Fluid metering pump

Abstract

The present invention relates to a fluid constant-volume transport pump that includes a tube guide block into which a fluid transport tube is inserted so that a portion of the tube is exposed, a tube compression block that compresses the exposed portion of the tube inserted into the tube guide block to transport the fluid, an air cylinder that reciprocates the tube compression block by moving a rod back and forth in a linear direction using compressed air, and an elastic member that applies an elastic force to the air cylinder so that the tube compression block compresses the tube, and that is capable of accurately compressing the tube and discharging a constant volume of fluid.

Description

[Technical field]

[0001] The present invention relates to a constant-volume fluid transport pump that transports a fluid by crimping a tube using air as a power source. [Background technology]

[0002] In general, a fluid transport pump is a device that uses pressure to transport fluids such as liquids and gases, and is widely used as a means of transporting fluids in a variety of applications, including environmental pollution prevention facilities such as sewage treatment facilities, oil well facilities for crude oil and natural gas, fluid transport equipment for the chemical industry, and pumping facilities.

[0003] Here, fluid transport pumps used to transport small amounts of chemicals such as reagents and neutralizing agents are configured to discharge a fixed amount of fluid using electric motors, solenoid valves, etc. However, conventional fluid transport pumps that are electrically operated are inherently limited in their use in explosion-proof devices.

[0004] For the above reasons, a fluid transport pump has been developed recently that transports fluid by crimping a tube using the reciprocating motion of an air cylinder. However, such conventional fluid transport pumps using air have a problem that the tube may not be crimped accurately due to the shape of the tube, machining / assembly errors of parts for tube crimping, and deviation of the rod that appears when the air cylinder reciprocates, which changes the amount of fluid transported (discharge amount), thereby reducing the function as a metering pump. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Republic of Korea Patent No. 10-0832042 (published on May 27, 2008) [Patent Document 2] Republic of Korea Patent No. 10-2259410 (published on 2021.06.01.) Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to solve the above-mentioned problems, and has as its object to provide a fluid constant-volume transport pump that can be safely used in explosion-proof areas by being driven by compressed air.

[0007] Another object of the present invention is to provide a constant-volume fluid transport pump that is capable of accurately crimping a tube and discharging a constant volume of fluid. [Means for solving the problem]

[0008] The present invention includes a tube guide block into which a fluid transport tube is inserted so that a portion of the tube is exposed; a tube compression block that is arranged to be able to move back and forth on the tube guide block and compresses the exposed portion of the tube inserted into the tube guide block so that the fluid is transported; an air cylinder that has a rod connected to the tube compression block and uses compressed air to reciprocate the rod in a linear direction to reciprocate the tube compression block; and an elastic member that applies an elastic force to the air cylinder so that the tube compression block compresses the tube.

[0009] Preferably, the tube guide block includes a guide rail that guides the reciprocating movement of the tube compression block, and a tube insertion path formed at the lower part of the guide rail, having an "∩"-shaped cross section when viewed from the side, and having a straight path with an upper side exposed to the outside on the guide rail, and the tube inserted into the tube insertion path is exposed to the outside on the guide rail and is crimped by the tube compression block.

[0010] Here, the tube compression block includes a pair of side plates arranged next to each other at a distance from each other, a connecting rod arranged between the pair of side plates, connecting the pair of side plates and being coupled to the rod, and a roller member rotatably installed between the pair of side plates and compressing the tube while sliding or rolling along the guide rail.

[0011] Preferably, the roller members include a first roller member provided on the rear side of the side plate and a second roller member provided on the front side of the side plate, the distance between the first roller member and the second roller member corresponds to the length of the tube exposed to the outside on the guide rail, and the first roller member transports fluid in the tube when the tube compression block moves forward, and the second roller member blocks the transport of fluid in the tube when the tube compression block moves backward.

[0012] Meanwhile, the guide rail may be composed of a plurality of guide rails spaced apart from each other along a direction perpendicular to the moving direction of the tube compression block, each guide rail may have a tube insertion path formed therein, and the roller member may have rollers the number of which corresponds to the number of the guide rails, thereby enabling fluid transport of a plurality of tubes.

