw, the transverse groove of the first groove body is used to install the second rolling bearing, and the longitudinal groove of the first groove body is used to accommodate the screw. For the first rolling bearing and the second rolling bearing, when the installation on the first plate body and the second plate body is completed by the corresponding groove body, each can be constrained by the end of the corresponding transverse groove on the first groove body and the second groove body. The first rolling bearing and the second rolling bearing can be connected with the flip seat and the screw by a simple connection mechanism, such as the first rolling bearing and the second rolling bearing are: the inner ring is interference-fitted with the rotating shaft, the corresponding rotating shaft is interference-connected with the flip seat or the screw, and the outer ring is clamped in the corresponding transverse groove. The sleeve part exposed in the gap has open space on both sides, and a wrench buckle surface can be processed at this position of the sleeve, so that the wrench tool can be used to provide torque for the sleeve, forcing it to rotate relative to the screw, thereby adjusting the length of the angle adjustment assembly. Preferably, in the process of rotating the sleeve, the sleeve moves along the axis of the screw relative to the screw, so a scale mark arranged along the axis of the screw can be set on the screw, so that the position of the sleeve end close to the free end of the screw on the scale mark indicates the length of the angle adjustment assembly.

[0035] It also includes a second cover plate connected to the second plate body by screws and used to close the second tank body;

[0036] The first cover plate is connected to the first plate body by screws and is used to close the first slot body. In this solution, the second cover plate is used to prevent the flip seat and the first rolling bearing from falling out of the second slot body, and the first cover plate is used to prevent the second rolling bearing from falling out of the first slot body, so as to improve the reliability of the structure.

[0037] The present invention also discloses a rotary piston pump, including a pump head and a driving mechanism, and also including a pump head assembly as described in any one of the above, wherein the driving mechanism is mounted on the second plate body, and the pump head is mounted on the first plate body. The present invention is a rotary piston pump including the pump head assembly, and as described above, when the posture of the second plate body in space remains unchanged, by adjusting the length of the angle adjustment assembly and utilizing the force of the angle adjustment assembly on the first plate body and the second plate body, the angle of the pump head axis relative to the axis of the driving mechanism can be adjusted, thereby achieving the purpose of adjusting the fluid flow output by one action process of the pump head.

[0038] As a further technical solution of the rotary piston pump:

[0039] The number of the pump heads is greater than or equal to 2, and each pump head is connected to the drive mechanism through a gear transmission mechanism. This scheme is a technical scheme that can adjust the flow output of the rotary piston pump at each moment by controlling the phase difference between the pump heads. At the same time, it is a scheme that uses the drive mechanism as a common power source, and the gear transmission mechanism allows each pump head to work synchronously, so that the flow output of the rotary piston pump is more stable. When these pump heads are used to output the same fluid, the rotary piston pump can be configured as a constant flow pump with uniform flow output at each moment. When these pump heads are used to synchronously output different fluids, these fluids can be output at a constant ratio under the action of the drive mechanism, so that the rotary piston pump is suitable for batching and mixing.

[0040] The first plate body and the second plate body are both rectangular parallelepiped structures, the connection positions of the elastic bends on the first plate body and the second plate body are both located on their respective length sides, the angle adjustment components are arranged at intervals in the length direction of the first plate body, and the angle adjustment components are arranged at intervals in the length direction of the second plate body;

[0041] In the height direction of the mounting seat, the elastic bend is arranged at the bottom end of the mounting seat, and the angle adjustment component is arranged at the upper end of the mounting seat;

[0042] The pump heads are arranged at the upper end of the first plate body and are arranged at intervals along the length direction of the first plate body. This solution is a solution that facilitates adjusting the angle of the pump head through the angle adjustment component: the angle of the pump head is adjusted by operating the angle adjustment component at the upper end of the mounting seat; at the same time, this solution provides a technical solution in which an elastic bend and the angle adjustment component are arranged at the opposite end of the mounting seat; at the same time, this solution provides a technical solution in which the angles of the pump heads can be changed synchronously in the process of reasonably configuring the angle adjustment components.

