CN205350459U - Ultrahigh pressure one -way valve - Google Patents

Abstract

The utility model discloses an ultra-high pressure one-way valve, which aims to provide a one-way valve part with high reliability, good sealing performance and high safety. The utility model is realized through the following technical scheme: the steel ball seat (2) with the end hole is threadedly connected to the tapered seat (5) through the stepped hole connected with the fluid channel of the valve body, and the inner stepped hole of the steel ball seat is built in The guide seat (3) encapsulates the steel ball (4) between the tapered surface of the guide seat and the space between the tapered surface of the tapered seat (5), and the steel ball (4) fits the tapered seat through the tapered surface of the guide seat The tapered surface of the valve body (1) is fitted with the tapered surface to form a line seal that prevents the oil from flowing back into the oil inlet channel. The inlet joint (6) passes through the sunken step hole of the inlet flange (7) below the inlet end face of the valve body (1) and protrudes axially. The end face below the inlet flange. The utility model solves the problems that the ordinary ball valve type one-way valve has no guide, reliability, maintainability, safety, sealing performance, poor flow rate and the like.

Description

Ultra High Pressure Check Valve

technical field

The utility model relates to an ultra-high pressure oil-water one-way valve whose working pressure can reach 2MPa-200MPa.

Background technique

In the prior art, most of the ultra-high pressure check valves use springs, steel balls or cones to form a structure to prevent the reverse flow of the medium. The ultra-high pressure check valve, also known as the ultra-high pressure check valve, is a high-hardness spherical valve core made of stainless steel, matched with a high-hardness stainless steel valve seat, and adopts line contact sealing. The ultra-high pressure check valve is normally closed. Due to the pressure of the medium at the inlet end of the pipeline, the valve is opened by overcoming the resistance of the spring. When the medium pressure at the inlet end is lower than that at the outlet end, the spring pushes the spool to the spool to close the valve, preventing the medium from flowing backward and acting as a check. The shortcomings of this ultra-high pressure one-way valve body with an integrated structure composed of springs, steel balls or cones are: difficult processing, high manufacturing costs, difficult maintenance, and pressure medium entering from the inlet, it is necessary to overcome the resistance of the spring to make the inlet and outlet In the process of use, the failure or damage of the spring will cause system failure. Some non-return valve structures that require a large flow rate also adopt a springless structure, but lack a guide seat, and lack a conical seat to connect with a steel ball seat.

Contents of the invention

The purpose of the present invention is to provide an ultra-high pressure one-way valve element with simple assembly relationship, high reliability, good sealing performance and high safety, which can realize one-way flow of ultra-high pressure oil and liquid in view of the shortcomings of the existing technology .

The technical solution adopted by the present invention to solve the technical problem is: an ultra-high pressure check valve, which includes a steel ball and a steel ball seat connected to a conical seat arranged in the fluid passage of the valve body hole, and is characterized in that: The steel ball seat 2 of the hole is threaded to the tapered seat 5 through the stepped hole connected to the fluid channel of the valve body, and the guide seat 3 built in the stepped hole inside the steel ball seat 2 encapsulates the steel ball 4 on the tapered surface of the guide seat 3 and the cone Between the conical surface space of the shaped seat 5, the steel ball 4 fits with the conical surface of the conical seat 5 through the conical surface of the guide seat 3 to form a line seal that prevents the oil from flowing back into the oil inlet channel. The joint 6 passes through the sunken stepped hole of the inlet flange 7 below the inlet end surface of the valve body 1, and axially protrudes from the lower end surface of the inlet flange 7.

Compared with the prior art, the utility model has the following beneficial effects.

Independent structure, no high-precision machining, easy to install, safe and reliable to use. The utility model adopts the connection between the inlet and outlet flange and the valve body through screws, the inlet joint is clamped on the step hole of the inlet flange, and the one-way valve body is independently designed. The valve body can be directly connected with the ultra-high pressure supercharger, which is convenient for disassembly and installation. , which solves the problems of difficult processing, high manufacturing cost and difficult maintenance of the integrated structure valve body in the prior art. It is easy to use and maintain, and does not affect the overall system usage.

The assembly relationship is simple, the reliability is high, the sealing performance is good, and the safety is high. The guide seat 3 built in the step hole inside the steel ball seat 2 of the utility model encapsulates the steel ball 4 between the tapered surface of the guide seat 3 and the space of the tapered surface of the tapered seat 5, and the steel ball 4 passes through the cone of the guide seat 3. The shape surface fits with the tapered surface of the tapered seat 5 to form a line seal that prevents the oil from flowing back into the oil inlet channel. It has the characteristics of high reliability, good sealing performance, convenient maintenance, high safety, and independent use .

The present invention uses steel balls to press against the conical surface of the conical seat to achieve a one-way sealing effect. This one-way valve is installed on the inlet and outlet valve body of the ultra-high pressure supercharger, which solves the problems of ordinary ball valve-type one-way valve without guidance, reliability, maintainability, safety, sealing, and poor flow rate.

The utility model adopts the steel ball and the guide seat to be placed in the inner space of the conical seat and the steel ball seat together. The one-way valve fitted with the tapered surface of the guide seat is simple in assembly, convenient in disassembly and good in maintainability.

The utility model adopts the guide seat to press on the steel ball, and the steel ball is pressed on the conical seat to make it have a guiding function.