[0013] Preferably, the elastic member is a compression spring, a tension spring, a torsion spring or a leaf spring, and is installed between the tube guide block or a frame formed integrally with the tube guide block and the air cylinder, and is characterized in that the elastic member presses the tube compression block connected to the rod of the air cylinder downward by pressurizing the air cylinder upward.

[0014] More preferably, the air cylinder is configured to be vertically rotatable about the elastic member as an axis.

[0015] The tube compression block is connected to the rod of the air cylinder so as to be rotatable about the connecting rod as an axis.

[0016] Preferably, the tube compression block is connected to the rod of the air cylinder so as to be tiltable left and right along the width direction of the tube guide block. Effect of the Invention

[0017] The fluid quantitative transport pump according to the present invention is not electrically operated but operates by crimping a tube using compressed air, and therefore can be safely used in explosion-proof products and explosion-proof areas.

[0018] Furthermore, according to the present invention, the elastic force of the elastic member enables the tube compression block to compress the tube with a constant force, making it possible to discharge a fixed amount of fluid.

[0019] In addition, according to the present invention, the air cylinder can rotate up and down and the tube compression block can rotate, so that the tube can be stably and accurately compressed even when the diameter or shape of the fluid transport tube changes, making it possible to discharge a fixed amount of fluid. [Brief description of the drawings]

[0020] [Figure 1] 1 is a perspective view of a fluid metering pump according to the present invention; [Diagram 2] 1 is a side view of a fluid constant-rate transport pump according to the present invention, in which a tube guide block is cut away to allow the inside of the tube guide block to be seen; [Diagram 3] 1 is a side view of a fluid metering pump according to the present invention, cut away to reveal the inside of a tube compression module; FIG. [Figure 4a] 4a and 4b are perspective views showing the forward and reverse movement of a tube compression module of a fluid metering pump according to the present invention. [Figure 4b]4a and 4b are perspective views showing the forward and reverse movement of a tube compression module of a fluid metering pump according to the present invention. [Figure 5a] 5a, 5b and 5c are diagrams showing the rotational states of the air cylinder, rod and tube compression module of the fluid quantitative transport pump according to the present invention. [Figure 5b] 5a, 5b and 5c are diagrams showing the rotational states of the air cylinder, rod and tube compression module of the fluid quantitative transport pump according to the present invention. [Figure 5c] 5a, 5b and 5c are diagrams showing the rotational states of the air cylinder, rod and tube compression module of the fluid quantitative transport pump according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] 1 to 3, the fluid quantitative transport pump according to the present invention includes a tube guide block 100 for inserting a fluid transport tube 10 along a predetermined path, a tube compression block 200 for compressing the tube 10 inserted into the tube guide block 100 to transport the fluid, an air cylinder 300 for moving the tube compression block 200, and an elastic member 400 for applying an elastic force to the air cylinder 300.

[0022] The tube guide block 100 includes a tube insertion path 110 designed to expose a portion of the fluid transport tube 10 to the outside. The tube 10 is inserted onto the tube insertion path 110, with a portion of the tube 10 exposed to the outside, and is compressed by the tube compression block 200.

[0023] The tube compression block 200 is disposed so as to be capable of reciprocating motion, i.e., moving forward and backward, on the tube guide block 100. In addition, while moving forward and backward, the tube compression block 200 compresses the exposed portion of the tube 10 inserted into the tube guide block 100, so that the fluid in the tube 10 is transported.

[0024] The air cylinder 300 includes a rod 310 connected to the tube compression block 200, and uses compressed air to reciprocate the rod 310 in a linear direction, thereby reciprocating the tube compression block 200. That is, the air cylinder 300 uses compressed air to enable the rod 310 to perform piston motion.

[0025] The elastic member 400 applies an elastic force to the air cylinder 300 so that the tube compression block 200 connected to the rod 310 of the air cylinder 300 is pressed downward, thereby enabling the tube compression block 200 to compress the tube 10.