[0043] The present invention has the following beneficial effects:

[0044] In the present solution, the elastic bend serves as a connecting piece between the first plate body and the second plate body, so that the first plate body, the elastic bend and the second plate body form an integral structure. Compared with the existing split mounting seat and the various parts of the mounting seat connected by a hinge shaft, the structure of the present solution is simpler, especially when the angle adjustment component is set to be located above the pump head and the elastic bend is located below the pump head. Since there is no hinge structure required for angle adjustment on the mounting seat below the pump head, the present solution can effectively prevent corrosive and polluting fluids from entering the slit of the mounting seat after fluid leakage. This is not only beneficial for handling leaking fluids in the rotary piston pump, but also beneficial to the life of the corresponding connecting structure on the pump head assembly and the long-term matching accuracy.

[0045] The present scheme is arranged that the number of the angle adjustment components is greater than or equal to 2. During specific use, by adjusting the length of each angle adjustment component respectively, some angle adjustment components provide a thrust to increase the angle between the first plate body and the second plate body, and some angle adjustment provides a thrust to reduce the angle between the first plate body and the second plate body. The angle adjustment components influence each other to increase the force applied to each angle adjustment component during use. In this way, even if the elastic bend is in a natural form or the elastic bend has a small elastic coefficient, the angle adjustment components can cooperate with each other and each angle adjustment component can have a large load state, so that the mounting seat can maintain a stable shape to maintain the angle of the pump head, thereby avoiding a small deformation due to the elastic bend. The angle adjustment component provides a small pulling force or thrust in this state, and the shape of the mounting seat is easily destroyed due to vibration during the operation of the pump head.

[0046] The present solution adopts the elastic bend as a connecting piece between the first plate body and the second plate body, so that the angle change and maintenance between the first plate body and the second plate body occur under the elastic deformation of the elastic bend. The elastic deformation of the elastic bend can not only be used to assist in maintaining the length of the angle adjustment component to maintain the state of the mounting seat, but also compared with plastic deformation, the elastic bend can be bent to different degrees more times to ensure the life of the pump head assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A side view of a specific embodiment of the rotary piston pump described in this solution;

[0048] Figure 2 A top view of a specific embodiment of the rotary piston pump described in this solution;

[0049] Figure 3 A top view of a specific embodiment of a rotary piston pump head assembly according to the present invention;

[0050] Figure 4 This is a cross-sectional view of a specific embodiment of the angle adjustment component described in this solution, and the cross-sectional view is a local structural cross-sectional view.

[0051] The reference numerals in the figure are: 1. driving mechanism, 2. second plate body, 3. elastic bending, 4. first plate body, 5. pump head, 6. angle adjustment assembly, 61. connecting screw, 62. thrust bearing, 63. first rolling bearing, 64. flip seat, 65. sleeve, 66. screw, 67. rotating shaft, 68. second rolling bearing, 7. second trough body, 8. first trough body. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments:

[0053] Embodiment 1:

[0054] like Figures 1 to 4 As shown, the pump head assembly of the rotary piston pump includes a mounting seat for mounting a driving mechanism 1 and a pump head 5, wherein the mounting seat includes a second plate body 2 with adjustable angle and a first plate body 4, wherein the second plate body 2 is connected to the first plate body 4 through an elastic bend 3, and further includes an angle adjustment assembly 6 with adjustable length, wherein one end of the angle adjustment assembly 6 is hingedly connected to the second plate body 2, and the other end is hingedly connected to the first plate body 4;

[0055] The number of the angle adjustment components 6 is greater than or equal to 2.

[0056] In the prior art, for the technical solution of adjusting the flow rate of the rotary plunger pump by adjusting the angle of the pump head 5, there is a technical solution that uses two hingedly connected plates, a drive mechanism 1 and a pump head 5 to be connected to different plates, and an angle adjustment mechanism is used to adjust the angle between the plates. The angle adjustment mechanism acts on the corresponding plate in a push or pull manner by adjusting the length to adjust the angle between the plates. At the same time, the plate is generally a split design and is hingedly connected by an articulated shaft. After adjusting to the required angle, in order to stabilize the angle of the pump head 5 during the operation of the rotary plunger pump, a coil spring as a tension spring is provided in the technical solution provided by application number CN201822069211.7, and a coil spring as a thrust spring is provided in the technical solution provided by application number CN202121394021.8. Others also include a technical solution that uses a locking nut to lock the angle of the pump head 5 after adjusting to the required angle. Related to the above pump head 5 angle adjustment solution, this solution provides a pump head assembly different from the prior art.

