CN220319739U - Reciprocating metering pump - Google Patents
Reciprocating metering pump Download PDFInfo
- Publication number
- CN220319739U CN220319739U CN202321853447.4U CN202321853447U CN220319739U CN 220319739 U CN220319739 U CN 220319739U CN 202321853447 U CN202321853447 U CN 202321853447U CN 220319739 U CN220319739 U CN 220319739U
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- Prior art keywords
- pump head
- annular portion
- cavity
- annular
- diaphragm body
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- 239000007788 liquid Substances 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
Abstract
The utility model discloses a reciprocating metering pump, wherein a first annular groove is formed in the rear side surface of a front pump head, a second annular groove is formed in the front side surface of a rear pump head, a diaphragm comprises a diaphragm body, a first annular part, a second annular part and a third annular part, the inner periphery of the first annular part is connected with the outer periphery of the diaphragm body, the first annular part extends along the radial direction of the diaphragm body, the second annular part is arranged on one surface of the first annular part, the third annular part is arranged on the other surface of the first annular part, the second annular part and the third annular part extend along the axial direction of the diaphragm body, the first annular part is clamped between the front pump head and the rear pump head, the second annular part is arranged in the first annular groove of the front pump head, and the third annular part is arranged in the second annular groove of the rear pump head. The utility model ensures that the diaphragm is fixed firmly.
Description
Technical Field
The utility model relates to the technical field of metering pumps, in particular to a reciprocating metering pump.
Background
The metering pump is also called a constant flow rate pump or a proportional pump, can meet the requirements of various strict technological processes, can realize stepless adjustment of flow rate within a range of 0-100%, is used for conveying liquid (particularly corrosive liquid), is a special volumetric pump, and is a fluid conveying machine. By using a plurality of metering pumps, a plurality of mediums can be input into the process flow according to an accurate proportion for mixing. Due to its own prominence, metering pumps are now widely used in various industrial fields of petrochemical industry, pharmaceutical industry, food industry, and the like.
The diaphragm metering pump is the most common metering pump, and the current diaphragm metering pump comprises a diaphragm, the diaphragm is clamped and fixed between a front pump head and a rear pump head, a driving mechanism drives a piston to reciprocate back and forth in a hydraulic cavity of the rear pump head, hydraulic oil is pushed by the reciprocating motion of the piston, and the hydraulic oil pushes the diaphragm to reciprocate to realize the suction and discharge of media. However, when the existing metering pump works, the diaphragm is required to be continuously stretched and deformed, and the diaphragm is only fixed by clamping the front pump head and the rear pump head, so that the diaphragm is not fixed firmly enough.
Disclosure of Invention
The application provides a reciprocating metering pump which enables a diaphragm to be fixed and stable.
The application provides a reciprocating metering pump, include:
the front pump head is provided with a liquid conveying channel, the rear side surface of the front pump head is provided with a first concave cavity and a first annular groove, the first concave cavity is communicated with the liquid conveying channel, and the first annular groove is arranged around the first concave cavity;
the liquid inlet one-way valve is arranged on the front pump head and is connected with one end of the liquid feeding channel;
the liquid outlet one-way valve is arranged on the front pump head and is connected with the other end of the liquid feeding channel;
the front side of the rear pump head is in sealing connection with the rear side of the front pump head, and the first concave cavity and the second concave cavity are arranged in a butt joint mode;
the piston is movably arranged in the hydraulic cavity;
the driving mechanism is used for driving the piston to reciprocate back and forth in the hydraulic cavity;
the diaphragm comprises a diaphragm body, a first annular portion, a second annular portion and a third annular portion, wherein the diaphragm body is circular, the inner periphery of the first annular portion is connected with the outer periphery of the diaphragm body, the first annular portion extends along the radial direction of the diaphragm body, the second annular portion is arranged on one surface of the first annular portion, the third annular portion is arranged on the other surface of the first annular portion, the second annular portion and the third annular portion extend along the axial direction of the diaphragm body, the diaphragm body is located in a cavity formed by encircling a first cavity and a second cavity, the first annular portion is clamped between a front pump head and a rear pump head, the second annular portion is arranged in a first annular groove of the front pump head, and the third annular portion is arranged in a second annular groove of the rear pump head.