[0026] With this configuration of the present invention, when the air cylinder 300 is operated and the rod 310 reciprocates in a linear direction, the fluid in the tube 10 is transported when the tube compression block 200 advances, and the transport of the fluid in the tube 10 is stopped when the tube compression block 200 retreats. Then, according to the forward and backward movements of the tube compression block 200, a fixed amount of the fluid in the tube 10 can be discharged.

[0027] Furthermore, since the fluid constant rate transport pump according to the present invention is not electrically operated but is operated using compressed air, it can be safely used in explosion-proof products and explosion-proof areas.

[0028] Preferably, the tube guide block 100 includes a guide rail 120 and a tube insertion path 110. The guide rail 120 extends on the upper surface of the tube guide block 100 in the same direction as the movement direction of the rod 310 of the air cylinder 300, and serves to guide the reciprocating movement, i.e., forward and backward movement, of the tube compression block 200. In addition, the tube insertion path 110 is formed on the lower part of the guide rail 120, has a cross section that is approximately "∩" shaped when viewed from the side, and has a straight path whose upper side is exposed to the outside on the guide rail 120.

[0029] With such a configuration of the tube guide block 100, the tube 10 inserted into the tube insertion path 110 is exposed to the outside by a predetermined length in a linear direction on the guide rail 120 and compressed by the tube compression block 200. Here, the tube compression block 200 compresses only the predetermined length of the tube 10 exposed to the outside on the guide rail 120 during reciprocating movement, so that a fixed amount of fluid can be transported.

[0030] On the other hand, the tube compression block 200 includes a pair of side plates 210, a connecting rod 220 that connects the pair of side plates 210, and a roller member 230 that directly compresses the tube 10.

[0031] The pair of side plates 210 are spaced apart from each other at an interval corresponding to the width of the tube guide block 100. The connecting rod 220 extends between the pair of side plates 210 in a direction perpendicular to the length direction of the rod 310, and connects the pair of side plates 210. The connecting rod 220 is disposed on the upper side of the center of the side plates 210 and is coupled to the rod 310 of the air cylinder 300, so that the tube compression block 200 including the side plates 210 moves when the rod 310 moves. The roller member 230 includes a rotating shaft 231 connected between the pair of side plates 210 and a roller 232 formed on the rotating shaft 231. The rotating shaft 231 is rotatably installed on the lower side of the side plate 210, and the roller 232 is formed integrally with the rotating shaft 231, and compresses the tube 10 while sliding or rolling along the guide rail 120 when the tube compression block 200 moves.

[0032] Here, the roller member 230 includes a first roller member 230a provided on the rear side of the side plate 210 and a second roller member 230b provided on the front side of the side plate 210. In addition, the distance between the first roller member 230a and the second roller member 230b is designed to correspond to the length of the tube (10) exposed to the outside on the guide rail 120.

[0033] In the fluid constant-rate transport pump according to the present invention, before operation, the exposed portion of the tube 10 is located between the first roller member 230a and the second roller member 230b as shown in Fig. 2. Then, when the air cylinder 300 is operated and the rod 310 advances, i.e., when the tube compression block 200 advances, the tube 10 is compressed by the first roller member 230a and the fluid is transported (see Fig. 4a), and when the rod 310 moves backward, i.e., when the tube compression block 200 moves backward, the tube 10 is compressed by the second roller member 230b and the fluid transport is stopped (see Fig. 4b).

[0034] Furthermore, the guide rail 120 may be composed of a plurality of guide rails according to product specifications. In this case, the guide rails 120 are arranged apart from each other along a direction perpendicular to the moving direction of the tube compression block 200, and the above-mentioned tube insertion path 110 is formed in each guide rail, and the roller member 230 is also provided with rollers 232 in a number corresponding to the number of guide rails. Therefore, fluid transport of a plurality of tubes is possible. Although two guide rails 120 and two rollers 232 are disclosed in this specification, the number of guide rails and rollers may be three or more according to the design specifications of the product.

