CN214577684U - Metering pump - Google Patents

Abstract

The utility model relates to a metering pump, which comprises a housin, the pump head is connected to casing one side, install import check valve subassembly and export check valve subassembly on the pump head, be equipped with diaphragm assembly in the pump head, casing upper portion installation motor, be equipped with the turbine in the casing, the worm, be equipped with the connecting rod that can slide around in the casing, the connecting rod is located diaphragm assembly rear and is used for driving its motion, the main shaft slides the cooperation and synchronous rotation along its axial with the turbine, be provided with oblique guide pillar on the main shaft, be equipped with on the connecting rod and supply oblique guide pillar to insert the cavity of establishing, the cavity slope sets up backward, oblique guide pillar slides and sets up and can drive the connecting rod back-and-forth movement with the cavity cooperation in the cavity, be equipped with the stroke adjustment handle that can drive the main shaft horizontal slip on the casing, thereby oblique guide pillar can drive the connecting rod at the cavity internal rotation and do the front-back and-up and-down slide. The utility model provides a metering pump slides around guide pillar rotation drive connecting rod to one side, and stroke adjustment handle drive main shaft horizontal slip adjusts the contact position of guide pillar to one side and connecting rod, simple structure, convenient operation.

Description

Metering pump

Technical Field

The utility model relates to a metering pump.

Background

The metering pump is quite widely applied in the related fields of petrifaction, chemical engineering, electric power and the like. Most of the existing metering pumps convert the rotation motion of a turbine into the linear reciprocating motion of a connecting rod through the matching of an eccentric cam and a return spring, and the contact between the eccentric cam and the connecting rod is adjusted by controlling the position of the return spring through a stroke adjusting handle, so that the stroke length of the pump is adjusted, the operation is complex, the size of the metering pump is large, and the installation is inconvenient; the one-way valve assembly and the outlet one-way valve assembly are complex in structure, inconvenient to install and easy to accumulate media.

Disclosure of Invention

The utility model aims at: in order to overcome prior art's defect, the utility model provides a metering pump rotates the drive connecting rod through the guide pillar to one side and slides around, and the guide pillar to one side is fixed with the main shaft, adjusts the contact position of guide pillar to one side and connecting rod through stroke adjustment handle direct drive main shaft horizontal slip to the stroke length of governing pump, its connection structure is simple, and convenient operation still can reduce the installation volume of metering pump, check valve subassembly and export check valve subassembly simple to operate, and the medium velocity of flow is fast.

The technical scheme of the utility model: a metering pump comprises a shell, wherein one side of the shell is connected with a pump head, an inlet check valve assembly and an outlet check valve assembly are installed on the pump head, a diaphragm assembly is arranged in the pump head, a motor is installed at the upper part of the shell, a turbine and a worm meshed with the turbine are arranged in the shell, the motor drives the worm to rotate, a connecting rod capable of sliding back and forth is further arranged in the shell, the connecting rod is located behind the diaphragm assembly and used for driving the diaphragm assembly to move, a main shaft is arranged in the shell, the main shaft and the turbine are in sliding fit along the axial direction and rotate synchronously, an inclined guide post is fixedly or integrally arranged on the main shaft, a concave cavity for the inclined guide post to be inserted is formed in the connecting rod, the concave cavity is arranged obliquely and backwards, the inclined guide post is arranged in the concave cavity in a sliding manner and matched with the concave cavity to drive the connecting rod to move back and forth, a stroke adjusting handle capable of driving the main shaft to slide left and right is arranged on the shell, and the inclined guide post can rotate in the concave cavity to drive the connecting rod to slide back and forth, the inlet check valve assembly and the outlet check valve assembly respectively comprise a valve body, the valve body is provided with an upper port and a lower port, a valve seat and a valve ball are arranged in the valve body, the valve seat is arranged at the lower port of the valve body and is provided with a valve port matched with the valve ball, the lower part of the valve port is arranged in a conical shape, the upper port of the valve body is also arranged in a conical shape, a connecting pipeline assembly is further arranged at one end of the valve body, which is far away from the pump head, and comprises a gland and a threaded joint, one end of the gland is sleeved with the outside of the valve body, the other end of the gland is sleeved with the outside of the threaded joint, a separation blade is arranged at the periphery of the threaded joint, and a limit sheet for pressing the separation blade against the end surface of the valve body is arranged on the inner ring of the gland.

