One-way valve and diaphragm pump thereof

Abstract

According to the one-way valve, in the working process, the normal flowing direction of fluid is that the fluid enters from the input end of the inserting pipe and is discharged from the output end of the liquid discharging pipe through the liquid discharging pipe. In the process, the fluid ejects the blocking ball away from the liquid outlet nozzle, and the fluid is discharged through a gap between the blocking ball and the inner wall of the liquid discharging pipe. When the diaphragm pump needs to be cleaned in the reverse direction, the output end of the external solvent pipe inputs the solvent towards the output end of the liquid discharging pipe. An external air source introduces high-pressure air into the sliding cavity through the air inlet pipe, the sealing piston is pushed by air pressure to drive the conical driving head on the ejector head through the driving rod to move close to the bottom of the blocking ball, the blocking ball is ejected open from the liquid outlet nozzle, and the inserting pipe is controlled to be opened. Therefore, the solvent can flow back through a gap between the blocking ball and the inner wall of the liquid discharge pipe. And the diaphragm pump is subjected to reverse cleaning. The one-way valve is ingenious in design, low in cost, capable of changing the flow direction and beneficial to reverse cleaning of the diaphragm pump.

Description

Technical Field

[0001] The utility model relates to the field of one-way valves, in particular to a one-way valve and a diaphragm pump thereof. Background Art

[0002] A one-way valve is a valve that allows fluid to flow only along the inlet, but the medium at the outlet cannot flow back. It is commonly known as a one-way valve. A one-way valve is also called a check valve or a non-return valve. It is used in hydraulic systems to prevent oil from flowing in the opposite direction, or in pneumatic systems to prevent compressed air from flowing in the opposite direction. There are two types of one-way valves: straight-through and right-angle. Straight-through one-way valves are installed on the pipeline with threaded connections. Right-angle one-way valves have three types: threaded connection, plate connection, and flange connection. A hydraulically controlled one-way valve is also called a locking valve or a pressure-maintaining valve. It is the same as a one-way valve and is used to prevent the reverse flow of oil. However, when the oil flow needs to flow in the opposite direction in the hydraulic circuit, the oil pressure can be controlled to open the one-way valve so that the oil flow can flow in both directions. The hydraulically controlled one-way valve uses a conical valve core, so it has good sealing performance. When the oil circuit is required to be closed, this valve can be used as a one-way lock for the oil circuit to maintain pressure. There are two ways for hydraulically controlled one-way valves to control oil leakage: internal leakage and external leakage. The internal leakage type can be used in the oil circuit where there is no back pressure at the oil flow reverse outlet; otherwise, the external leakage type is required to reduce the control oil pressure.

[0003] However, conventional one-way valves, such as the technical solution disclosed in the patent with application number CN201710663311.X and invention name "one-way valve", are usually set at the output and input ends of the diaphragm pump to control the flow direction of the fluid. However, conventional one-way valves cannot change the flow direction, which is not conducive to the reverse cleaning of the diaphragm pump. Utility Model Content

[0004] Based on this, it is necessary to provide a one-way valve to address the technical problem that the traditional diaphragm pump cannot change the flow direction after using the one-way valve, which is not conducive to reverse cleaning.

[0005] A one-way valve, comprising: an insertion pipe, a liquid discharge pipe and an adjustment mechanism;

[0006] The output end of the insertion tube is connected to the input end of the drainage tube; the output end of the insertion tube is provided with a liquid outlet nozzle, and the liquid outlet nozzle is a ring structure; the liquid outlet nozzle is accommodated in the input end of the drainage tube; the output end of the drainage tube is evenly provided with a plurality of limit blocks; a lifting hole is opened on the side wall of the input end of the drainage tube;