Description of drawings

Fig. 1 is a schematic diagram of a full sectional structure of an ultra-high pressure check valve of the present invention.

In the figure: 1 valve body, 2 steel ball seat, 3 guide seat, 4 steel ball, 5 tapered seat, 6 inlet joint, 7 inlet flange, 8 combination gasket.

detailed description

In the embodiment of the ultra-high pressure check valve shown in Figure 1, the ultra-high pressure check valve includes a steel ball and a steel ball seat that are arranged in the fluid passage of the valve body hole and are connected with the conical seat, and the conical seat 5 and the steel ball seat 2 thread connection, one end is stuck on the step hole of the fluid channel of the valve body 1, and the other end is stuck on the end face of the inlet joint 6, the inlet flange 7 is connected with the valve body 1 by screws, and the inlet joint 6 is stuck on the inlet flange 7 on the step hole. The conical seat 5 and the steel ball seat 2 are connected by internal and external threads, the inlet flange 7 is connected with the valve body 1 by screws, and the inlet joint 6, the conical seat and the steel ball seat are stuck in the step hole of the inlet flange 7 and the valve body 1 On the stepped hole of the fluid channel. The steel ball 4 and the guide seat 3 are placed together in the inner space of the conical seat 5 and the steel ball seat 2. Shape fit. The conical surface of the conical seat 5 is a linear seal, and the steel ball 4 and the conical surface of the conical seat 5 are sealed to prevent the oil liquid from flowing back into the oil inlet channel.

The combined gasket 8 is stuck between the conical seat 5 and the valve body 1 to seal the high-pressure liquid in the valve body. When the oil enters the channel through the oil inlet A, the pressure of the oil pushes away the steel ball 4 and the guide seat 3 to conduct, and the high-pressure liquid flows out from the oil outlet B through the circumferential circulation channel of the steel ball seat 2.

When no oil enters the oil inlet, when the oil pressure thrust is less than the total gravity of the check valve steel ball 4 and the guide seat 3, the gravity pressure exerted by the guide seat 3 on the steel ball 4 plus the force of the steel ball 4 itself Gravity, press the steel ball 4 on the conical surface of the conical seat 5, the steel ball 4 and the conical surface of the conical seat 5 form a line seal, close the valve to prevent the medium from flowing backward, and prevent the oil from flowing back into the oil inlet channel .

Claims (8)

1. An ultra-high pressure one-way valve, including a steel ball and a steel ball seat connected to a conical seat arranged in the fluid channel of the valve body hole, characterized in that: the steel ball seat (2) with an end hole passes through the valve body The stepped hole connected to the fluid channel is threadedly connected to the tapered seat (5), and the guide seat (3) built in the inner stepped hole of the steel ball seat (2) encapsulates the steel ball (4) on the tapered surface of the guide seat (3) and Between the tapered surface space of the tapered seat (5), the steel ball (4) fits with the tapered surface of the tapered seat (5) through the tapered surface of the guide seat (3), forming a block to prevent the oil from flowing back. For the line seal of the oil inlet channel, the inlet joint (6) passes through the sunken step hole of the inlet flange (7) below the inlet end surface of the valve body (1), and axially protrudes from the lower end surface of the inlet flange (7). 2. The ultra-high pressure check valve according to claim 1, characterized in that the conical seat (5) is threadedly connected to the steel ball seat (2), and one end is stuck on the stepped hole of the fluid channel of the valve body (1), One end is stuck on the end face of the inlet joint (6). 3. The ultra-high pressure check valve according to claim 1, characterized in that the inlet flange (7) is connected to the valve body (1) by screws, and the inlet joint (6) is stuck on the step of the inlet flange (7) On the hole, the steel ball (4) and the guide seat (3) are placed in the inner space of the conical seat (5) and the steel ball seat (2), and the conical shape of the steel ball (4) and the conical seat (5) The surface fit forms a line seal and also fits the tapered surface of the guide seat (3). 4. The ultra-high pressure check valve according to claim 1, characterized in that the conical seat (5) is stuck on the end surface of the inlet joint (6) through one end of the combined gasket (8). 5. The ultra-high pressure check valve according to claim 4, characterized in that the combined gasket (8) is stuck between the conical seat (5) and the valve body (1) to seal the high-pressure liquid in the valve body. 6. The ultra-high pressure check valve according to claim 1, characterized in that the conical surface of the conical seat (5) is a line-sealed conical surface, and the conical surface of the steel ball (4) and the conical seat (5) The upper thread seal prevents oil from flowing back into the inlet port passage. 7. The ultra-high pressure check valve according to claim 1, characterized in that, when the oil enters the passage through the oil inlet A, the pressure of the oil pushes the steel ball (4) and the guide seat (3) into conduction, The high-pressure liquid flows out from the oil outlet B through the circumferential circulation channel of the steel ball seat (2). 8. The ultra-high pressure check valve according to claim 1, characterized in that, when no oil enters the oil inlet, the thrust force of the oil pressure is less than that of the check valve steel ball (4) and the guide seat (3) When the total gravity of the steel ball (4) is added to the gravity pressure exerted by the guide seat (3) on the steel ball (4) itself, the steel ball (4) is pressed on the conical surface of the conical seat (5) , the steel ball (4) forms a line seal with the conical surface of the conical seat (5), closes the valve to prevent the reverse flow of the medium, and prevents the oil from flowing back into the oil inlet channel.