Digital metering pump

Abstract

The utility model provides a digital metering pump, which relates to the technical field of metering pumps and comprises a pump body, the outer wall of one side of the pump body is fixedly connected with a control host, one end of the pump body is screwed with a pump cover through a nut, the top and the bottom of the pump cover are respectively provided with an outlet valve and an inlet valve, and the pump body and the pump cover are provided with the same limiting groove; and the diaphragm assembly is used for slowing down the aging process of the diaphragm, and the diaphragm assembly is connected with the pump body and the pump cover. By arranging the diaphragm assembly, the aging process of the diaphragm in the digital metering pump can be slowed down, the diaphragm can be abraded in the moving process, the self-compensation effect can be provided, in addition, even if the diaphragm is corroded and damaged by corrosive media, the sealing performance of the diaphragm cannot be affected, and enterprise property loss is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to a digital metering pump. Background Art

[0002] The digital metering pump is a programmable, mechatronic flow delivery system that can achieve high-precision, high-speed, and highly automated flow measurement and control. It is suitable for precision metering and intelligent production environments and is widely used in chemical, metallurgy, pharmaceutical, food and other industries.

[0003] In chemical production, it is often necessary to transport corrosive media such as strong acids, strong alkalis, and salt solutions. The diaphragm digital metering pump completely isolates the medium from the driving part of the pump through its diaphragm, thereby avoiding corrosion of the pump body by the medium and ensuring the service life and stable operation of the pump. However, when working in a high-pressure environment for a long time, the diaphragm needs to withstand greater stress and is constantly stretched and compressed, which can easily lead to fatigue and damage of the molecular structure of the diaphragm material and accelerate aging. For this reason, the staff needs to stop work regularly to replace the diaphragm, but this will increase production costs and affect work efficiency. If the diaphragm is not replaced in time, the precision components inside the digital metering pump may be corroded by the corrosive medium, which will lead to property losses of the enterprise. Therefore, the present application provides a digital metering pump to meet the use needs. Utility Model Content

[0004] The purpose of the present utility model is to address the deficiencies of the prior art and to provide a digital metering pump. By providing a diaphragm assembly, not only can the aging process of the diaphragm in the digital metering pump be slowed down, but also a self-compensating effect can be provided for the wear of the diaphragm during movement. In addition, even if the diaphragm is corroded and damaged by a corrosive medium, the sealing performance of the diaphragm will not be affected, thereby avoiding loss of corporate property. Moreover, the device is easy to install, so that users can replace the diaphragm with a new one in time after the diaphragm is aged and damaged, without affecting production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A digital metering pump comprises a pump body, an outer wall of one side of the pump body being fixedly connected to a control host, a pump cover being screwed to one end of the pump body via a nut, an outlet valve and an inlet valve being respectively installed on the top and bottom of the pump cover, and the pump body and the pump cover both having the same limiting groove; a diaphragm assembly, the diaphragm assembly being used to slow down the aging process of the diaphragm, the diaphragm assembly being respectively connected to the pump body and the pump cover.

[0007] Optionally, the diaphragm assembly includes a diaphragm sleeve clamped on the limiting groove.

[0008] Optionally, a first skeleton is sleeved on the inner wall of the diaphragm sleeve.

[0009] Optionally, two ends of the first skeleton are fixedly connected to a second skeleton.

[0010] Optionally, one end of the second skeleton is fixedly connected to a third skeleton.

[0011] Optionally, four W-shaped elastic plates are fixedly connected to the outer wall of one end of the third skeleton, and a lightweight groove is opened in the middle of the W-shaped elastic plate.

[0012] Optionally, one end of each of the four W-shaped elastic plates is fixedly connected to a fourth frame, and the fourth frame is provided with four arc notches.

[0013] Optionally, one end of the fourth skeleton is fixedly connected to a fifth skeleton.