[0057] In the present solution, one of the first plate body 4 and the second plate body 2 is used to install the pump head 5 of the rotary piston pump, and the other is used to install the driving mechanism 1 for driving the pump head 5. When the length of the angle adjustment component 6, which is hingedly connected to the first plate body 4 and the second plate body 2 at both ends, changes, the angle adjustment component 6 flips relative to the first plate body 4 and the second plate body 2, and the specific flipping position is located at the corresponding hinged connection position, and provides thrust or pulling force for the first plate body 4 and the second plate body 2. After the above thrust or pulling force is transmitted to the elastic bend 3 through the first plate body 4 and the second plate body 2, the elastic bend 3 undergoes elastic deformation, thereby driving the first plate body 4 and the second plate body 2 to flip relative to each other, so as to achieve the purpose of adjusting the angle of the pump head 5 to change the flow rate of the pump head 5.

[0058] Different from the prior art, the elastic bend 3 serves as a connecting piece between the first plate body 4 and the second plate body 2, so that the first plate body 4, the elastic bend 3, and the second plate body 2 form an integral structure. Compared with the existing split mounting seat and the various parts of the mounting seat connected by a hinge shaft, the structure of this scheme is simpler, especially when the angle adjustment component 6 is set to be located above the pump head 5 and the elastic bend 3 is located below the pump head 5. Since there is no hinge structure required for angle adjustment on the mounting seat below the pump head 5, the present scheme can effectively prevent corrosive and polluting fluids from entering the slit of the mounting seat after fluid leakage. This is not only beneficial for handling leaking fluids in the rotary piston pump, but also beneficial to the life of the corresponding connecting structure on the pump head assembly and the long-term matching accuracy.

[0059] In this scheme, the number of the angle adjustment components 6 is greater than or equal to 2. During specific use, by adjusting the length of each angle adjustment component 6 respectively, some of the angle adjustment components 6 provide a thrust to increase the angle between the first plate body 4 and the second plate body 2, and some of the angle adjustment provides a thrust to reduce the angle between the first plate body 4 and the second plate body 2. The angle adjustment components 6 influence each other to increase the force applied to each angle adjustment component 6 during use. In this way, even if the elastic bend 3 is in a natural shape or the elastic bend 3 has a small elastic coefficient, the angle adjustment components 6 can cooperate with each other and each angle adjustment component 6 has a large load, so that the mounting seat can maintain a stable shape to maintain the angle of the pump head 5, thereby avoiding the situation where the elastic bend 3 undergoes a small deformation, the angle adjustment component 6 provides a small pulling force or thrust in this state, and the shape of the mounting seat is easily destroyed due to vibration during the operation of the pump head 5. Specifically, the elastic bend 3 can be processed to have a smaller elastic coefficient. In this way, after releasing the angle adjustment component 6, first adjust the length of some angle adjustment components 6 and increase the length, so that these angle adjustment components 6 provide thrust for the mounting seat to adjust the angle of the pump head 5, and then adjust the length of other angle adjustment components 6 and shorten the length, so that these angle adjustment components 6 provide tension for the mounting seat. In the process of increasing tension, the force of each angle adjustment component 6 increases, while the shape of the mounting seat remains unchanged. In this process, since the corresponding angle adjustment component 6 is less stressed in the stage of adjusting the angle of the pump head 5, it can be easily adjusted to the required angle of the pump head 5. The subsequent process increases the load of each angle adjustment component 6, so after the adjustment is completed, the mounting seat can have a stronger ability to resist morphological destruction; similarly, the stage of adjusting the angle of the pump head 5 can also be to shorten the length of the angle adjustment component 6 so that the first plate 4 and the second plate 2 on the mounting seat are subjected to tension, and the subsequent stage of increasing the load of the angle adjustment component 6 is to adjust the length of other angle adjustment components 6 to make them elongate, thereby providing thrust for the first plate 4 and the second plate 2.

