Peristaltic pump pulse eliminator with filtering function

Abstract

The utility model discloses a peristaltic pump pulse eliminator with a filtering function, which comprises a lower shell, one end of the lower shell is provided with a liquid outlet, and the liquid outlet is connected with a spray gun. The upper portion of the lower shell is connected with the upper shell through a clamping hoop to form a closed cavity, and a filtering sealing ring is arranged at the joint of the interior of the upper shell and the interior of the lower shell. The upper shell is provided with a liquid inlet which is connected with a pump pipe of the peristaltic pump. The pulse elimination filter for the peristaltic pump is simple in structure and convenient to operate, overcomes the defects in the prior art, solves the problems of liquid supply pulse and particle impurity filtration of the peristaltic pump, and is stable, consistent and clean. The liquid supply stability and cleanliness of the peristaltic pump are improved, and the problems that the spraying amount fluctuates up and down and the gun is blocked in the coating process can be effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of peristaltic pumps, and particularly relates to a peristaltic pump pulse eliminator with a filtering function. Background Art

[0002] Existing peristaltic pumps generally include a peristaltic pump main body, a pump head and a pump tube. The pump tube is installed in the peristaltic pump head, and movable clamps are provided on both sides of the pump head to prevent the pump tube from moving. During the daily operation of the peristaltic pump, the roller presses tightly on the pump tube filled with fluid. As the roller moves forward, the fluid in the tube moves forward. By alternately squeezing and releasing the elastic delivery hose of the pump, the pumping of the fluid is realized. A negative pressure is formed in the pump tube where the roller rolls over, and the liquid flows accordingly. However, every time the roller squeezes the pump tube, liquid backflow will occur instantaneously, causing a peristaltic pump delivery pulse. When the peristaltic pump tube is connected to a small-diameter outlet, the pulse effect is even more pronounced. Especially in the process of solid preparation coating, the liquid is transported by a peristaltic pump. Due to the pulse effect, the spraying liquid volume fluctuates up and down during the coating process, affecting the uniformity and consistency of the coating, increasing the coating time, and reducing the utilization rate of the coating liquid.

[0003] Moreover, the liquid used for coating needs to be completely dissolved, and the liquid cannot contain undissolved particles. However, the peristaltic pump uses segmented alternating extrusion and can allow small particles to move and be pumped along with the liquid. Therefore, when in use, the risk of the coating liquid clogging the small-diameter outlet of the spray gun is increased. Summary of the Utility Model

[0004] The problem to be solved by the utility model is to provide a peristaltic pump pulse eliminator, especially a peristaltic pump pulse eliminator with a filtering function that has a simple structure, is easy to operate, reduces the risk of the coating liquid clogging the spray gun outlet, eliminates pulses, and improves the liquid supply stability and cleanliness of the peristaltic pump.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a peristaltic pump pulse eliminator with a filtering function, including a lower housing. One end of the lower housing is provided with a liquid outlet, and the liquid outlet is connected to a spray gun. The upper part of the lower housing is connected to an upper housing through a clamping clamp to form a sealed chamber. A filtering sealing ring is provided at the connection between the inside of the upper housing and the inside of the lower housing. The upper housing is provided with a liquid inlet, and the liquid inlet is connected to the peristaltic pump tube.

[0006] Further, the lower housing is a cylinder, and a cylindrical lower cavity is provided inside the lower housing. The lower cavity is coaxial with the lower housing. The liquid outlet is located at the lower part of the side surface of the lower housing. A lower housing flange is provided at the top of the lower housing. A lower sealing groove is provided on the upper part of the lower housing flange, and a clamping inclined surface is provided at the lower part of the lower housing flange.

[0007] Further, the liquid outlet is a circular tubular structure, and a tower-shaped groove is provided on the outer cylindrical surface of the liquid outlet.

[0008] Further, the clamping clamp includes an active chuck and a passive chuck. Both the active chuck and the passive chuck are semi-circular rings. One end of the active chuck is connected to one end of the passive chuck through a connecting device, and the other end of the active chuck is connected to the other end of the passive chuck through an opening and closing device, so that the clamping clamp forms a circular ring.