Preferably, the diaphragm body, the first annular portion, the second annular portion and the third annular portion are integrally formed.
Preferably, the second annular part is clamped and arranged in the first annular groove of the front pump head, and the third annular part is clamped and arranged in the second annular groove of the rear pump head.
Preferably, the bottom surfaces of the first concave cavity and the second concave cavity are spherical.
Preferably, the bottom surface of the first cavity is communicated with the liquid feeding channel through a plurality of first through holes, and the bottom surface of the second cavity is communicated with the hydraulic cavity through a plurality of second through holes.
Preferably, the reciprocating metering pump further comprises a movable part, the movable part comprises a movable rod and a supporting plate, the movable rod is arranged in a first through hole close to the center of the rear side face of the front pump head in a telescopic mode, the supporting plate is vertically connected with one end of the movable rod, the supporting plate is located in the first concave cavity and is used for supporting the diaphragm body, the movable rod is sleeved with a pressure spring, one end of the pressure spring abuts against the bottom face of the first concave cavity, and the other end of the pressure spring abuts against one surface of the supporting plate, which is away from the diaphragm body.
One or more technical solutions provided in the present application have at least the following technical effects or advantages:
the reciprocating metering pump of this application is provided with first annular groove on the trailing flank of preceding pump head, be provided with the second annular groove on the leading flank of back pump head, and the diaphragm includes the diaphragm body, first annular portion, second annular portion and third annular portion, the inner periphery of first annular portion is followed along being connected with the periphery of diaphragm body, the radial direction of diaphragm body is followed to first annular portion extends, second annular portion sets up on one surface of first annular portion, third annular portion sets up on another surface of first annular portion, second annular portion and third annular portion all extend along the axial direction of diaphragm body, first annular portion centre gripping is between preceding pump head and back pump head, second annular portion sets up in the first annular groove of preceding pump head, third annular portion sets up in the second annular groove of back pump head, like this, through the connection of the first annular groove of second annular portion and preceding pump head, the connection of third annular portion and back pump head, thereby make diaphragm and preceding pump head between the axial direction of back pump head extend, the diaphragm is firm more firmly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of the present utility model;
fig. 2 is a cross-sectional view of a septum.
Detailed Description
As shown in fig. 1 and 2, the reciprocating metering pump of this embodiment comprises a front pump head 10, a liquid inlet check valve 20, a liquid outlet check valve 30, a rear pump head 40, a piston 50, a driving mechanism and a diaphragm 60
The front pump head 10 is provided with a liquid feeding channel 11, the rear side surface of the front pump head 10 is provided with a first concave cavity 12 and a first annular groove, the first concave cavity 12 is communicated with the liquid feeding channel 11, and the first annular groove is arranged around the first concave cavity 12, that is to say, the first concave cavity 12 is in the range enclosed by the first annular groove.
The bottom surface of first cavity 12 is spherical for diaphragm 60 can be better receive the support of the bottom surface of first cavity 12 after the forward deformation, and the bottom surface of first cavity 12 is linked together with send liquid passageway 11 through a plurality of first through-holes 121, and a plurality of first through-holes 121 evenly distributed set up, make and send communicating between liquid passageway 11 and the first cavity 12 more smooth and easy.
The liquid inlet one-way valve 20 is arranged on the front pump head 10 and is connected with one end of the liquid feeding channel 11, and the liquid inlet one-way valve 20 is used for connecting a liquid inlet pipeline.
The liquid outlet one-way valve 30 is installed on the front pump head 10 and connected with the other end of the liquid feeding channel 11, and the liquid outlet one-way valve 30 is used for connecting a liquid outlet pipeline.
The rear pump head 40 is provided with a hydraulic cavity 41, the front side surface of the rear pump head 40 is provided with a second concave cavity 42 and a second annular groove, the second concave cavity 42 is communicated with the hydraulic cavity 41, the second annular groove is arranged around the second concave cavity 42, the rear pump head 40 and the front pump head 10 are connected through a plurality of bolts, the front side surface of the rear pump head 40 is in sealing connection with the rear side surface of the front pump head 10, the first concave cavity 12 and the second concave cavity 42 are arranged in a closing mode, and the first concave cavity 12 and the second concave cavity 42 are enclosed to form a cavity.