[0014] Optionally, one end of the fifth skeleton is fixedly connected to a sixth skeleton, and a plurality of circular hole grooves are opened on the outer walls of both ends of the sixth skeleton.

[0015] Optionally, segmented grooves are provided on the middle outer walls of the first frame and the sixth frame.

[0016] The beneficial effects of the present invention are:

[0017] (1) The utility model can not only slow down the aging process of the diaphragm in the digital metering pump by setting a diaphragm assembly, but also provide a self-compensation effect for the wear of the diaphragm during movement. In addition, even if the diaphragm is corroded and damaged by corrosive media, it will not affect the sealing of the diaphragm, thus avoiding the loss of corporate property. Moreover, the device is easy to install, so that users can replace the diaphragm with a new one in time after the diaphragm is aged and damaged, without affecting production efficiency.

[0018] (2) The utility model provides the first frame, the second frame, the fifth frame and the sixth frame, which not only facilitates the user to quickly install the diaphragm sleeve on the pump body, but also provides the pump body with a self-compensating sealing effect, effectively preventing the corrosive medium from damaging the precision components in the pump body.

[0019] (3) The utility model can utilize the elasticity of the W-shaped elastic plate by setting it up, so as to avoid the diaphragm from being subjected to greater stress when working in a high-pressure environment for a long time, thereby slowing down the aging process of the diaphragm. The lightweight groove opened on the W-shaped elastic plate can also reduce production costs.

[0020] In summary, the utility model has the advantages of slowing down the aging process of the diaphragm sleeve and improving the sealing performance of the diaphragm sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the semi-sectioned three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the half-section structure of the utility model;

[0023] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0024] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0025] Figure 5 It is a schematic diagram of the half-cut three-dimensional structure of the diaphragm assembly;

[0026] Figure 6 This is an enlarged schematic diagram of the three-dimensional structure of the first skeleton and the second skeleton.

[0027] Figure numerals: 1. Pump body; 101. Control host; 102. Push rod; 103. Push screw; 104. Pump cover; 105. Inlet valve; 106. Outlet valve; 107. Limiting groove; 2. Diaphragm sleeve; 201. Center circular hole; 3. First skeleton; 4. Second skeleton; 5. Third skeleton; 6. W-shaped elastic plate; 601. Lightweight groove; 7. Fourth skeleton; 701. Arc notch; 8. Fifth skeleton; 9. Sixth skeleton; 901. Circular hole groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0030] Example 1

[0031] like Figures 1 to 6 As shown, this embodiment provides a digital metering pump, including a pump body 1, a control host 101 is fixedly connected to the outer wall of one side of the pump body 1, a pump cover 104 is screwed to one end of the pump body 1 through a nut, an outlet valve 106 and an inlet valve 105 are respectively installed on the top and bottom of the pump cover 104, and the pump body 1 and the pump cover 104 are both provided with the same limiting groove 107; a diaphragm assembly, the diaphragm assembly is used to slow down the aging process of the diaphragm, and the diaphragm assembly is respectively connected to the pump body 1 and the pump cover 104. Specifically, the control host 101 is fixedly connected to the outer wall of one side of the pump body 1, and the control host 101 is mainly responsible for accurately controlling the operation of the pump to ensure accurate dosing of liquid chemicals. The pump cover 104 is screwed to the outer wall of one end of the pump body 1 through a nut, and the inlet valve 105 and the outlet valve 106 are respectively installed at the bottom and top of the pump cover 104, and the same limiting groove 107 is opened on the outer walls at both ends where the pump body 1 and the pump cover 104 are connected.