[0009] Further, the connecting device includes a connecting plate. The connecting plate is a strip-shaped plate, and rivet holes are respectively provided at both ends of the connecting plate. First strip-shaped grooves are provided at one end of the active chuck and one end of the passive chuck, and the connecting plate is placed in the first strip-shaped grooves and fixed by rivets.

[0010] Further, the opening and closing device includes a movable bolt and a locking nut. Second strip-shaped grooves are provided at the other end of the active chuck and the other end of the passive chuck, the movable bolt is placed in the second strip-shaped grooves, one end of the movable bolt is fixed to the end of the active chuck by a rivet, and the other end of the movable bolt is sleeved with the locking nut.

[0011] Further, the main body of the upper shell is a cylinder, the top of the upper shell is hemispherical, an upper cavity is provided inside the upper shell, the upper cavity is coaxial with the upper shell, the liquid inlet is arranged at the top of the side of the main body of the upper shell, a flange of the upper shell is provided at the bottom of the upper shell, a sealing groove is provided at the bottom of the flange of the upper shell, and a clamping inclined surface is provided on the upper part of the flange of the upper shell.

[0012] Further, the structure of the liquid inlet is the same as that of the liquid outlet.

[0013] Further, the filter sealing ring includes a filter screen, and the filter screen is installed between the flange of the upper shell and the flange of the lower shell.

[0014] Further, the filter sealing ring further includes a sealing flange gasket, and positioning protrusions are provided on the sealing flange gasket.

[0015] The advantages and positive effects of the present utility model are as follows:

[0016] The structure of the present utility model is simple and easy to operate, overcoming the deficiencies of the prior art, solving the problems of liquid supply pulse of the peristaltic pump and filtration of particulate impurities, and providing a stable, consistent and clean peristaltic pump pulse elimination filter. The liquid supply stability and cleanliness of the peristaltic pump are improved, and problems such as the up and down fluctuation of the spraying amount and gun jamming during coating can be effectively solved. Description of the Drawings

[0017] Figure 1It is a schematic diagram of the overall connection state of an embodiment of the present utility model.

[0018] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the present utility model.

[0019] Figure 3 It is a cross-sectional view of the lower housing structure of an embodiment of the present utility model.

[0020] Figure 4 It is a cross-sectional view of the clamping collar structure of an embodiment of the present utility model.

[0021] Figure 5 It is a cross-sectional view of the upper housing structure of an embodiment of the present utility model.

[0022] Figure 6 It is a cross-sectional view of the filter sealing ring structure of an embodiment of the present utility model.

[0023] Figure 7 It is a schematic diagram of the overall usage state of an embodiment of the present utility model.

[0024] In the figure:

[0025] 1. Lower housing; 1-1. Liquid outlet; 1-2. Lower sealing groove; 1-3. Lower cavity; 1-4. Lower housing flange;

[0026] 2. Clamping collar; 2-1. Active chuck; 2-2. Passive chuck; 2-3. First strip groove; 2-4. Second strip groove; 2-5. Movable bolt; 2-6. Locking nut; 2-7. Connecting plate;

[0027] 3. Upper housing; 3-1. Upper housing flange; 3-2. Liquid inlet; 3-3. Upper cavity; 3-4. Upper sealing groove;

[0028] 4. Filter sealing ring; 4-1. Filter screen; 4-2. Sealing flange gasket; 4-3. Positioning protrusion;

[0029] 5. Spray gun;

[0030] 6. Peristaltic pump pulse eliminator with filtering function;

[0031] 7. Peristaltic pump;

[0032] 8. Air;

[0033] 9. Coating liquid. Detailed implementation manners

[0034] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The following further describes the embodiments of the present utility model in conjunction with the accompanying drawings:

[0038] As Figure 1 、 Figure 2 shown, a peristaltic pump pulse eliminator with a filtering function includes a lower housing 1. One end of the lower housing 1 is provided with a liquid outlet 1-1, and the liquid outlet 1-1 is connected to a spray gun 5. The upper part of the lower housing 1 is connected to an upper housing 3 through a clamping clamp 2 to form a sealed chamber, and a filtering sealing ring 4 is provided at the connection between the inside of the upper housing 3 and the inside of the lower housing 1. The upper housing 3 is provided with a liquid inlet 3-2, and the liquid inlet 3-2 is connected to the pump tube of a peristaltic pump 7.