[0007] The regulating mechanism comprises a socket, an air inlet pipe, an air discharge pipe, a blocking ball, a tension spring, a sealing piston, a driving rod and a top head; a fixing hole is provided at one end of the socket, and the insertion pipe and the discharge pipe are both adapted to the socket, and the output end of the insertion pipe and the discharge pipe are both inserted in the fixing hole and connected to the socket; a sliding cavity is provided in the socket, and a sliding hole is provided on the side wall of the sliding cavity; an air inlet hole and an air discharge hole are provided on the socket, and the air inlet hole and the air discharge hole are both connected with one end of the sliding cavity away from the sliding hole; the air inlet pipe is inserted in the air inlet hole and connected with the sliding cavity, and the air discharge pipe is inserted in the air discharge hole and connected with the sliding cavity; the air inlet pipe is used to be connected with an external air source, and an air discharge valve is provided on the air discharge pipe;

[0008] The blocking ball is adapted to the liquid outlet nozzle, and the blocking ball is accommodated in the liquid discharge pipe; the blocking ball is received on the liquid outlet nozzle to block the output end of the inserted tube; the tension spring and the sealing piston are both accommodated in the sliding chamber, one end of the tension spring is connected to the inner wall of the sliding chamber away from the sliding hole, and the other end of the tension spring is connected to the sealing piston, the sealing piston is adapted to the sliding chamber, the sealing piston is inserted in the sliding chamber and slidably connected to the receiving seat; one end of the driving rod is connected to the end of the sealing piston facing away from the tension spring, and the end of the driving rod away from the sealing piston is connected to the top head; the end of the top head away from the driving rod is a conical driving head; the driving rod is adapted to the sliding hole, the driving rod is inserted in the sliding hole and slidably connected to the receiving seat, the top head is adapted to the lifting hole, the top head is inserted in the top hole and slidably connected to the liquid discharge pipe;

[0009] Driven by air pressure, the sealing piston drives the conical driving head on the top head through the driving rod to move close to the bottom of the blocking ball, pushing the blocking ball away from the liquid outlet nozzle to control the opening of the insertion tube; each limit block is used to limit the position of the blocking ball to prevent the blocking ball from falling out of the discharge pipe.

[0010] In one of the embodiments, a limiting arc surface is provided at the bottom of each of the limiting blocks, and the limiting arc surface is matched with the blocking ball, and the blocking ball can abut against each of the limiting arc surfaces.

[0011] In one of the embodiments, two threaded holes are formed at one end of the receiving seat for connection with the diaphragm pump via bolts.

[0012] In one of the embodiments, a first sealing groove is formed at one end of the fixing hole close to the insertion tube, and a first sealing ring is disposed in the first sealing groove of the receiving seat.

[0013] In one embodiment, the first sealing ring is a soft rubber ring.

[0014] In one embodiment, the first sealing ring is a soft silicone ring.

[0015] In one of the embodiments, a second sealing groove is formed at one end of the fixing hole away from the insertion tube, and a second sealing ring is disposed in the second sealing groove of the receiving seat.

[0016] In one embodiment, the second sealing ring is a soft rubber ring.

[0017] In one embodiment, the second sealing ring is a soft silicone ring.

[0018] A diaphragm pump, wherein two input ends and two output ends of the diaphragm pump are both provided with the one-way valve described in any one of the above embodiments.

[0019] The above-mentioned one-way valve is used to be placed at the two input ends and two output ends of the diaphragm pump. During the working process, the normal flow direction of the fluid is: entering from the input end of the plug tube and being discharged from the output end of the discharge tube through the discharge tube. In this process, the fluid pushes the blocking ball away from the liquid outlet nozzle, and the fluid is discharged through the gap between the blocking ball and the inner wall of the discharge tube. When the diaphragm pump needs to be cleaned in the reverse direction, the output end of the external solvent tube inputs the solvent toward the output end of the discharge tube. The external air source introduces high-pressure air into the sliding cavity through the air inlet pipe. Under the push of the air pressure, the sealing piston drives the conical driving head on the top head through the driving rod to move close to the bottom of the blocking ball, pushing the blocking ball away from the liquid outlet nozzle to control the opening of the plug tube. This allows the solvent to flow back down through the gap between the blocking ball and the inner wall of the discharge tube. The diaphragm pump is reversely cleaned. After the reverse cleaning is completed, the external air source stops supplying air to the air inlet pipe. The vent valve opens, the tension spring recovers its elastic deformation, and the sealing piston pulls the driving rod and the top head to reset, so as to restore the one-way flow direction of the one-way valve. The one-way valve is exquisitely designed, low-cost, can change the flow direction, and is conducive to reverse cleaning of the diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a one-way valve in one embodiment;