[0032] As an implementation method in this embodiment, Figures 1 to 6As shown, the sealing assembly includes a diaphragm sleeve 2 clamped on the limiting groove 107, a first skeleton 3 is sleeved on the inner wall of the diaphragm sleeve 2, and the two ends of the first skeleton 3 are fixedly connected to the second skeleton 4. Specifically, the diaphragm sleeve 2 is clamped on the plum blossom-shaped limiting groove 107. The diaphragm sleeve 2 is made of fluororubber and has excellent high temperature resistance and chemical corrosion resistance. The first skeleton 3 sleeved on the inner wall of the diaphragm sleeve 2 is in a "C" shape and is made of PVC plastic. A segmented groove is opened on the middle outer wall of the first skeleton 3, which can undergo segmented deformation to facilitate the diaphragm sleeve 2 to be clamped into the limiting groove 107. There are two second skeletons 4, which are fixedly connected to the two ends of the first skeleton 3 in a mirror image. The second skeleton 4 is in an "S" shape and is made of PVC plastic. The end of the second skeleton 4 close to the first skeleton 3 is provided with an outward protrusion, and the end away from the first skeleton 3 is provided with an inward protrusion. The outer wall contours of the first skeleton 3 and the second skeleton 4 are adapted to the inner wall of the limiting groove 107, and can be fully fitted with the diaphragm sleeve 2 in cooperation with the diaphragm sleeve 2. It fits perfectly on the inner wall of the limiting groove 107 without leaving any gap. When the user is installing the diaphragm, the segmented groove opened on the outer wall of the first frame 3 allows the staff to quickly place the diaphragm sleeve 2 into the limiting groove 107 of the pump body 1. Due to the limitation of the limiting groove 107, there is no need to adjust the position manually. Then align the pump cover 104 with the position of the screw hole on the pump body 1 and tighten the screw. At this time, as the screw is tightened, the outer wall of the end of the pump cover 104 with the limiting groove 107 is opened. It will squeeze the diaphragm sleeve 2, causing the two ends of the first skeleton 3 on which it is mounted to deform inward, and the outward protrusions on the two second skeletons 4 will also deform along the bending direction under the action of pressure. Subsequently, the first skeleton 3 and the second skeleton 4 will restore their original shapes under the action of elasticity, and will press against the inner wall of the diaphragm sleeve 2, so that the outer wall of the diaphragm sleeve 2 firmly presses against the inner wall of the limiting groove 107. The above structural setting can help the staff quickly install the diaphragm sleeve 2 on the pump body 1 and provide a good sealing effect.

[0033] One end of the second skeleton 4 is fixedly connected to the third skeleton 5, and four W-shaped elastic plates 6 are fixedly connected to the outer wall of one end of the third skeleton 5. A lightweight groove 601 is provided in the middle of the W-shaped elastic plate 6, and one end of the four W-shaped elastic plates 6 is fixedly connected to the fourth skeleton 7. Four arc notches 701 are provided on the fourth skeleton 7. Specifically, the third skeleton 5 is in the shape of a hollow circular plate and is made of PVC plastic. One end of the third skeleton 5 is fixedly connected to the other end of the second skeleton 4, and cooperates with the inward protrusion set on the second skeleton 4 to have an avoidance effect, which can prevent the diaphragm sleeve 2 from rubbing against the inner walls of the pump body 1 and the pump cover 104 when the diaphragm sleeve 2 is performing reciprocating motion, causing the diaphragm sleeve 2 to be worn. The W-shaped elastic plate 6 is in the shape of a "W" and is made of PVC plastic. One end of the four W-shaped elastic plates 6 is fixedly connected to the other end of the third skeleton 5, and the other end of the four W-shaped elastic plates 6 is fixedly connected to one end of the fourth skeleton 7. It is in the shape of a hollow circular plate and is made of PVC plastic. A lightweight groove 601 and four arc notches 701 are respectively provided in the middle of the W-shaped elastic plate 6 and the fourth skeleton 7. Such a setting can reduce the production cost of the device. When the staff starts the digital metering pump, the diaphragm sleeve 2 realizes reciprocating motion under the action of the driving mechanism. When the push rod pushes the diaphragm sleeve 2 toward the pump cover 104, the end of the W-shaped elastic plate 6 close to the fourth skeleton 7 will be displaced toward the pump cover 104. On the contrary, when the push rod contracts, it will drive the end of the W-shaped elastic plate 6 close to the fourth skeleton 7 to be displaced toward that direction of the pump body 1. During the reciprocating motion of the push rod, the W-shaped elastic plate 6 will continue to deform in the bending direction. At this time, the diaphragm sleeve 2 changes with the W-shaped elastic plate 6. The above structural setting can utilize the effect of elasticity to reduce the tensile elastic strength of the diaphragm sleeve 2 and slow down the aging process of the diaphragm sleeve 2.