[0039] Specifically, as Figure 3As shown in the figure, the lower housing 1 is a cylinder with an open top and a sealed bottom. Inside the lower housing 1, there is a cylindrical lower cavity 1-3, and the lower cavity 1-3 is coaxial with the lower housing 1. The liquid outlet 1-1 is located at the lower part of the side of the lower housing 1. A lower housing flange 1-4 is provided at the top of the lower housing 1, and a lower sealing groove 1-2 is provided above the lower housing flange 1-4. The lower sealing groove 1-2 cooperates with the positioning protrusion 4-3 on the sealing flange gasket 4-2 to achieve sealing. The lower part of the lower housing flange 1-4 is equipped with a clamping inclined surface, which is convenient for cooperating with the inner inclined surface of the chuck of the clamping clamp 2 to clamp the upper housing 3 and the lower housing 1. Preferably, the liquid outlet 1-1 is a circular tubular structure, and a tower-shaped groove is provided on the outer cylindrical surface of the liquid outlet 1-1, which increases the connection firmness of the hose between the liquid outlet 1-1 and the spray gun.

[0040] As Figure 4 shown, the clamping clamp 2 includes an active chuck 2-1 and a passive chuck 2-2. Both the active chuck 2-1 and the passive chuck 2-2 are semi-circular rings. One end of the active chuck 2-1 is connected to one end of the passive chuck 2-2 through a connecting device, and the other end of the active chuck 2-1 is connected to the other end of the passive chuck 2-2 through an opening and closing device, so that the clamping clamp 2 is in a circular ring shape.

[0041] The connecting device is a device for connecting one end of the active chuck 2-1 and one end of the passive chuck 2-2. The connecting device can have various structures as long as the above functions are achieved. Specifically, as Figure 1 、 Figure 4 shown, the connecting device provided in this embodiment includes a connecting plate 2-7. The connecting plate 2-7 is a strip-shaped plate. Rivet holes are respectively provided at both ends of the connecting plate 2-7. First strip-shaped grooves 2-3 are provided at one end of the active chuck 2-1 and one end of the passive chuck 2-2. The connecting plate 2-7 is placed in the first strip-shaped grooves 2-3 and fixed by rivets.

[0042] The opening and closing device is a device for realizing the opening and closing of the other end of the active chuck 2-1 and the other end of the passive chuck 2-2. The opening and closing device can have various structures as long as the above functions are achieved. Specifically, as Figure 1 、 Figure 4 shown, the opening and closing device provided in this embodiment includes a movable bolt 2-5 and a locking nut 2-6. Second strip-shaped grooves 2-4 are provided at the other end of the active chuck 2-1 and the other end of the passive chuck 2-2. The movable bolt 2-5 is placed in the second strip-shaped grooves 2-4. One end of the movable bolt 2-5 is fixed to the end of the active chuck 2-1 by a rivet. The other end of the movable bolt 2-5 is sleeved with the locking nut 2-6. The locking nut 2-6 rotates along the movable bolt 2-5. When the end face of the locking nut 2-6 contacts the side face of the fourth connecting ear 2-6, the clamping clamp 2 is locked.