[0060] This solution adopts the elastic bend 3 as a connecting piece between the first plate body 4 and the second plate body 2, so that the angle change and maintenance between the first plate body 4 and the second plate body 2 occur under the elastic deformation of the elastic bend 3. The elastic deformation of the elastic bend 3 can not only be used to assist in maintaining the length of the angle adjustment component 6 to maintain the state of the mounting seat, but also compared with plastic deformation, the elastic bend 3 can be bent to different degrees more times to ensure the life of the pump head assembly.

[0061] Embodiment 2:

[0062] This embodiment is further refined on the basis of embodiment 1:

[0063] The mounting seat is an integral structure formed by the second plate body 2, the first plate body 4 and the elastic bend 3, and the two ends of the elastic bend 3 are: one end is connected to the bottom end of the first plate body 4, and the other end is connected to the bottom end of the second plate body 2;

[0064] The two ends of the angle adjustment component 6 are: one end is connected to the upper end of the second plate body 2, and the other end is connected to the upper end of the first plate body 4. This solution provides a specific implementation form of a mounting seat, that is, the mounting seat is not a spliced ​​structure, but the first plate body 4, the second plate body 2, and the elastic bend 3 are set as an integral structure. During implementation, the integral structure is obtained by a mechanical processing method and / or a casting method, and a solution is provided in which the angle adjustment component 6 and the elastic bend 3 are located on a pair of opposite ends of the mounting seat. By adopting this solution, the angle adjustment between the first plate body 4 and the second plate body 2 can be made with high precision and small required force.

[0065] Embodiment 3:

[0066] This embodiment is further refined on the basis of embodiment 1:

[0067] The number of the angle adjustment components 6 is greater than or equal to 3, and the two ends and the middle of the mounting seat are provided with angle adjustment components 6 in the length direction of the mounting seat. This scheme can be specifically applied as follows: the angle adjustment components 6 at the two ends of the mounting seat act in the same way on the first plate body 4 and the second plate body 2, such as providing thrust or pulling force at the same time, and the angle adjustment components 6 in the middle act on the mounting seat in the opposite way to the angle adjustment components 6 at the end. In this way, when multiple pump heads 5 are arranged at intervals in the length direction of the mounting seat, in the process of adjusting the angle of the first plate body 4 and the second plate body 2, by controlling the uniformity of the length change of the angle adjustment components 6 at each position, the flow change of each pump head 5 can be made consistent, and when the corresponding rotary piston pump is used to stabilize the fluid output at different times, the flow rate of the output fluid at each time can be made more balanced; at the same time, in the process of increasing the load of the angle adjustment components 6, the number of the above angle adjustment components 6 and the position selection on the mounting seat can make the load of each angle adjustment component 6 more balanced and reduce the local deformation of the mounting seat in the process.

[0068] Embodiment 4:

[0069] This embodiment is further refined on the basis of embodiment 1:

[0070] The angle adjustment assembly 6 includes a connecting screw 61, a thrust bearing 62, a flip seat 64, a sleeve 65 and a screw 66;

[0071] The connecting screw 61 is threadedly connected to one end of the sleeve 65, and the screw 66 is threadedly connected to the other end of the sleeve 65. The connecting screw 61, the thrust bearing 62, the sleeve 65 and the screw 66 are coaxial.

[0072] The flip seat 64 is provided with a through hole, and a structure formed by the connecting screw 61 and the sleeve 65 passes through the through hole, and the nail cap end of the connecting screw 61 and the end of the sleeve 65 for connecting with the screw rod 66 are both located outside the flip seat 64;

[0073] The thrust bearing 62 is sleeved on the structure and clamped between the nail cap end and the flip seat 64, and the flip seat 64 is clamped between the thrust bearing 62 and the sleeve 65;

[0074] The sleeve 65 can rotate relative to the flip seat 64 around the axis of the sleeve 65;

[0075] One of the flip seat 64 and the screw rod 66 is hingedly connected to the first plate body 4, and the other is hingedly connected to the second plate body 2. This solution provides an angle adjustment assembly 6 different from the prior art. Specifically, when the sleeve 65 is rotated, the extension length of the screw rod 66 relative to the sleeve 65 changes. According to the rotation direction of the sleeve 65, the change is used to apply a thrust or a pull to the first plate body 4 and the second plate body 2, so that the angle between the first plate body 4 and the second plate body 2 changes, so as to adjust the angle of the end of the pump head 5 of the rotary plunger pump to adjust the plunger stroke.