[0034] One end of the fourth frame 7 is fixedly connected to the fifth frame 8, and one end of the fifth frame 8 is fixedly connected to the sixth frame 9. A number of circular hole grooves 901 are provided on the outer walls of both ends of the sixth frame 9, and a segmented groove is provided on the middle outer wall of the sixth frame 9. Specifically, one end of the fifth frame 8 is fixedly connected to the other end of the fourth frame 7. The fifth frame 8 is in an "S" shape and is made of PVC plastic. The end of the fifth frame 8 close to the sixth frame 9 is provided with an outward protrusion, and the end away from the fourth frame 7 is provided with an inward protrusion. The fourth frame 7 cooperates with the fifth frame The inward protrusions set on 8 have an avoidance effect, which can prevent the diaphragm sleeve 2 from rubbing against the outer walls of the fourth skeleton 7 and the push screw 103 and the push rod 102 when the diaphragm sleeve 2 is performing reciprocating motion. The other ends of the two fifth skeletons 8 are respectively fixedly connected to the two ends of the sixth skeleton 9 in a mirror-image manner. The sixth skeleton 9 is made of PVC plastic and is in a "C" shape. Several circular hole grooves 901 are opened on the outer walls at both ends of the sixth skeleton 9, which can reduce the production cost of the device. The segmented groove is opened in the middle of the sixth skeleton 9, which can facilitate the installation of the push screw 103 on the push rod 102. When the staff is installing the diaphragm sleeve 2, they will insert the push screw 103 into the central circular hole 201 of the diaphragm sleeve 2 to fix the diaphragm sleeve 2 on the outer wall of one end of the push rod 102. In the process of tightening the push screw 103, the diaphragm sleeve 2 will be squeezed, causing the two ends of the sixth frame 9 on which it is mounted to deform inwardly, and the outward protrusions on the two fifth frames 8 will also deform in the bending direction under the action of pressure. Subsequently, the sixth frame 9 and the fifth frame 8 will restore their original shape under the action of elasticity and will press against the inner wall of the diaphragm sleeve 2, thereby making the diaphragm sleeve 2 The outer wall of the diaphragm sleeve 2 is against the outer wall of one side of the push screw 103 and the outer wall of one end of the push rod 102, which effectively prevents the circulating medium from invading the interior of the digital metering pump, causing corrosion and damage to the precision components. Even if the diaphragm sleeve 2 is damaged by friction with the outer walls of the push screw 103 and the push rod 102 during the stretching and contraction process, the sixth frame 9 and the fifth frame 8 provide a self-compensation effect under the elastic action of the sixth frame 9 and the fifth frame 8. The above structural setting not only makes it convenient for the staff to install the diaphragm sleeve 2 on the push rod 102, but also provides a self-compensating sealing effect.