[0043] As Figure 5As shown in the figure, the main body of the upper housing 3 is a cylinder, the top of the upper housing 3 is hemispherical, an upper cavity 3-3 is provided inside the upper housing 3, the upper cavity 3-3 is coaxial with the upper housing 3, and the bottom of the upper housing 3 is open. The liquid inlet 3-2 is placed at the top of the side of the main body of the upper housing 3. A flange 3-1 of the upper housing is provided at the bottom of the upper housing 3, and a sealing groove 3-4 is provided at the bottom of the flange 3-1 of the upper housing. The sealing groove 3-4 cooperates with the positioning protrusion 4-3 on the sealing flange gasket 4-2 to achieve positioning and sealing. A clamping inclined surface is provided on the upper part of the flange 3-1 of the upper housing, and a clamping inclined surface is also provided on the lower part of the flange 1-4 of the lower housing, which is convenient for the inner inclined surface of the chuck of the clamping clamp to clamp the upper housing 3 and the lower housing 1. The liquid inlet 3-2 is a circular tubular structure, and a tower-shaped groove is provided on the outer cylindrical surface of the liquid inlet 3-2, which increases the connection firmness between the liquid inlet 3-2 and the pump tube of the peristaltic pump 7.

[0044] As Figure 6 shown, the filter sealing ring 4 includes a filter screen 4-1. The filter screen 4-1 is a cylindrical cavity. The filter screen 4-1 is installed on the sealing ring, and the sealing ring is installed between the flange 3-1 of the upper housing and the flange 1-4 of the lower housing. Preferably, the filter sealing ring 4 further includes a sealing flange gasket 4-2. A positioning protrusion 4-3 is provided on the sealing flange gasket 4-2. The positioning protrusion 4-3 cooperates with the upper sealing groove 3-4 and the lower sealing groove 1-2 to achieve cavity positioning and sealing.

[0045] The working principle of the present utility model is as follows:

[0046] Before use, install the filter sealing ring 4 on the lower housing 1, and align the positioning protrusion 4-3 on the sealing flange gasket 4-2 with the groove on the flange 1-4 of the lower housing. Install the upper housing 3 on the filter sealing ring 4, and align the groove on the flange 3-1 of the upper housing with the positioning protrusion 4-3 on the sealing flange gasket 4-2. Install the clamping clamp 2 at the combined connection of the lower housing 1, the filter sealing ring 4, and the upper housing 3. Place the movable bolt 2-5 into the second strip-shaped groove 2-4 of the passive chuck 2-2, and lock the lock nut 2-6 to complete the combination.

[0047] During use, the external connection is as Figure 1 shown. The interface of the liquid inlet 3-2 of the upper housing 3 of the peristaltic pump pulse eliminator 6 with a filtering function is connected to the side liquid inlet pipe of the peristaltic pump 7, and the liquid outlet 1-1 of the lower housing 1 is connected to the liquid outlet pipe in the direction of the spray gun 5.

[0048] The use state is as Figure 7As shown in the figure: The coating liquid 9 flows into the upper housing 3 through the liquid inlet 3-2 and passes through the filter screen 4-1. The impurities in the coating liquid 9 are filtered and intercepted inside the filter screen 4-1, and finally the impurity-free coating liquid 9 flows out from the liquid outlet 1-1 of the lower housing 1; during normal use, since the cross-sectional area of the outlet of the final spray gun 5 is much smaller than that of the liquid outlet 1-1 of the connected lower housing 1, a certain pressure will be formed inside the peristaltic pump pulse eliminator 6 with a filtering function. According to the ideal gas state equation pV=nRT, where p is the pressure (Pa), V is the gas volume (m 3 ), T is the temperature (K), n is the amount of substance of the gas (mol), and R is the molar gas constant. When n, R, and T (since the coating liquid 9 flows to balance heat and the temperature remains unchanged, T is regarded as a constant) are all constant values, p and V are inversely proportional. When the level of the coating liquid 9 rises, the volume of the upper air 8 decreases and the pressure increases; when the level drops, the volume of the upper air 8 increases and the pressure decreases, so as to balance the pressure inside the peristaltic pump pulse eliminator 6 with a filtering function and tend to be stable. When the pressure inside the peristaltic pump pulse eliminator 6 with a filtering function is stable, the flow rate of the coating liquid 9 at the liquid outlet 1-1 of the lower housing 1 is stable and the pulse tends to disappear.