[0076] At the same time, the specific structural design of the angle adjustment component 6 has the following characteristics: the screw rod 66 is threadedly connected to the sleeve 65, the connecting screw 61 is threadedly connected to the sleeve 65, and the flip seat 64 and the thrust bearing 62 are clamped between the connecting screw 61 and the sleeve 65. The above scheme is not only simple in structure, but also realizes the tight fit of the various components in the axial direction of the angle adjustment component 6 by clamping the thrust bearing 62 and the flip seat 64 by the connecting screw 61. When torque is applied to the sleeve 65 to make it rotate, since the thrust bearing 62 is clamped between the nail cap end and the flip seat 64, when the connecting thread between the connecting screw 61 and the sleeve 65 is installed to have a certain elastic deformation, since the resistance to the rotation of the connecting screw 61 relative to the flip seat 64 is only the rolling friction occurring on the thrust bearing 62, relative to the connecting screw 61, whether when the sleeve 65 rotates forward or reversely, the sleeve 65 can easily drive the connecting screw 61 to rotate relative to the flip seat 64, thereby avoiding the loosening of the connecting screw 61. Therefore, on the basis of simple structure, this scheme also has the characteristics of high structural reliability.

[0077] As for the matching relationship between the flip seat 64 and the sleeve 65, one end of the sleeve 65 can be directly pressed on the side of the flip seat 64, or the side of the flip seat 64 can act on the step surface of the sleeve 65, and the sleeve 65 has a barrel section extending into the through hole. In the process of screwing the connecting screw 61 into the sleeve 65, the specific screwing depth is controlled by the thrust bearing 62: the gasket at one end of the thrust bearing 62 is supported on the flip seat 64, and the nail cap end is supported by the gasket at the other end of the thrust bearing 62.

[0078] Preferably, in order to keep the connecting screw 61 and the thrust bearing 62 in an ideal matching relationship for a long time, it is set that a groove matching with the gasket of the thrust bearing 62 is provided on the flip seat 64, and a groove matching with the nail cap end is provided on the gasket of the thrust bearing 62. The groove on the flip seat 64 is used to define the position of the thrust bearing 62 in the radial direction of the groove, and the groove on the gasket is used to define the position of the nail cap end in the radial direction of the groove. This can effectively avoid the contact between the rod section of the connecting screw 61 and the gasket on the thrust bearing 62 near the flip seat 64 and the contact between the rod section and the retainer of the thrust bearing 62 due to the lateral displacement of the thrust bearing 62. Further, the sleeve 65 has the step surface and has a barrel section embedded in the through hole, so as to contact the hole wall of the through hole through the side wall of the sleeve 65, and avoid the direct contact between the rod section and the flip seat 64.

[0079] Preferably, in order to maintain a tight fit between the connecting screw 61 and the sleeve 65, the axial force between the connecting screw 61 and the sleeve 65 can be maintained by an additional elastic pad, which can be arranged between the thrust bearing 62 and the flip seat 64, or between the thrust bearing 62 and the nail cap end.

[0080] Preferably, the sleeve 65 is in the shape of a stepped shaft, and one end of the sleeve 65 connected to the connecting screw 61 is embedded in the through hole, and the flip seat 64 is clamped between the shaft shoulder on the sleeve 65 and the end of the thrust bearing 62. This scheme is a technical scheme proposed above, which constrains the flip seat 64 at one end of the sleeve 65 in the axial direction by forming a stepped surface on the sleeve 65, and avoids direct contact between the connecting screw 61 rod section and the flip seat 64 by embedding the sleeve 65 in the through hole. Since the sleeve 65 rotates synchronously as a whole when a torque is applied to the sleeve 65, the friction between the sleeve 65 and the flip seat 64 is easy to overcome and will not cause other adverse effects. The preferred application is that the outer diameter of the through hole is consistent with the inner diameter of the through hole to avoid the sleeve 65 having a shaking gap relative to the flip seat 64 in its radial direction.