The bottom surface of the second cavity 42 is spherical, so that the diaphragm 60 can be better supported by the bottom surface of the second cavity 42 after being deformed backward, the bottom surface of the second cavity 42 is communicated with the hydraulic cavity 41 through a plurality of second through holes 421, and the plurality of second through holes 421 are uniformly distributed, so that the communication between the hydraulic cavity 41 and the second cavity 42 is smoother.
The piston 50 is movably arranged in the hydraulic chamber 41, and the hydraulic chamber 41 is filled with hydraulic oil, that is, the space between the diaphragm 60 and the piston 50 is filled with hydraulic oil.
The drive mechanism is used to drive the piston 50 back and forth in the hydraulic chamber 41.
The diaphragm 60 comprises a diaphragm body 61, a first annular portion 62, a second annular portion 63 and a third annular portion 64, the diaphragm body 61, the first annular portion 62, the second annular portion 63 and the third annular portion 64 are integrally formed, the diaphragm body 61 is circular, the inner periphery of the first annular portion 62 is connected with the outer periphery of the diaphragm body 61, the first annular portion 62 extends along the radial direction of the diaphragm body 61, the second annular portion 63 is arranged on one surface of the first annular portion 62, the second annular portion 63 is perpendicular to the first annular portion 62, the third annular portion 63 is arranged on the other surface of the first annular portion 62, the third annular portion 63 is perpendicular to the first annular portion 62, the second annular portion 63 and the third annular portion 64 extend along the axial direction of the diaphragm body 61, the diaphragm body 61 is located in a cavity formed by encircling the first cavity 12 and the second cavity 42, the first annular portion 62 is clamped between the front pump head 10 and the rear pump head 40, the second annular portion 63 is clamped in a first annular groove of the front pump head 10, the third annular portion 63 is clamped in a third annular portion 64 is clamped in a second annular groove of the front pump head 10, and the third annular portion 64 is clamped in the second annular groove of the front pump head 40, and is connected with the second annular portion 40, and the front pump head 10 is further firmly connected with the second annular portion 40, and the front pump head 60 is further connected with the third annular portion 40, and the front pump head 60 is further firmly connected with the front annular portion and the front pump head 40, and the front pump head is further firmly connected with the front pump head and the pump head is provided.
The reciprocating metering pump further comprises a movable member 70, the movable member 70 comprises a movable rod 71 and a supporting plate 72, the movable rod 71 and the supporting plate 72 are integrally formed, the movable rod 71 is telescopically arranged in a first through hole 121 near the center of the rear side face of the front pump head 10, the supporting plate 72 is vertically connected with one end of the movable rod 71, the supporting plate 72 is located in the first concave cavity 12, the supporting plate 72 is close to one surface of the diaphragm body 61, when the diaphragm body 61 deforms forwards, the supporting plate 72 is used for supporting the diaphragm body 61, a pressure spring 80 is sleeved on the movable rod 71, one end of the pressure spring 80 is abutted against the bottom face of the first concave cavity 12, the other end of the pressure spring 80 is abutted against one surface of the supporting plate 72, which faces away from the diaphragm body 61, so that when the diaphragm body 61 deforms forwards, the supporting plate 72 supports the diaphragm body 61, and the movable rod 71 slides forwards in the first through hole 121, and the pressure spring 80 is slowly compressed at the moment, so that the speed of the forward deformation of the diaphragm body 61 can be slowed down, and the diaphragm body is prevented from being deformed too fast and broken.
The foregoing description of the preferred embodiments of the present application is not intended to limit the utility model to the particular embodiments of the present application, but to limit the scope of the utility model to the particular embodiments of the present application.