By adopting the technical scheme, the inclined guide post is fixed with the main shaft, the main shaft is directly driven by the stroke adjusting handle to slide left and right to adjust the contact position of the inclined guide post and the connecting rod, so that the stroke length of the pump is adjusted, after the stroke length is adjusted, the worm is driven by the motor to rotate, the worm wheel meshed with the worm rotates, so that the inclined guide post is driven to synchronously rotate along with the main shaft, the inclined guide post rotates in the cavity to drive the connecting rod to slide back and forth, the diaphragm assembly starts to move backwards during a suction stroke, the pressure in the pump head is reduced, when the pressure in the pump head is lower than the pressure in a suction pipeline, the valve ball of the inlet one-way valve assembly upwards leaves the valve seat to expose the valve port, a medium in the inlet pipeline enters the cavity of the pump head, when the suction stroke is finished, the diaphragm assembly stops moving instantly, the pressure in the pump head is the same as the pressure in the inlet pipeline, and the valve ball resets; during the discharge stroke, the diaphragm assembly starts to move forwards, the pressure in the pump head rises, when the pressure in the pump head is higher than the pressure in the outlet pipeline, the valve ball of the outlet one-way valve assembly leaves the valve seat upwards, so that the valve port is exposed, the medium in the pump head enters the liquid outlet pipeline, when the discharge stroke is finished, the diaphragm assembly stops instantly again, the pressure in the pump head is the same as the pressure in the outlet pipeline, the valve ball resets, and then the next cycle starts.

The driving structure of above-mentioned measuring pump simple structure, convenient operation, and the slope through oblique guide pillar sets up, and eccentricity when its rotates is the twice of original eccentric cam, and the displacement distance of multiplicable connecting rod when oblique guide pillar rotates a week to increase stroke length, improved work efficiency and the performance of measuring pump greatly, in order to reach the effect that reduces the installation volume of measuring pump, and it is convenient to adjust stroke length through stroke adjustment handle.

The check valve assembly is structurally simple, the upper port and the valve port of the valve body are both in conical arrangement, so that a medium can flow from bottom to top conveniently, and the connecting pipeline is convenient to disassemble and assemble.

The utility model discloses a further setting again: the upper end of the outlet one-way valve assembly is connected with the connecting pipeline assembly, an upper sealing ring I is arranged between a limiting piece of the connecting pipeline assembly and the upper end face of the valve body, an upper sealing ring II is arranged between the lower end face of the valve body and the lower end face of the pump head of the inlet one-way valve assembly, the lower end of the inlet one-way valve assembly is connected with the connecting pipeline assembly, and a lower sealing ring II is arranged between the valve seat and the inner peripheral face of the valve body and is abutted against the upper end face of the limiting piece of the connecting pipeline assembly.

Adopt above-mentioned further setting again, upper seal circle and lower sealing washer set up and contradict with the screwed joint at the upper portion and the lower part of valve body pump head respectively and form sealedly for prevent the entering of external medium, it is sealed effectual.

The utility model discloses a further setting again: the diaphragm subassembly include the membrane group and locate the outside diaphragm of membrane group, the outer circumference inturn of diaphragm is equipped with the stabilizer blade, pump head one side is equipped with the diaphragm support ring, and the support ring is installed on the pump head through the screw, the inclined plane that diaphragm support ring inner circle and stabilizer blade contradict.

By adopting the above further arrangement, the diaphragm assembly is simple in structure and convenient to disassemble, assemble and replace.

The utility model discloses a further setting again: the turbine is rotatably arranged on the mounting frame, and one side of the mounting frame, which corresponds to the connecting rod, is provided with a containing cavity for the left side of the inclined guide post to be separated from the concave cavity.

By adopting the above further arrangement, the turbine mounting structure is simple, the accommodating cavity for the inclined guide pillar to be separated from the concave cavity on the left side can be arranged, and the space layout is reasonable.

The utility model discloses a further setting again: and the shell is also provided with a locking piece for locking the stroke adjusting handle.

Adopt above-mentioned further setting again, lock the stroke adjustment handle after the regulation through the retaining member to avoid at the during operation, stroke adjustment handle drive main shaft slides, influences the stroke length that has set for.

The utility model discloses a further setting again: the pump head sets up at the casing front end and corresponds the connecting rod setting, and stroke adjustment handle is located the casing right-hand member and corresponds the main shaft setting.

Adopt above-mentioned further setting again, casing simple structure, the installation of pump head and stroke adjustment handle of being convenient for to the part work that the drive corresponds.