[0081] Embodiment 5:

[0082] This embodiment is further refined on the basis of Embodiment 4:

[0083] The flip seat 64 is connected to a first rolling bearing 63 whose axis is perpendicular to the axis of the sleeve 65, and the screw rod 66 is connected to a second rolling bearing 68 whose axis is perpendicular to the axis of the sleeve 65;

[0084] The articulated connection is achieved by the first rolling bearing 63 and the second rolling bearing 68:

[0085] The flip seat 64 is hingedly connected to the second plate body 2 through the first rolling bearing 63, and the screw rod 66 is hingedly connected to the first plate body 4 through the second rolling bearing 68. In this solution, by adopting the first rolling bearing 63 and the second rolling bearing 68, the flipping of the angle adjustment component 6 relative to the mounting seat during the extension and shortening process can occur at the corresponding rolling bearing position, especially when the angle adjustment component 6 is subjected to a large load, the first rolling bearing 63 and the second rolling bearing 68 roll in a manner of bearing radial force, which can not only avoid the angle adjustment component 6 from being greatly worn during repeated use, but also enable this solution to maintain the matching accuracy of the angle adjustment component 6 and the mounting seat for a long time, and at the same time, the corresponding flipping occurs flexibly, which is beneficial to the angle adjustment accuracy of the pump head 5. In specific implementation, the corresponding bearing seats can be installed on the first plate body 4 and the second plate body 2 respectively, and the preferred application is to adopt the following method of setting the first slot body 8 and the second slot body 7.

[0086] Embodiment 6:

[0087] This embodiment is further refined on the basis of Embodiment 5:

[0088] The first plate body 4 is provided with a first slot body 8, and the second plate body 2 is provided with a second slot body 7;

[0089] The first slot body 8 is a T-slot, and the second slot body 7 is a cross slot;

[0090] The free end of the screw rod 66 and the second rolling bearing 68 are embedded in the first slot body 8, and the nail cap end of the connecting screw 61, the thrust bearing 62, the flip seat 64 and the first rolling bearing 63 are all embedded in the second slot body 7;

[0091] The sleeve 65 is partially exposed in the gap between the first plate body 4 and the second plate body 2. In this solution, the first rolling bearing 63 and the flip seat 64 are embedded in the transverse groove of the second groove body 7, and the longitudinal groove of the second groove body 7 accommodates the sleeve 65, the thrust bearing 62 and the connecting screw 61. When the sleeve 65 moves axially relative to the screw 66 on the axis of the screw 66, the sleeve 65, the flip seat 64 and the thrust bearing 62 flip around the rotation center of the first rolling bearing 63. For the setting form of the first groove body 8, the second rolling bearing 68 is set at the free end of the screw 66, the transverse groove of the first groove body 8 is used to install the second rolling bearing 68, and the longitudinal groove of the first groove body 8 is used to accommodate the screw 66. For the first rolling bearing 63 and the second rolling bearing 68, when they are respectively installed on the first plate body 4 and the second plate body 2 through the corresponding groove bodies, each can constrain its position in the length direction of the first groove body 8 and the second groove body 7 through the end of the corresponding transverse groove on the first groove body 8 and the second groove body 7. Therefore, the first rolling bearing 63 and the second rolling bearing 68 can respectively adopt a simple connection mechanism with the flip seat 64 and the screw 66. For example, the first rolling bearing 63 and the second rolling bearing 68 are both: the inner ring is interference fit with the rotating shaft 67, the corresponding rotating shaft 67 is interference connected with the flip seat 64 or the screw 66, and the outer ring is clamped in the corresponding transverse groove. Since the sleeve 65 partially exposed in the gap has open space on both sides, a wrench snap-on surface can be processed at this position of the sleeve 65, so that a wrench tool can be used to provide torque to the sleeve 65, forcing it to rotate relative to the screw 66, thereby adjusting the length of the angle adjustment assembly 6. Preferably, in the process of rotating the sleeve 65, the sleeve 65 moves relative to the screw 66 along the axis of the screw 66, so a scale mark arranged along the axis of the screw 66 can be provided on the screw 66, so that the position of the end of the sleeve 65 close to the free end of the screw 66 on the scale mark can be used to indicate the length of the angle adjustment assembly 6.