[0035] Meanwhile, the elastic member 400 may be a compression spring, a tension spring, a torsion spring or a leaf spring, and any type of spring may be used as long as it can pressurize the air cylinder 300 upward.

[0036] Here, the elastic member 300 is installed between the tube guide block 100 (or a frame formed integrally with the tube guide block 100) and the air cylinder 300, and presses the air cylinder 300 upward. Then, the tube compression block 200 connected to the rod 310 of the air cylinder 300 is pressed downward.

[0037] In order to stably pressurize the tube compression block 200, the air cylinder 300 is configured to be able to rotate up and down around the elastic member 400. Referring to Fig. 5a, the air cylinder 300 is not directly connected to the tube guide block 100 except for the elastic member 400. In addition, the elastic member 400 is disposed outwardly in a direction away from the tube compression block 200 from the center of the length of the air cylinder 300. Therefore, the rear side of the air cylinder 300 is pressurized upward by the elastic force of the elastic member 400, and at the same time, the front side of the air cylinder 300 rotates downward, so that the rod 310 and the tube compression block 200 are pressurized downward.

[0038] Because the air cylinder 300 is configured to be able to rotate up and down, even if the diameter of the fluid transport tube is smaller than the appropriate value, the tube compression block 200 can stably and accurately press the tube, making it possible to discharge a fixed amount of fluid.

[0039] 4b, 5b and 5c, the tube compression block 200 is connected to the rod 310 of the air cylinder 300 so as to be rotatable around the connecting rod 220. Specifically, the connecting rod 220 of the tube compression block 200 and the rod 310 of the air cylinder 300 are connected to be rotatable around the connecting rod 220.

[0040] Due to the rotatable configuration of the tube compression block 200, even if the diameter of the fluid transport tube is larger than the appropriate value or the shape of the fluid transport tube is different, the air cylinder 300 and the tube compression block 200 can rotate and stably press the tube, making it possible to discharge a fixed amount of fluid.

[0041] Furthermore, as shown in FIG. 5c, the tube compression block 200 is connected to a rod 310 of an air cylinder 300 so as to be tiltable left and right along the width direction of the tube guide block 100.

[0042] Such a tiltable configuration of the tube compression block 200 also enables stable compression of the tube, enabling the constant amount of fluid to be dispensed. The invention as originally claimed in the present application is set forth below. [1] A tube guide block into which a fluid transport tube is inserted so that a portion of the tube is exposed; a tube compression block arranged to be reciprocable on the tube guide block and configured to compress an exposed portion of a tube inserted into the tube guide block so as to transport a fluid; an air cylinder including a rod connected to the tube compression block, the air cylinder using compressed air to reciprocate the rod in a linear direction, thereby reciprocating the tube compression block; and an elastic member that applies an elastic force to the air cylinder so that the tube compression block compresses the tube. [2] The tube guide block is A guide rail for guiding the reciprocating movement of the tube compression block; a tube insertion path formed in a lower portion of the guide rail, having a cross section shaped like an "∩" when viewed from the side, and having a straight path whose upper side is exposed to the outside on the guide rail; The fluid quantitative transport pump according to [1], characterized in that the tube inserted into the tube insertion path is exposed to the outside on the guide rail and is compressed by the tube compression block. [3] The tube compression block is A pair of side plates arranged side by side and spaced apart from each other; a connecting rod disposed between the pair of side plates, connecting the pair of side plates and being coupled to the rod; The fluid constant-rate transport pump described in [2] is characterized in that it includes a roller member that is rotatably installed between the pair of side plates and compresses the tube while sliding or rolling along the guide rail. [4] The roller members include a first roller member provided on a rear side of the side plate and a second roller member provided on a front side of the side plate, and a distance between the first roller member and the second roller member corresponds to a length of the tube exposed to the outside on the guide rail, The fluid quantitative transport pump described in [3] is characterized in that the first roller member allows the fluid in the tube to be transported when the tube compression block moves forward, and the second roller member blocks the transport of the fluid in the tube when the tube compression block moves backward. [5] The guide rail comprises a plurality of guide rails spaced apart from each other along a direction perpendicular to the moving direction of the tube compression block, and each guide rail is formed with the tube insertion path, The fluid constant-rate transport pump according to [3], characterized in that the roller member has rollers the number of which corresponds to the number of the guide rails, and is capable of transporting fluid through a plurality of tubes. [6] The elastic member is a compression spring, a tension spring, a torsion spring, or a leaf spring; The fluid constant-rate transport pump according to [1], characterized in that the elastic member is installed between the air cylinder and the tube guide block or a frame formed integrally with the tube guide block, and by pressurizing the air cylinder upward, the tube compression block connected to the rod of the air cylinder is pressurized downward. [7] The fluid constant-volume transport pump described in [6], characterized in that the air cylinder is configured to be rotatable up and down around the elastic member as an axis. [8] The fluid quantitative transport pump described in [7], characterized in that the tube compression block is rotatably connected to the rod of the air cylinder with a connecting rod as an axis. [9] A fluid quantitative transport pump as described in [6] or [7], characterized in that the tube compression block is connected to the rod of the air cylinder so as to be tiltable left and right along the width direction of the tube guide block.