[0021] Figure 2 for Figure 1 A schematic structural diagram of the one-way valve from another perspective in the embodiment;

[0022] Figure 3 A schematic diagram of the structure of a one-way valve in one embodiment;

[0023] Figure 4A schematic diagram of a partial structure of a one-way valve in one embodiment;

[0024] Figure 5 A schematic diagram of a partial structure of a one-way valve in one embodiment;

[0025] Figure 6 Schematic diagram of the structure of a diaphragm pump in one embodiment. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth so as to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below. In the description of the utility model, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or position relationship shown in the accompanying drawings, only for the convenience of describing the 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 cannot be understood as a limitation to the utility model.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] Please also read Figures 1 to 5 The utility model provides a one-way valve 10 , which includes: an insertion tube 100 , a discharge tube 200 and an adjustment mechanism 300 .

[0032] The output end of the insertion tube 100 is connected to the input end of the liquid discharge tube 200. The output end of the insertion tube 100 is provided with a liquid outlet nozzle 110, and the liquid outlet nozzle 110 is a ring structure. The liquid outlet nozzle 110 is accommodated in the input end of the liquid discharge tube 200. The output end of the liquid discharge tube 200 is evenly provided with a plurality of limit blocks 210. A lifting hole 201 is opened on the side wall of the input end of the liquid discharge tube 200.

[0033] The regulating mechanism 300 includes a receiving seat 310, an air inlet pipe (not shown), an air discharge pipe (not shown), a blocking ball 320, a tension spring 330, a sealing piston 340, a driving rod 350 and a top head 360. A fixing hole 301 is provided at one end of the receiving seat 310, and the insertion tube 100 and the discharge tube 200 are both adapted to the receiving seat 310. The output end of the insertion tube 100 and the discharge tube 200 are both inserted in the fixing hole 301 and connected to the receiving seat 310. A sliding cavity 302 is provided in the receiving seat 310, and a sliding hole 303 is provided on the side wall of the sliding cavity 302. An air inlet hole 304 and an air discharge hole 305 are provided on the receiving seat 310, and the air inlet hole 304 and the air discharge hole 305 are both connected to one end of the sliding cavity 302 away from the sliding hole 303. The air inlet pipe is inserted into the air inlet hole 304 and communicated with the sliding cavity 302, and the air discharge pipe is inserted into the air discharge hole 305 and communicated with the sliding cavity 302. The air inlet pipe is used to communicate with the external air source, and the air discharge pipe is provided with an air discharge valve. In this embodiment, two threaded holes 308 are provided at one end of the receiving seat 310 for connecting with the diaphragm pump 20 through bolts.

[0034] The blocking ball 320 is matched with the liquid outlet nozzle 110, and the blocking ball 320 is accommodated in the liquid discharge pipe 200. The blocking ball 320 is received on the liquid outlet nozzle 110 to block the output end of the insertion tube 100. The tension spring 330 and the sealing piston 340 are both accommodated in the sliding chamber 302, one end of the tension spring 330 is connected to the inner wall of the end of the sliding chamber 302 away from the sliding hole 303, and the other end of the tension spring 330 is connected to the sealing piston 340, the sealing piston 340 is matched with the sliding chamber 302, and the sealing piston 340 is inserted in the sliding chamber 302 and slidably connected with the receiving seat 310. One end of the driving rod 350 is connected to the end of the sealing piston 340 facing away from the tension spring 330, and the end of the driving rod 350 away from the sealing piston 340 is connected to the head 360. The end of the head 360 away from the driving rod 350 is a conical driving head 361. The driving rod 350 is adapted to the sliding hole 303 , inserted in the sliding hole 303 and slidably connected to the receiving seat 310 , and the top head 360 is adapted to the lifting hole 201 , inserted in the lifting hole 201 and slidably connected to the discharge pipe 200 .

[0035] Under the push of air pressure, the sealing piston 340 drives the conical driving head 361 on the top head 360 to move close to the bottom of the blocking ball 320 through the driving rod 350, and pushes the blocking ball 320 away from the liquid outlet nozzle 110 to control the opening of the insertion tube 100. Each limit block 210 is used to limit the position of the blocking ball 320 to prevent the blocking ball 320 from falling out of the discharge pipe 200. In this embodiment, the bottom of the limit block 210 is provided with a limit arc surface, which is adapted to the blocking ball 320, and the blocking ball 320 can abut against each limit arc surface.

[0036] In order to increase the sealing performance at the bottom of the one-way valve 10, in one embodiment, a first sealing groove 306 is opened at one end of the fixing hole 301 close to the insertion tube 100, and a first sealing ring 311 is provided in the first sealing groove 306 of the receiving seat 310. The first sealing ring 311 is a soft rubber ring. In another embodiment, the first sealing ring 311 is a soft silicone ring. During the connection of the one-way valve 10 with the diaphragm pump 20, the insertion tube 100 is inserted into the input end or the output end of the diaphragm pump 20, and the receiving seat 310 abuts against the input end or the output end of the diaphragm pump 20, and the first sealing ring 311 can increase the sealing performance of the input end of the one-way valve 10. In this way, the first sealing ring 311 increases the sealing performance of the bottom of the one-way valve 10.

[0037] In order to increase the sealing performance of the top of the one-way valve 10, in one embodiment, a second sealing groove 307 is opened at one end of the fixing hole 301 away from the insertion tube 100, and the receiving seat 310 is provided with a second sealing ring 312 in the second sealing groove 307. The second sealing ring 312 is a soft rubber ring. In another embodiment, the second sealing ring 312 is a soft silicone ring. When the one-way valve 10 is connected to the diaphragm pump 20, the receiving seat 310 abuts against the input end or the output end of the diaphragm pump 20, and the first sealing ring 311 can increase the sealing performance of the output end of the one-way valve 10. In this way, the first sealing ring 311 increases the sealing performance of the top of the one-way valve 10.

[0038] See also Figure 6 The utility model further provides a diaphragm pump 20, and both input ends and two output ends of the diaphragm pump 20 are provided with the one-way valve 10 in any of the above embodiments.

[0039] The one-way valve 10 is used to be placed at the two input ends and the two output ends of the diaphragm pump 20. During operation, the normal flow direction of the fluid is: entering from the input end of the insertion tube 100, passing through the discharge tube 200 and being discharged from the output end of the discharge tube 200. In this process, the fluid pushes the blocking ball 320 away from the liquid outlet nozzle 110, and the fluid is discharged through the gap between the blocking ball 320 and the inner wall of the discharge tube 200. When the diaphragm pump 20 needs to be cleaned in the reverse direction, the output end of the external solvent tube inputs the solvent toward the output end of the discharge tube 200. The external air source introduces high-pressure air toward the sliding cavity 302 through the air inlet pipe. Under the push of the air pressure, the sealing piston 340 drives the conical driving head 361 on the top head 360 through the driving rod 350 to move close to the bottom of the blocking ball 320, and pushes the blocking ball 320 away from the liquid outlet nozzle 110 to control the opening of the insertion tube 100. The solvent can flow backward through the gap between the plugging ball 320 and the inner wall of the discharge pipe 200. The diaphragm pump 20 is reversely cleaned. After the reverse cleaning is completed, the external air source stops supplying air to the air inlet pipe. The air release valve is opened, the tension spring 330 restores its elastic deformation, and the driving rod 350 and the top head 360 are pulled back through the sealing piston 340 to restore the unidirectional flow direction of the one-way valve 10. The one-way valve 10 is exquisitely designed, low-cost, and can change the flow direction, which is conducive to the reverse cleaning of the diaphragm pump 20.