[0092] Embodiment 7:

[0093] This embodiment is further refined on the basis of Embodiment 6:

[0094] It also includes a second cover plate connected to the second plate body 2 by screws and used to close the second slot body 7;

[0095] It also includes a first cover plate connected to the first plate body 4 by screws and used to close the first slot body 8. In this solution, the second cover plate is used to prevent the flip seat 64 and the first rolling bearing 63 from falling out of the second slot body 7, and the first cover plate is used to prevent the second rolling bearing 68 from falling out of the first slot body 8, so as to improve the reliability of this structure.

[0096] Embodiment 8:

[0097] This embodiment provides a rotary piston pump in Embodiment 1, including a pump head 5 and a driving mechanism 1, and also including the pump head assembly described in Embodiment 1, wherein the driving mechanism 1 is mounted on the second plate body 2, and the pump head 5 is mounted on the first plate body 4. This scheme is a rotary piston pump including the pump head assembly, and as described above, when the posture of the second plate body 2 in space remains unchanged, by adjusting the length of the angle adjustment assembly 6 and utilizing the force of the angle adjustment assembly 6 on the first plate body 4 and the second plate body 2, the angle of the axis of the pump head 5 relative to the axis of the driving mechanism 1 can be adjusted, thereby achieving the purpose of adjusting the fluid flow output by one action process of the pump head 5.

[0098] Embodiment 9:

[0099] This embodiment is further refined on the basis of Embodiment 8:

[0100] The number of the pump heads 5 is greater than or equal to 2, and each pump head 5 is connected to the drive mechanism 1 through a gear transmission mechanism. This scheme is a technical scheme that can adjust the flow output of the rotary piston pump at each moment by controlling the phase difference between the pump heads 5. At the same time, it is a scheme that uses the drive mechanism 1 as a common power source, and makes each pump head 5 work synchronously through the gear transmission mechanism, so that the flow output of the rotary piston pump is more stable. When these pump heads 5 are used to output the same fluid, the rotary piston pump can be configured as a constant flow pump with uniform flow output at each moment. When these pump heads 5 are used to synchronously output different fluids, these fluids can be output at a constant ratio under the action of the drive mechanism 1, so that the rotary piston pump is suitable for batching and mixing.

[0101] Embodiment 10:

[0102] This embodiment is further refined on the basis of Embodiment 8:

[0103] The first plate body 4 and the second plate body 2 are both rectangular parallelepiped structures, the connection positions of the elastic bend 3 on the first plate body 4 and the second plate body 2 are both located on their respective length sides, the angle adjustment components 6 are arranged at intervals in the length direction of the first plate body 4, and the angle adjustment components 6 are arranged at intervals in the length direction of the second plate body 2;

[0104] In the height direction of the mounting seat, the elastic bend 3 is arranged at the bottom end of the mounting seat, and the angle adjustment component 6 is arranged at the upper end of the mounting seat;

[0105] The pump heads 5 are arranged at the upper end of the first plate body 4 and are arranged at intervals along the length direction of the first plate body 4. This solution is a solution that facilitates adjusting the angle of the pump head 5 through the angle adjustment component 6: the angle of the pump head 5 is adjusted by operating the angle adjustment component 6 at the upper end of the mounting seat; at the same time, this solution provides a technical solution in which the elastic bend 3 and the angle adjustment component 6 are arranged at the opposite end of the mounting seat; at the same time, this solution provides a technical solution in which the angles of the pump heads 5 can be changed synchronously in the process of reasonably configuring the angle adjustment components 6.

[0106] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary piston pump head assembly, comprising a mounting base for mounting a driving mechanism (1) and a pump head (5), wherein the mounting base comprises a second plate body (2) with an adjustable angle and a first plate body (4), characterized in that: The second plate body (2) is connected to the first plate body (4) via an elastic bend (3), and further comprises an angle adjustment component (6) with adjustable length, one end of the angle adjustment component (6) being hingedly connected to the second plate body (2) and the other end being hingedly connected to the first plate body (4); The number of the angle adjustment components (6) is greater than or equal to 2.

2. The rotary piston pump head assembly according to claim 1, characterized in that: The mounting seat is an integral structure formed by the second plate body (2), the first plate body (4) and the elastic bend (3), and the two ends of the elastic bend (3) are: one end is connected to the bottom end of the first plate body (4), and the other end is connected to the bottom end of the second plate body (2); The two ends of the angle adjustment component (6) are: one end is connected to the upper end of the second plate body (2), and the other end is connected to the upper end of the first plate body (4).