[0049] The advantages and positive effects of the present utility model are:

[0050] The structure of the present utility model is simple and the operation is convenient. It overcomes the deficiencies of the prior art, solves the problems of peristaltic pump liquid supply pulse and particle impurity filtration, and provides a stable, consistent and clean peristaltic pump pulse elimination filter. It improves the liquid supply stability and cleanliness of the peristaltic pump, and can effectively solve problems such as the up and down fluctuation of the spraying amount and gun clogging during coating.

[0051] The above has described the embodiments of the present utility model in detail, but the content described is only the preferred embodiments of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A peristaltic pump pulsation eliminator with a filtering function, characterized in that: It includes a lower housing. One end of the lower housing is provided with a liquid outlet, and the liquid outlet is connected to a spray gun. The upper part of the lower housing is connected to an upper housing through a clamping clamp to form a sealed chamber. A filter sealing ring is provided at the connection between the inside of the upper housing and the inside of the lower housing. The upper housing is provided with a liquid inlet, and the liquid inlet is connected to a peristaltic pump pipe.

2. The peristaltic pump pulse eliminator with a filtering function according to claim 1, characterized in that: The lower housing is a cylinder. A cylindrical lower cavity is provided inside the lower housing, and the lower cavity is coaxial with the lower housing. The liquid outlet is located at the lower part of the side of the lower housing. A lower housing flange is provided at the top of the lower housing. A lower sealing groove is provided above the lower housing flange, and a clamping inclined surface is provided below the lower housing flange.

3. A peristaltic pump pulsation eliminator with a filtering function according to claim 1 or 2, characterized in that: The liquid outlet is a circular tubular structure, and a tower-shaped groove is provided on the outer cylindrical surface of the liquid outlet.

4. A peristaltic pump pulse eliminator with a filtering function according to claim 1 or 2, characterized in that: The clamping clamp includes an active chuck and a passive chuck. Both the active chuck and the passive chuck are semi-circular rings. One end of the active chuck is connected to one end of the passive chuck through a connecting device, and the other end of the active chuck is connected to the other end of the passive chuck through an opening and closing device, so that the clamping clamp is in a circular ring shape.

5. A peristaltic pump pulse eliminator with a filtering function according to claim 4, characterized in that: The connecting device includes a connecting plate. The connecting plate is a strip-shaped plate. Rivet holes are respectively provided at both ends of the connecting plate. A first strip-shaped groove is provided at one end of the active chuck and one end of the passive chuck. The connecting plate is placed in the first strip-shaped groove and fixed by rivets.

6. A peristaltic pump pulse eliminator with a filtering function according to claim 4, characterized in that: The opening and closing device includes a movable bolt and a locking nut. A second strip-shaped groove is provided at the other end of the active chuck and the other end of the passive chuck. The movable bolt is placed in the second strip-shaped groove. One end of the movable bolt is fixed to the end of the active chuck by a rivet, and the other end of the movable bolt is sleeved with the locking nut.

7. A peristaltic pump pulsation eliminator with a filtering function according to claim 1 or 2, characterized in that: The main body of the upper housing is a cylinder, and the top of the upper housing is hemispherical. An upper cavity is provided inside the upper housing, and the upper cavity is coaxial with the upper housing. The liquid inlet is located at the top of the side of the main body of the upper housing. An upper housing flange is provided at the bottom of the upper housing. An upper sealing groove is provided at the bottom of the upper housing flange, and a clamping inclined surface is provided above the upper housing flange.

8. A peristaltic pump pulsation eliminator with a filtering function according to claim 3, characterized in that: The structure of the liquid inlet is the same as that of the liquid outlet.

9. A peristaltic pump pulse eliminator with a filtering function according to claim 1 or 2, characterized in that: The filter sealing ring includes a filter screen, and the filter screen is installed between the upper housing flange and the lower housing flange.

10. A peristaltic pump pulsation eliminator with a filtering function according to claim 9, characterized in that: The filter sealing ring further includes a sealing flange gasket, and positioning protrusions are provided on the sealing flange gasket.

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