[0040] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A one-way valve, characterized in that: include: Insertion pipes, drainage pipes and regulating mechanisms; The output end of the insertion tube is connected to the input end of the drainage tube; the output end of the insertion tube is provided with a liquid outlet nozzle, and the liquid outlet nozzle is a ring structure; the liquid outlet nozzle is accommodated in the input end of the drainage tube; the output end of the drainage tube is evenly provided with a plurality of limit blocks; a lifting hole is opened on the side wall of the input end of the drainage tube; The regulating mechanism comprises a socket, an air inlet pipe, an air discharge pipe, a blocking ball, a tension spring, a sealing piston, a driving rod and a top head; a fixing hole is provided at one end of the socket, and the insertion pipe and the discharge pipe are both adapted to the socket, and the output end of the insertion pipe and the discharge pipe are both inserted in the fixing hole and connected to the socket; a sliding cavity is provided in the socket, and a sliding hole is provided on the side wall of the sliding cavity; an air inlet hole and an air discharge hole are provided on the socket, and the air inlet hole and the air discharge hole are both connected with one end of the sliding cavity away from the sliding hole; the air inlet pipe is inserted in the air inlet hole and connected with the sliding cavity, and the air discharge pipe is inserted in the air discharge hole and connected with the sliding cavity; the air inlet pipe is used to be connected with an external air source, and an air discharge valve is provided on the air discharge pipe; The blocking ball is adapted to the liquid outlet nozzle, and the blocking ball is accommodated in the liquid discharge pipe; the blocking ball is received on the liquid outlet nozzle to block the output end of the inserted tube; the tension spring and the sealing piston are both accommodated in the sliding chamber, one end of the tension spring is connected to the inner wall of the sliding chamber away from the sliding hole, and the other end of the tension spring is connected to the sealing piston, the sealing piston is adapted to the sliding chamber, the sealing piston is inserted in the sliding chamber and slidably connected to the receiving seat; one end of the driving rod is connected to the end of the sealing piston facing away from the tension spring, and the end of the driving rod away from the sealing piston is connected to the top head; the end of the top head away from the driving rod is a conical driving head; the driving rod is adapted to the sliding hole, the driving rod is inserted in the sliding hole and slidably connected to the receiving seat, the top head is adapted to the lifting hole, the top head is inserted in the top hole and slidably connected to the liquid discharge pipe; Driven by air pressure, the sealing piston drives the conical driving head on the top head through the driving rod to move close to the bottom of the blocking ball, pushing the blocking ball away from the liquid outlet nozzle to control the opening of the insertion tube; each limit block is used to limit the position of the blocking ball to prevent the blocking ball from falling out of the discharge pipe.

2. The one-way valve according to claim 1, characterized in that: The bottom of the limiting block is provided with a limiting arc surface, the limiting arc surface is matched with the blocking ball, and the blocking ball can abut against each of the limiting arc surfaces.

3. The one-way valve according to claim 1, characterized in that: One end of the receiving seat is provided with two threaded holes for connecting with the diaphragm pump through bolts.

4. The one-way valve according to claim 1, characterized in that: The fixing hole is provided with a first sealing groove at one end close to the insertion tube, and the receiving seat is provided with a first sealing ring in the first sealing groove.

5. The one-way valve according to claim 4, characterized in that: The first sealing ring is a soft rubber ring.

6. The one-way valve according to claim 4, characterized in that: The first sealing ring is a soft silicone ring.

7. The one-way valve according to claim 1, characterized in that: A second sealing groove is formed at one end of the fixing hole away from the insertion tube, and a second sealing ring is disposed in the second sealing groove of the receiving seat.

8. The one-way valve according to claim 7, characterized in that: The second sealing ring is a soft rubber ring.

9. The one-way valve according to claim 7, characterized in that: The second sealing ring is a soft silicone ring.

10. A diaphragm pump, characterized in that: Both the two input ends and the two output ends of the diaphragm pump are provided with the one-way valve according to any one of claims 1 to 9.

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