The utility model discloses a further setting again: the shell and the pump head are sealed through an oil seal.

By adopting the above further arrangement, the sealing performance between the pump head and the shell is high.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention, wherein arrow a indicates a forward direction, arrow b indicates a right direction, and arrow c indicates an upward direction;

fig. 2 is a diagram of the internal structure of the housing, with a pump head stroke of 0% in an embodiment of the invention, wherein arrow a1 indicates the direction to the front and arrow b1 indicates the direction to the right;

FIG. 3 is a view of the internal structure of the housing, the maximum suction stroke of the pump head, according to an embodiment of the present invention;

FIG. 4 is a diagram of the internal structure of the housing, with the maximum discharge stroke of the pump head, according to an embodiment of the present invention;

FIG. 5 is a block diagram of a pump head according to an embodiment of the present invention;

FIG. 6 is an assembly view of the valve body and connecting line assembly according to an embodiment of the present invention;

FIG. 7 is a block diagram of an outlet check valve assembly according to an embodiment of the present invention;

fig. 8 is a block diagram of an inlet check valve assembly according to an embodiment of the present invention.

The device comprises a shell 100, a pump head 200, an inlet check valve assembly 210, an outlet check valve assembly 220, a diaphragm assembly 300, a motor 400, a worm wheel 510, a worm 520, a connecting rod 600, a main shaft 700, an inclined guide post 710, a concave cavity 610, a stroke adjusting handle 800, a mounting frame 110, a containing cavity 111 and a locking member 820;

the valve comprises a valve body 230, an upper port 231, a lower port 232, a valve seat 240, a valve ball 250, a valve port 241, a connecting pipeline assembly 260, a gland 261, a threaded joint 262, a baffle 2621, a limiting piece 2611, a lower sealing ring I271, an upper sealing ring I272, an upper sealing ring II 281 and a lower sealing ring II 282;

the membrane group 310, the membrane 320, the support leg 321, the membrane support ring 900, the screw 910 and the inclined plane 920.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indications (such as up, down, front, and back … …) in the description of the present invention are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

As shown in fig. 1-8, the metering pump of the present invention comprises a housing 100, one side of the housing 100 is connected to a pump head 200, an inlet check valve assembly 210 and an outlet check valve assembly 220 are mounted on the pump head 200, a diaphragm assembly 300 is disposed in the pump head 200, a motor 400 is mounted on the upper portion of the housing 100, a worm 510 and a worm 520 engaged with the worm 510 are disposed in the housing 100, the motor 400 drives the worm 520 to rotate, a connecting rod 600 capable of sliding back and forth is further disposed in the housing 100, the connecting rod 600 is disposed behind the diaphragm assembly 300 for driving the diaphragm assembly to move, a main shaft 700 is disposed in the housing 100, the main shaft 700 and the worm 510 are in sliding fit and synchronous rotation along the axial direction thereof, an oblique guide post 710 is fixedly or integrally disposed on the main shaft 700, a cavity 610 for the oblique guide post 710 to be inserted is disposed on the connecting rod 600, the oblique guide post is disposed obliquely backwards, the oblique guide post 710 is slidably disposed in the cavity 610 and is engaged with the cavity 610 to drive the connecting rod 600 to move back and forth, a stroke adjusting handle 800 capable of driving the main shaft 700 to slide left and right is arranged on the housing 100, and the inclined guide post 710 can rotate in the concave cavity 610 to drive the connecting rod 600 to slide back and forth; the inlet check valve assembly 210 and the outlet check valve assembly 220 both include a valve body 230, the valve body 230 has an upper port 231 and a lower port 232, a valve seat 240 and a valve ball 250 are arranged in the valve body 230, the valve seat 240 is arranged at the lower port 232 of the valve body 230 and has a valve port 241 matched with the valve ball 250, the lower part of the valve port 241 is arranged in a tapered shape, the upper port 231 of the valve body 230 is also arranged in a tapered shape, a connecting pipeline assembly 260 is further arranged at one end of the valve body 230 away from the pump head 200, the connecting pipeline assembly 260 includes a gland 261 and a threaded joint 262, one end of the gland 261 is sleeved with the outside of the valve body 230, the other end of the gland 261 is sleeved with the outside of the threaded joint 262, a separation blade 2621 is arranged at the periphery of the threaded joint 262, and the gland 261 is provided with a limit sheet 2611 for pressing the separation blade 2621 against the end surface of the valve body 230; a lower sealing ring I271 is arranged between the valve seat 240 of the outlet check valve assembly 220 and the inner circumferential surface of the valve body 230, the lower sealing ring I271 is abutted against the upper end surface of the pump head 200, the upper end of the outlet check valve assembly 220 is connected with the connecting pipeline assembly 260, an upper sealing ring I272 is arranged between the limiting sheet 2611 of the connecting pipeline assembly 260 and the upper end surface of the valve body 230, an upper sealing ring II 281 is arranged between the valve body 230 of the inlet check valve assembly 210 and the lower end surface of the pump head 200, the lower end of the inlet check valve assembly 210 is connected with the connecting pipeline assembly 260, a lower sealing ring 282 II is arranged between the valve seat 240 and the inner circumferential surface of the valve body 230, and the lower sealing ring II 282 is abutted against the upper end surface of the limiting sheet 2611 of the connecting pipeline assembly 260; a mounting frame 110 is arranged in the shell 100, the turbine 510 is rotatably mounted on the mounting frame 110, and an accommodating cavity 111 for allowing the inclined guide post 710 to be disengaged from the cavity 610 is arranged on one side of the mounting frame 110 corresponding to the connecting rod 600; a locking member 820 for locking the stroke adjustment handle 800 is further provided on the housing 100; the pump head 200 is disposed at the front end of the housing 100 and corresponds to the connecting rod 600, and the stroke adjustment handle 800 is disposed at the right end of the housing 100 and corresponds to the main shaft 700; the housing 100 and the pump head 200 are sealed via an oil seal.