Claims

1. a tube guide block into which the fluid transport tube is inserted so as to be partially exposed; a tube compression block arranged to be reciprocable on the tube guide block and configured to compress an exposed portion of a tube inserted into the tube guide block so as to transport a fluid; an air cylinder including a rod connected to the tube compression block, the air cylinder using compressed air to reciprocate the rod in a linear direction, thereby reciprocating the tube compression block; an elastic member for applying an elastic force to the air cylinder so that the tube compression block compresses the tube; The elastic member is a compression spring, a tension spring, a torsion spring, or a leaf spring, The elastic member is installed between the tube guide block or a frame formed integrally with the tube guide block and the air cylinder, and pressurizes the air cylinder upward to pressurize the tube compression block connected to the rod of the air cylinder downward.

2. The tube guide block includes: A guide rail for guiding the reciprocating movement of the tube compression block; a tube insertion path formed in a lower portion of the guide rail, having a cross section shaped like an "∩" when viewed from the side, and having a straight path whose upper side is exposed to the outside on the guide rail; 2. The fluid constant-rate transport pump according to claim 1, wherein the tube inserted into the tube insertion path is exposed to the outside on the guide rail and compressed by the tube compression block.

3. The tube compression block comprises: A pair of side plates arranged side by side and spaced apart from each other; a connecting rod disposed between the pair of side plates, connecting the pair of side plates and being coupled to the rod; 3. The fluid constant-rate transport pump according to claim 2, further comprising a roller member rotatably installed between the pair of side plates and compressing the tube while sliding or rolling along the guide rail.

4. the roller members include a first roller member provided on a rear side of the side plate and a second roller member provided on a front side of the side plate, a distance between the first roller member and the second roller member corresponds to a length of the tube exposed to the outside on the guide rail, 4. The fluid constant-rate transport pump according to claim 3, wherein the first roller member transports the fluid in the tube when the tube compression block moves forward, and the second roller member blocks the transport of the fluid in the tube when the tube compression block moves backward.

5. The guide rail includes a plurality of guide rails spaced apart from each other along a direction perpendicular to a moving direction of the tube compression block, and the tube insertion path is formed in each guide rail, 4. The fluid constant rate transport pump according to claim 3, wherein the roller member includes rollers the number of which corresponds to the number of the guide rails, and is capable of transporting fluid through a plurality of tubes.

6. 2. The fluid constant rate transport pump according to claim 1, wherein the air cylinder is configured to be rotatable up and down around the elastic member as an axis.

7. 7. The fluid constant rate transport pump according to claim 6, wherein the tube compression block is connected to the rod of the air cylinder so as to be rotatable about a connecting rod as an axis.

8. 7. The fluid constant rate transport pump according to claim 1 or 6, wherein the tube compression block is connected to the rod of the air cylinder so as to be tiltable left and right along a width direction of the tube guide block.

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