The specification and drawings are merely exemplary of the application and are to be regarded as covering any and all modifications, variations, combinations, or equivalents that are within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the present application and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (6)
1. A reciprocating metering pump, comprising:
the front pump head (10) is provided with a liquid conveying channel (11), the rear side surface of the front pump head (10) is provided with a first concave cavity (12) and a first annular groove, the first concave cavity (12) is communicated with the liquid conveying channel (11), and the first annular groove is arranged around the first concave cavity (12);
a liquid inlet one-way valve (20) which is arranged on the front pump head (10) and is connected with one end of the liquid feeding channel (11);
a liquid outlet one-way valve (30) which is arranged on the front pump head (10) and is connected with the other end of the liquid feeding channel (11);
the rear pump head (40) is provided with a hydraulic cavity (41), the front side surface of the rear pump head (40) is provided with a second concave cavity (42) and a second annular groove, the second concave cavity (42) is communicated with the hydraulic cavity (41), the second annular groove is arranged around the second concave cavity (42), the front side surface of the rear pump head (40) is in sealing connection with the rear side surface of the front pump head (10), and the first concave cavity (12) and the second concave cavity (42) are arranged in a involution mode;
a piston (50) movably disposed in the hydraulic chamber (41);
a driving mechanism for driving the piston (50) to reciprocate back and forth in the hydraulic chamber (41);
the diaphragm (60), including diaphragm body (61), first annular portion (62), second annular portion (63) and third annular portion (64), diaphragm body (61) are circular, the inner periphery edge of first annular portion (62) is connected along the periphery of diaphragm body (61), first annular portion (62) are along the radial direction of diaphragm body (61) extension, second annular portion (63) set up on one surface of first annular portion (62), third annular portion (64) set up on the other surface of first annular portion (62), second annular portion (63) and third annular portion (64) all extend along the axial direction of diaphragm body (61), diaphragm body (61) are located the cavity that first cavity (12) and second cavity (42) enclose and form, first annular portion (62) centre gripping is between preceding pump head (10) and back pump head (40), second annular portion (63) set up in the first annular groove of preceding pump head (10), third annular portion (64) set up in the second annular groove of back pump head (40).
2. Reciprocating metering pump according to claim 1, characterized in that the diaphragm body (61), the first annular part (62), the second annular part (63) and the third annular part (64) are integrally provided.
3. Reciprocating metering pump according to claim 2, characterized in that the second annular part (63) is arranged in a first annular groove of the front pump head (10) in a snap-fit manner and the third annular part (64) is arranged in a second annular groove of the rear pump head (40) in a snap-fit manner.
4. The reciprocating metering pump of claim 1, characterized in that the bottom surfaces of the first and second cavities (12, 42) are each spherical.
5. Reciprocating metering pump according to claim 1, characterized in that the bottom surface of the first cavity (12) communicates with the liquid feed channel (11) via a plurality of first through holes (121) and the bottom surface of the second cavity (42) communicates with the hydraulic chamber (41) via a plurality of second through holes (421).
6. The reciprocating metering pump according to claim 5, characterized in that the reciprocating metering pump further comprises a movable member (70), the movable member (70) comprises a movable rod (71) and a supporting plate (72), the movable rod (71) is telescopically arranged in a first through hole (121) close to the center position of the rear side face of the front pump head (10), the supporting plate (72) is vertically connected with one end of the movable rod (71), the supporting plate (72) is positioned in the first concave cavity (12), the supporting plate (72) is used for supporting the diaphragm body (61), a pressure spring (80) is sleeved on the movable rod (71), one end of the pressure spring (80) is propped against the bottom face of the first concave cavity (12), and the other end of the pressure spring (80) is propped against one surface of the supporting plate (72) which is away from the diaphragm body (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321853447.4U CN220319739U (en) | 2023-07-14 | 2023-07-14 | Reciprocating metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321853447.4U CN220319739U (en) | 2023-07-14 | 2023-07-14 | Reciprocating metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220319739U true CN220319739U (en) | 2024-01-09 |
Family
ID=89425432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321853447.4U Active CN220319739U (en) | 2023-07-14 | 2023-07-14 | Reciprocating metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220319739U (en) |
-
2023
- 2023-07-14 CN CN202321853447.4U patent/CN220319739U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |