Novel diaphragm metering pump integrated check valve

Abstract

The application discloses a novel diaphragm metering pump integrated check valve, and solves the problem of frequent damage of a traditional check valve in a solid particle fluid medium. A Hastelloy steel base is hot coupled with a zirconium oxide valve seat, three silicon nitride valve balls are uniformly arranged in the valve seat, a Hastelloy wrench-shaped valve guide is combined with an elliptical flow channel, the valve seat and the valve ball adopt a linear sealing mode, and the valve seat and the valve guide are fixedly connected through an external part and a positioning pin. The application has the following advantages: the valve has a tight sealing, a long service life, high precision, fast reaction speed, high medium conveying capacity, simple structure, convenient assembly and spring resetting guaranteeing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to a one-way valve, in particular to a novel diaphragm metering pump integrated one-way valve. BACKGROUND

[0002] When the one-way valve is used to transport the regenerated catalyst, due to the high temperature of the catalyst regeneration slurry, the existence of hard particles such as zirconium oxide, and the high outlet pressure, the difficulty of transportation is high and the transportation state is poor.

[0003] The traditional one-way valve has the following four shortcomings in use:

[0004] First, the low-inlet high-outlet feeding method is adopted, and because there are a large number of solid hard particles in the fluid, the inlet position is easily blocked.

[0005] Second, the single ball single seat method is adopted, and under high temperature and high pressure environment, the valve seat and the valve ball are easily impacted by solid particles, which can cause serious wear, and the service life of the one-way valve is low.

[0006] Third, the relatively expensive hastelloy alloy is used, and the loss is large, which leads to high production cost.

[0007] Fourth, the valve ball relies on its own gravity to return to the seat, which leads to long return time and reduces the transportation capacity.

[0008] The Chinese patent with publication number CN205744411U discloses a one-way valve applied to a fluid medium containing solid particles, which comprises a valve guide, a ceramic valve seat, a spring and a ceramic valve ball. The lower end of the valve guide is provided with an oval flow channel and a working flow channel, respectively. The working flow channel is provided with a working cavity and a valve ball movable cavity. The ceramic valve ball and the spring are arranged in the working cavity and the valve ball movable cavity, respectively. The upper end of the spring is pressed against the ceramic valve ball, and the lower end of the spring is pressed against the valve guide. The ceramic valve seat is provided with a working hole, and the ceramic valve seat is buckled on the valve guide. The working hole in the ceramic valve seat is opposite to the valve ball movable cavity in the valve guide, and the ceramic valve ball is pressed against the lower edge of the working hole. The oval flow channel and the working flow channel are connected through the valve ball movable cavity. Through this technical solution, the defects in the prior art are overcome, and the one-way valve has the advantages of tight sealing, long service life, high precision, fast reaction speed, strong medium conveying capacity, simple structure and convenient assembly.

[0009] However, although this one-way valve uses the spring's resilience to ensure strong conveying capacity of the one-way valve, it is found in actual use that the gap of the spring is easily filled with solid particles, which gradually reduces the resilience of the spring during use, and even disappears, eventually causing the valve ball to be fixed at the inlet position and unable to continue conveying the fluid medium. SUMMARY

[0010] The application aims to provide a novel diaphragm metering pump integrated check valve.

[0011] The application aims to provide a novel diaphragm metering pump integrated check valve.

[0012] When the fluid medium impacts the valve ball, the valve ball moves downward, so that the spring one accumulates the rebound force. At this time, the fluid medium passes through the gap between the valve ball and the valve seat through the check valve. Then, the spring one rebounds, so that the valve ball closes the channel of the fluid medium. The above process is repeated, and the valve ball bounces back and forth due to the existence of the spring one, so as to ensure the conveying efficiency. In the long-term use process, solid particles will adhere to the gap between the spring one. In order to solve the problem, the application adds the sliding block, so that the rebound force of the spring one is released on the sliding block. When the sliding block moves downward, the external force is applied to the spring two, so that the spring two accumulates the elastic force. In the above process, the spring two does not directly contact the fluid particles, so that the problem of accumulating solid particles does not exist. At the same time, the range of the spring one can be ensured to increase. The displacement of the spring one is larger, the movement amplitude is larger, the possibility of solid particles adhering to the gap is reduced, so that the problem of the rebound force of the spring one gradually disappearing is solved.