Specifically, the length of the angle guide post 710 is greater than the length of the cavity 610, so that the angle guide post is prevented from sliding out of the cavity 610.

Specifically, the diaphragm assembly 300 includes a membrane module 310 and a diaphragm 320 disposed outside the membrane module 310, a support leg 321 is disposed on the outer periphery of the diaphragm 320 in an inward bending manner, a diaphragm support ring 900 is disposed on one side of the pump head 200, the support ring 900 is mounted on the pump head 200 via a screw 910, and an inner ring of the diaphragm support ring 900 is abutted to an inclined plane 920 of the support leg 321.

When the stroke is 0%, the left side of the inclined guide post 710 is positioned in the cavity 610 of the connecting rod 600; the main shaft 700 is driven to the left by the stroke adjusting handle 800, the inclined guide post 710 moves to the left synchronously with the main shaft 700, the left side of the inclined guide post 710 is separated from the concave cavity 610 and slides into the accommodating cavity 111, the right side of the inclined guide post 710 slides into the concave cavity 610 to drive the connecting rod 600 to slide backwards, the position adjustment of the stroke length is realized, and the adjusted stroke adjusting handle 800 is locked by the locking piece 820; then, the motor 400 drives the worm 520 to rotate, so that the worm wheel 510 meshed with the worm 520 rotates, the inclined guide post 710 is driven to synchronously rotate along with the main shaft 700, and the connecting rod 600 slides back and forth in a reciprocating manner by matching the right side of the inclined guide post 710 with the cavity 610; on the intake stroke, the diaphragm assembly 300 starts to move backwards, the pressure in the pump head 200 decreases, when the pressure in the pump head 200 is lower than the pressure in the suction line, the valve ball 250 of the inlet check valve assembly 210 moves upwards away from the valve seat 240, so that the valve port 241 is exposed, the medium in the inlet line enters the chamber of the pump head 200, when the intake stroke is finished, the movement of the diaphragm assembly 300 stops instantaneously, the pressure in the pump head 200 is the same as the pressure in the inlet line, and the valve ball 250 resets; on the discharge stroke, the diaphragm assembly 300 starts to move forward, the pressure in the pump head 200 rises, when the pressure in the pump head 200 is higher than the outlet line pressure, the valve ball 250 of the outlet check valve assembly 220 moves upward away from the valve seat 240, exposing the valve port 241, the medium in the pump head 200 enters the outlet line, when the discharge stroke ends, the diaphragm assembly 300 stops momentarily again, the pressure in the pump head 200 is the same as the pressure in the outlet line, the valve ball 250 resets, and the next cycle starts.

The driving structure of above-mentioned measuring pump simple structure, convenient operation, and the slope through oblique guide pillar 710 sets up, and eccentricity when it rotates is the twice of original eccentric cam, and guide pillar 710 rotates the displacement distance of multiplicable connecting rod 600 when a week to one side to increase stroke length, improved work efficiency and the performance of measuring pump greatly, in order to reach the effect that reduces the installation volume of measuring pump, and it is convenient to adjust stroke length through stroke adjustment handle.