[0035] Working steps

[0036] Step 1. Before use, the staff needs to place the diaphragm sleeve 2 into the limiting groove 107 of the pump body 1. Due to the limiting effect of the limiting groove 107, the position of the diaphragm sleeve 2 is fixed and no manual adjustment is required. Next, insert the push screw 103 into the circular hole in the center of the diaphragm sleeve 2 and fix it on the outer wall of one end of the push rod 102. In the process of tightening the push screw 103, the diaphragm sleeve 2 will be squeezed, causing the two ends of the sixth skeleton 9 on it to deform inward. At the same time, the outward protrusion on the fifth skeleton 8 will also deform in the bending direction under the action of pressure. Subsequently, the sixth skeleton 9 and the fifth skeleton 8 return to their original shape under the action of elasticity, and press against the inner wall of the diaphragm sleeve 2, so that the outer wall of the diaphragm sleeve 2 is close to the outer wall of one side of the push screw 103 and the outer wall of one end of the push rod 102. Next, align the pump cover 104 with the screw port on the pump body 1 and tighten the screw. As the screws are tightened, the outer wall of one end of the retaining groove 107 on the pump cover 104 compresses the diaphragm sleeve 2, causing the ends of the second frame 4 on it to deform inward. The outward protrusions on the second frame 4 also deform in a bending direction under the pressure. Then, the first and second frames 3 and 4 elastically return to their original shape, pressing against the inner wall of the diaphragm sleeve 2, firmly securing the outer wall of the diaphragm sleeve 2 against the inner wall of the retaining groove 107. This completes the installation process, which is simple and quick. Even if the diaphragm sleeve 2 is damaged during use, it can be replaced promptly without affecting work progress.

[0037] Step 2. When the staff starts the digital metering pump, the diaphragm sleeve 2 performs reciprocating motion under the action of the driving mechanism. When the push rod pushes the diaphragm sleeve 2 to move toward the pump cover 104, the end of the W-shaped elastic plate 6 close to the fourth skeleton 7 will be displaced toward the pump cover 104. On the contrary, when the push rod retracts, it will drive the end of the W-shaped elastic plate 6 close to the fourth skeleton 7 to displace toward the pump body 1. During the reciprocating motion of the push rod, the W-shaped elastic plate 6 will continue to deform along the bending direction, and the diaphragm sleeve 2 will change accordingly. Since the second skeleton 4 and the fifth skeleton 8 are both provided with inward protrusions, they cooperate with the third skeleton 5 and the fourth skeleton 7 respectively to form an avoidance structure, which enables the W-shaped elastic plate 6 to be deformed smoothly when the diaphragm sleeve 2 performs reciprocating motion.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A digital metering pump, comprising a pump body, characterized in that: A control host is fixedly connected to the outer wall of one side of the pump body, a pump cover is screwed to one end of the pump body through a nut, an outlet valve and an inlet valve are installed on the top and bottom of the pump cover respectively, and the pump body and the pump cover are both provided with a same limiting groove; A diaphragm assembly is used to slow down the aging process of the diaphragm, and the diaphragm assembly is connected to the pump body and the pump cover respectively.

2. A digital metering pump according to claim 1, characterized in that: The diaphragm assembly includes a diaphragm sleeve clamped on the limiting groove.

3. A digital metering pump according to claim 2, characterized in that: A first frame is sleeved on the inner wall of the diaphragm sleeve.

4. A digital metering pump according to claim 3, characterized in that: The two ends of the first frame are fixedly connected to the second frame.

5. A digital metering pump according to claim 4, characterized in that: One end of the second frame is fixedly connected to the third frame.

6. A digital metering pump according to claim 5, characterized in that: Four W-shaped elastic plates are fixedly connected to the outer wall of one end of the third frame, and a lightweight groove is opened in the middle of the W-shaped elastic plate.

7. A digital metering pump according to claim 6, characterized in that: One end of each of the four W-shaped elastic plates is fixedly connected to a fourth frame, and the fourth frame is provided with four arc notches.

8. A digital metering pump according to claim 7, characterized in that: One end of the fourth frame is fixedly connected to the fifth frame.

9. A digital metering pump according to claim 8, characterized in that: One end of the fifth frame is fixedly connected to the sixth frame, and a plurality of circular hole grooves are opened on the outer walls of both ends of the sixth frame.

10. A digital metering pump according to claim 9, characterized in that: The middle outer walls of the first frame and the sixth frame are both provided with segmented grooves.

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