3. The rotary piston pump head assembly according to claim 1 or 2, characterized in that: The number of the angle adjustment components (6) is greater than or equal to 3, and in the length direction of the mounting seat, angle adjustment components (6) are provided at both ends and the middle of the mounting seat.

4. The rotary piston pump head assembly according to claim 1, characterized in that: The angle adjustment assembly (6) comprises a connecting screw (61), a thrust bearing (62), a flip seat (64), a sleeve (65) and a screw rod (66); The connecting screw (61) is threadedly connected to one end of the sleeve (65), and the screw rod (66) is threadedly connected to the other end of the sleeve (65), and the connecting screw (61), the thrust bearing (62), the sleeve (65) and the screw rod (66) are coaxial; The flip seat (64) is provided with a through hole, and a structure formed by the connecting screw (61) and the sleeve (65) passes through the through hole, and the nail cap end of the connecting screw (61) and the end of the sleeve (65) for connecting with the screw rod (66) are both located outside the flip seat (64); The thrust bearing (62) is sleeved on the structure and clamped between the nail cap end and the flip seat (64), and the flip seat (64) is clamped between the thrust bearing (62) and the sleeve (65); The sleeve (65) can rotate relative to the flip seat (64) around the axis of the sleeve (65); One of the flip seat (64) and the screw rod (66) is hingedly connected to the first plate body (4), and the other is hingedly connected to the second plate body (2).

5. The rotary piston pump head assembly according to claim 4, characterized in that: The flip seat (64) is connected to a first rolling bearing (63) whose axis is perpendicular to the axis of the sleeve (65), and the screw rod (66) is connected to a second rolling bearing (68) whose axis is perpendicular to the axis of the sleeve (65); The hinged connection is achieved by means of the first rolling bearing (63) and the second rolling bearing (68): The flip seat (64) is hingedly connected to the second plate body (2) via a first rolling bearing (63), and the screw rod (66) is hingedly connected to the first plate body (4) via a second rolling bearing (68).

6. The rotary piston pump head assembly according to claim 5, characterized in that: The first plate body (4) is provided with a first groove body (8), and the second plate body (2) is provided with a second groove body (7); The first slot body (8) is a T-slot, and the second slot body (7) is a cross slot; The free end of the screw rod (66) and the second rolling bearing (68) are embedded in the first groove body (8), and the nail cap end of the connecting screw (61), the thrust bearing (62), the turning seat (64) and the first rolling bearing (63) are all embedded in the second groove body (7); The sleeve (65) is partially exposed in the gap between the first plate body (4) and the second plate body (2).

7. The rotary piston pump head assembly according to claim 6, characterized in that: It also includes a second cover plate connected to the second plate body (2) by screws and used to close the second slot body (7); It also comprises a first cover plate connected to the first plate body (4) by means of screws and used to close the first slot body (8).

8. A rotary piston pump, comprising a pump head (5) and a drive mechanism (1), characterized in that: It also comprises a pump head assembly according to any one of claims 1 to 7, wherein the drive mechanism (1) is mounted on the second plate body (2), and the pump head (5) is mounted on the first plate body (4).

9. The rotary piston pump according to claim 8, characterized in that The number of the pump heads (5) is greater than or equal to 2, and each pump head (5) is transmission-connected to the drive mechanism (1) via a gear transmission mechanism.

10. The rotary piston pump according to claim 8, characterized in that The first plate body (4) and the second plate body (2) are both rectangular parallelepiped structures; the connection positions of the elastic bend (3) on the first plate body (4) and the second plate body (2) are both located on the length edges of the respective plates; the angle adjustment components (6) are arranged at intervals in the length direction of the first plate body (4); and the angle adjustment components (6) are arranged at intervals in the length direction of the second plate body (2); In the height direction of the mounting seat, the elastic bend (3) is arranged at the bottom end of the mounting seat, and the angle adjustment component (6) is arranged at the upper end of the mounting seat; The pump heads (5) are arranged at the upper end of the first plate body (4) and are arranged at intervals along the length direction of the first plate body (4).

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