[0013] The application is further provided as follows: the bottom of the sliding block is fixedly connected with a pressing rod, the spring two is wound outside the pressing rod, the bottom of the pressing rod is provided with a sharp end, the installation seat is provided with a wedge-shaped block corresponding to the sharp end, one end of the wedge-shaped block is abutted with a sealing ball, the installation seat is provided with a sealing cavity corresponding to the sealing ball, the sealing ball is connected with a spring three on one side, and the spring three is fixedly connected with the valve guide.

[0014] By adopting the above technical scheme, after long-term use, solid particles accumulate in the gap between the mounting seat and the valve guide, which will seriously affect the sliding effect of the sliding block. At this time, it needs to be cleaned. In the prior art, it is often scrapped after use, and the mounting seat can be separated from the valve guide to ensure multiple use. When the solid particles in the fluid medium accumulate in the gap, the sliding difficulty of the sliding block gradually increases, eventually leading to the gradual decrease of the spring two rebound force, and eventually the valve ball is fully opened, losing the function of the check valve. At this time, the sliding block will move downward to the bottom, driving the pressure rod to move, the tip of the pressure rod exerts pressure on the wedge-shaped block, so that the two wedge-shaped blocks move to the two sides, and the sealing ball moves outward during the movement of the wedge-shaped block, so that the sealing ball leaves the sealing cavity. At this time, the sealing ball no longer fixes the mounting seat and seals the mounting seat. When the staff finds that the fluid leaks, the staff can manually close the check valve and directly pull the tip to pull out the entire mounting seat from the valve guide to clean the solid particles in the check valve and on the mounting seat, and then the mounting seat can be installed back to continue to use.

[0015] The application further provides that the valve guide is internally provided with a guide surface.

[0016] By adopting the above technical scheme, the fluid medium passes through the guide surface after passing through the valve ball, greatly reducing the possibility of solid medium entering the gap between the valve guide and the mounting seat, and reducing the frequency of maintenance and cleaning. At the same time, the fluid medium can be more easily transported, improving the transport efficiency.

[0017] The application further provides that a gap is arranged between the valve guide and the mounting seat, and a guide block fixedly connected with the mounting seat is arranged at the bottom of the gap.

[0018] By adopting the above technical scheme, when the solid particles enter the gap, the solid particles can accumulate on the guide block due to the arrangement of the guide block. When the amount of solid particles accumulated is large, the sliding block will be subjected to a lateral force on the guide block, making it more and more difficult to rebound, and eventually the tip at the bottom of the sliding block pushes the wedge-shaped block, reminding the staff to clean.

[0019] The application further provides that the valve guide is connected with a valve seat, the plurality of valve balls are arranged at the bottom of the valve seat, and a base is further arranged outside the valve seat.

[0020] By adopting the above technical scheme, the valve balls are arranged between the valve seat and the valve guide by arranging the valve seat and the base, thereby ensuring the connection stability.

[0021] The application further provides that a sealing gasket is arranged between the base, the valve guide and the valve seat.

[0022] Through adoption of the above technical scheme, through the setting of the sealing gasket, accidental fluid leakage problems do not occur in the working process.

[0023] To sum up, the present application has the following beneficial purposes:

[0024] 1. The first creative point of the present application is that the problem of using a single spring in the past is abandoned, and the elastic member combination between spring one and spring two is used to improve the movement distance of spring one, so that solid particles are not easily accumulated between the spring gaps in the use process of spring one, and the service life of the overall one-way valve is prolonged.

[0025] 2. The second creative point of the present application is that the use of a detachable mounting seat setting makes the solid particles between the gaps of spring two more and more in the use process, eventually causing the wedge block to be difficult to rebound when the bottom pressure rod exerts pressure on the wedge block, forcing the sealing ball to leave the mounting seat, thereby causing artificial leakage problems, prompting the staff to handle.

[0026] 3. The third creative point of the present application is that when artificial leakage problems occur, the staff can easily pull the sharp end to move the mounting seat to the valve ball position out of the valve guide, so that the mounting seat and the valve guide are cleaned, facilitating secondary use. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic view of the embodiment;

[0028] Figure 2 It is a schematic view of the internal structure of the embodiment;

[0029] Figure 3 It is Figure 2 the enlarged view of area A in

[0030] Figure 4 It is Figure 1 a structural schematic view of the back side.

[0031] Reference signs: 1, valve seat; 2, valve guide; 3, base; 4, sealing gasket; 5, positioning pin; 6, inlet; 7, valve ball; 8, spring one; 9, sliding block; 10, spring two; 11, mounting seat; 12, pressure rod; 13, sharp end; 14, wedge block; 15, sealing ball; 16, spring three; 17, mounting hole; 18, guide surface; 19, gap; 20, guide block. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below in combination with the drawings.

[0033] The specific embodiment is only an explanation of the present application, which is not a limitation of the present application, and those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

[0034] As Figure 1 , Figure 4 shown, a new diaphragm metering pump set type check valve, including valve seat 1, valve guide 2, base 3. Valve guide 2 and valve seat 1 clamping, valve seat 1, valve guide 2 and base 3 are provided with sealing gasket 4. At the same time, the valve seat 1 and the valve guide 2 are provided with positioning pin 5, to ensure the connection between the valve seat 1 and the valve guide 2 is more stable, at the same time without positioning can realize installation.

[0035] As Figure 2 , Figure 3 shown, the valve seat 1 is provided with three inlets 6, the inner side of the inlet 6 is provided with a valve ball 7. The bottom of the valve ball 7 abuts the spring 8. The bottom of the spring 8 is fixedly connected with the sliding block 9. The sliding block 9 is slidingly connected with the spring 10. The spring 10 is fixedly connected with the mounting seat 11. The bottom of the sliding block 9 is fixedly connected with the pressure rod 12, and the spring 10 is wound around the pressure rod 12. The bottom of the pressure rod 12 is provided with a sharp end 13. The sharp end 13 is provided with a wedge block 14 corresponding to the sharp end 13 on both sides. The wedge block 14 abuts the sealing ball 15 on one side. The sealing ball 15 is fixedly connected with the spring 16 at one end. The spring 16 is fixedly connected with the valve guide 2. At the same time, the valve guide 2 is provided with mounting hole 17 for installing spring and sealing ball 15. Corresponding to the position of the sealing ball 15, the mounting seat 11 is provided with a sealing cavity. When the sealing ball 15 enters the sealing cavity, the mounting seat 11 is fixedly sealed.

[0036] Optimized, the valve guide 2 is provided with a guide surface 18. The setting of the guide surface 18 is beneficial to the flow of fluid medium along the guide surface 18, preventing the fluid from being retained in the valve guide 2, and ensuring the conveying efficiency.

[0037] Optimized, the gap 19 is provided between the valve guide 2 and the mounting seat 11, and the gap 19 is provided with the guide block 20 fixedly connected with the mounting seat 11 at the bottom. Through the setting of the guide block 20, when the solid particles accumulate too much, the pressure will be generated on the sliding block 9, so that the sliding block 9 cannot rebound, at this time the staff needs to clean and maintain.

[0038] The overall working process and effect:

[0039] When the fluid medium impacts the valve ball 7, the valve ball 7 moves downward, so that the spring one 8 accumulates the rebound force. At this time, the fluid medium passes through the gap between the valve ball 7 and the valve seat 1 through the check valve, and under the guiding action of the guide surface 18, the conveying efficiency of the fluid medium is high. Then, the spring one 8 rebounds, so that the valve ball 7 closes the channel of the fluid medium. The above process is repeated, and due to the existence of the spring one 8, the valve ball 7 rebounds back and forth to ensure the conveying efficiency. In the long-term use process, solid particles will adhere to the gap between the spring one 8, in order to solve this problem, the sliding block 9 is added, so that the rebound force of the spring one 8 is released on the sliding block 9, and the sliding block 9 moves downward to exert an external force on the spring two 10, so that the spring two 10 accumulates the elastic force. In the above process, since the spring two 10 is not directly in contact with the fluid particles, the problem of accumulating solid particles does not exist. At the same time, the range of the spring one 8 can be increased, the displacement of the spring one 8 is larger, the movement amplitude is larger, the possibility of solid particles adhering to the gap is reduced, so as to solve the problem that the rebound force of the spring one 8 gradually disappears.

[0040] After long-term use, solid particles accumulate in the gap 19 between the mounting seat 11 and the valve guide 2, and are obliquely accumulated in the gap 19 under the action of the guide block 20, which can seriously affect the sliding effect of the sliding block 9, so that the sliding block 9 cannot rebound. At this time, it needs to be cleaned. In the prior art, it is often scrapped after use, and the mounting seat 11 can be separated from the valve guide 2 to ensure multiple use. When the solid particles in the fluid medium accumulate in the gap 19, the sliding difficulty of the sliding block 9 gradually increases, and finally leads to the gradual decrease of the rebound force of the spring two 10, so that the valve ball 7 is fully opened and loses the function of the check valve. At this time, the sliding block 9 will move downward to the bottom, drive the pressing rod 12 to move, the sharp end 13 of the pressing rod 12 exerts pressure on the wedge block 14, so that the two wedge blocks 14 move to the two sides respectively, and the wedge block 14 drives the sealing ball 15 to move outward during the movement, so that the sealing ball 15 leaves the sealing cavity. At this time, the sealing ball 15 no longer fixes the mounting seat 11 and seals the mounting seat 11. When the staff finds that the fluid leaks, the sharp end 13 can be directly pulled out of the valve guide 2 after the check valve is manually closed, so as to clean the solid particles in the check valve and on the mounting seat 11, and then the mounting seat 11 can be installed back for continuous use.

Claims

1. A new type of diaphragm metering pump integrated check valve comprising a valve seat (1), a valve guide (2), characterized in that: The valve seat (1) is provided with a plurality of valve balls (7), the bottom of each valve ball (7) is connected with a spring (8), the bottom of the spring (8) is connected with a sliding block (9), the sliding block (9) is connected with a spring (10), and the spring (10) is connected with a mounting seat (11); the bottom of the sliding block (9) is fixedly connected with a pressure rod (12), the spring (10) is wound on the pressure rod (12), the bottom of the pressure rod (12) is provided with a pointed end (13), the mounting seat (11) is provided with a wedge-shaped block (14) corresponding to the pointed end (13), one end of the wedge-shaped block (14) is abutted with a sealing ball (15), the mounting seat (11) is provided with a sealing cavity corresponding to the sealing ball (15) and capable of clamping the sealing ball (15), one side of the sealing ball (15) is connected with a spring (16), and the spring (16) is fixedly connected with a valve guide (2); the valve guide (2) is provided with a guide surface (18).

2. A new diaphragm metering pump integrated check valve according to claim 1, characterized in that: The valve guide (2) and the mounting seat (11) are provided with a gap (19), and the bottom of the gap (19) is provided with a guide block (20) fixedly connected with the mounting seat (11).

3. A new type of diaphragm metering pump integrated check valve according to claim 1, characterized in that: The valve guide (2) is connected with the valve seat (1), the plurality of valve balls (7) are arranged at the bottom of the valve seat (1), and the valve seat (1) is further provided with a base (3).

4. A new type of diaphragm metering pump integrated check valve according to claim 3, characterized in that: The base (3), the valve guide (2) and the valve seat (1) are provided with a sealing gasket (4).

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