The check valve assembly is structurally simple, the upper port and the valve port of the valve body are both in conical arrangement, so that a medium can flow from bottom to top conveniently, and the connecting pipeline is convenient to disassemble and assemble.

The upper sealing ring and the lower sealing ring are arranged on the upper portion and the lower portion of the valve body and are abutted against the pump head and the threaded connector respectively to form sealing, external media are prevented from entering the valve body, and the sealing effect is good.

The diaphragm assembly 300 is simple in structure and convenient to disassemble, assemble and replace, and the inclined plane 920 of the diaphragm support ring 900 is abutted against the support leg 321 of the diaphragm 320 to form positioning and installation of the diaphragm assembly 300.

Claims (7)

1. The utility model provides a metering pump, includes the casing, the pump head is connected to casing one side, and export check valve subassembly and import check valve subassembly are installed respectively to the upper and lower both ends of pump head, are equipped with diaphragm assembly in the pump head, casing upper portion installation motor, be equipped with the turbine in the casing, with the worm of turbine meshing, the motor drive worm rotates, still be equipped with the connecting rod that can slide around in the casing, the connecting rod is located diaphragm assembly rear and is used for driving its motion, its characterized in that: the main shaft is arranged in the shell and is in sliding fit with the turbine along the axial direction of the main shaft and synchronously rotates, an inclined guide post is fixedly or integrally arranged on the main shaft, a concave cavity for the inclined guide post to be inserted is formed in the connecting rod, the concave cavity is arranged obliquely backwards, the inclined guide post is arranged in the concave cavity in a sliding way and is matched with the concave cavity to drive the connecting rod to move back and forth, a stroke adjusting handle capable of driving the main shaft to slide left and right is arranged on the shell, the inclined guide post can rotate in the concave cavity to drive the connecting rod to slide back and forth, the inlet check valve component and the outlet check valve component both comprise a valve body, the valve body is provided with an upper port and a lower port, a valve seat and a valve ball are arranged in the valve body, the valve seat is arranged at the lower port of the valve body and is provided with a valve port matched with the valve ball, the lower part of the valve port is arranged in a conical shape, and one end of the valve body, which is far away from the pump head, is also provided with a connecting pipeline component, the connecting pipeline assembly comprises a gland and a threaded connector, one end of the gland is sleeved with the outside of the valve body, the other end of the gland is sleeved with the outside of the threaded connector, the periphery of the threaded connector is provided with a separation blade, and the inner ring of the gland is provided with a limiting sheet which is used for abutting against the separation blade to press on the end face of the valve body.

2. A dosing pump according to claim 1, characterized in that: the upper end of the outlet one-way valve assembly is connected with the connecting pipeline assembly, an upper sealing ring I is arranged between a limiting piece of the connecting pipeline assembly and the upper end face of the valve body, an upper sealing ring II is arranged between the lower end face of the valve body and the lower end face of the pump head of the inlet one-way valve assembly, the lower end of the inlet one-way valve assembly is connected with the connecting pipeline assembly, and a lower sealing ring II is arranged between the valve seat and the inner peripheral face of the valve body and is abutted against the upper end face of the limiting piece of the connecting pipeline assembly.

3. A dosing pump according to claim 1 or 2, characterized in that: the diaphragm subassembly include the membrane group and locate the outside diaphragm of membrane group, the outer circumference inturn of diaphragm is equipped with the stabilizer blade, pump head one side is equipped with the diaphragm support ring, and the support ring is installed on the pump head through the screw, the inclined plane that diaphragm support ring inner circle and stabilizer blade contradict.

4. A dosing pump according to claim 1 or 2, characterized in that: the turbine is rotatably arranged on the mounting frame, and one side of the mounting frame, which corresponds to the connecting rod, is provided with a containing cavity for the left side of the inclined guide post to be separated from the concave cavity.

5. A dosing pump according to claim 1 or 2, characterized in that: and the shell is also provided with a locking piece for locking the stroke adjusting handle.

6. A dosing pump according to claim 1 or 2, characterized in that: the pump head sets up at the casing front end and corresponds the connecting rod setting, and stroke adjustment handle is located the casing right-hand member and corresponds the main shaft setting.

7. A dosing pump according to claim 1 or 2, characterized in that: the shell and the pump head are sealed through an oil seal.

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