Steel ball positioning type cylindrical slide valve structure

Abstract

The present application belongs to the field of mechanical and hydraulic engineering, and discloses a steel ball positioning type cylindrical slide valve structure, which comprises a valve core and a valve sleeve, the valve core is arranged in the valve sleeve in an axially movable manner, wherein the left and right ends of the valve core are fixedly connected with pressure liners, the left and right ends of the valve sleeve are fixedly connected with stop blocks, the stop blocks have inwardly tapered edges to limit the outwardly tapered pressure liners, so that the valve core has a left limit position and a right limit position in the valve sleeve; wherein the left and right ends of the valve core and the valve sleeve are further provided with steel ball self-locking devices, the steel ball self-locking devices enable the valve core to be self-locked at the left limit position and the right limit position of the valve sleeve. The present application realizes the positioning and locking of the valve core after power failure and pressure failure, improves the safety and reliability of the product, can realize the switching of the left and right positions under the action of high-pressure oil, has high switching efficiency, the switched position can be self-locked, and the valve core can remain at the position before power failure and pressure failure.

Description

Technical Field

[0001] This invention belongs to the field of mechanical and hydraulic engineering, and relates to a cylindrical slide valve, specifically a steel ball positioning cylindrical slide valve structure. Background Technology

[0002] Traditional cylindrical spool valves have no positioning function and generally rely on a return spring to reset after pressure and power failure. After the product is depressurized and de-energized, it will reset under the action of the return spring and cannot maintain its original position, which affects the safety and reliability of the product.

[0003] Traditional slide valve structure, such as Figure 16 As shown, when the spool valve control end is under low pressure, the spring compresses the support, pressing the valve core, and the valve core is in the open position. When the spool valve control end is under high pressure, the high-pressure oil pushes the valve core against the spring force, and the valve core position changes. Traditional structures lack a locking function; after the product is depressurized or powered off, the valve core returns to its right-hand position under the spring force, failing to maintain its position. When the control chamber is under high pressure, the high-pressure chamber must be maintained at a continuous high pressure to maintain the valve core position. Summary of the Invention

[0004] The purpose of this invention is to provide a steel ball positioning cylindrical slide valve structure, which can realize the positioning and locking of the cylindrical slide valve and achieve the holding function after power failure and pressure failure.

[0005] The technical solution of this invention:

[0006] A ball-positioned cylindrical slide valve structure includes a valve core and a valve sleeve. The valve core is axially movable within the valve sleeve. Pressure bushings are fixedly connected to both ends of the valve core, and stops are fixedly connected to both ends of the valve sleeve. The stops have inwardly concave convex edges that limit the pressure bushings with outwardly convex edges, allowing the valve core to have left and right extreme positions within the valve sleeve. Furthermore, a ball self-locking device is provided at both ends of the valve core and valve sleeve, enabling the valve core to self-lock at the left and right extreme positions of the valve sleeve.

[0007] Furthermore, the left and right ends of the valve core and valve sleeve are symmetrical.

[0008] Furthermore, the steel ball self-locking device includes a pressure cone, a steel ball, a spring seat, and a spring; the valve core's two ends are narrowed to form small cylinders, and the spring is sleeved on the small cylinders. The other end of the spring is a spring seat that can move axially within the valve core. The steel ball is placed on the non-spring end of the spring seat. The pressure cone, fixedly sleeved on the small cylinder of the valve core, limits the steel ball between the spring seat and the pressure cone. The contact surface between the pressure cone and the steel ball is an inclined surface, with the direction of the inclined surface from the upper outer side to the lower inner side. The inner sides of both ends of the valve sleeve are also provided with conical structures, and both sides of the conical structures are provided with inclined surfaces. The steel ball is located in the space formed by the inclined surface of the pressure cone, the inner wall surface of the valve sleeve, and the end face of the spring seat. The height of the conical structure will not interfere with the stop block and the pressure cone, but it will interfere with the steel ball.

[0009] Furthermore, the inclined surface of the conical structure, in conjunction with the inclined surface of the pressure cone, causes the steel ball to move downwards on the inclined surface of the pressure cone when the valve core enters the left and right extreme positions, thus compressing the spring. When the valve core leaves the left and right extreme positions, the steel ball is squeezed between the two inclined surfaces of the pressure cone and the conical structure, requiring a large thrust to move the steel ball diagonally downwards and compress the spring.

[0010] Furthermore, the contact end between the spring seat and the steel ball is a circular ring, and a gap is left between the outer ring of the circular ring and the valve sleeve to avoid the conical surface structure.

[0011] Furthermore, it also includes a bushing, which is fitted over the small cylinder of the valve core to limit excessive movement of the spring seat toward the steel ball.

[0012] Furthermore, there are at least eight steel balls, with at least four steel balls located on the left and right sides of the valve core and valve sleeve, respectively.

[0013] Furthermore, both the spring seat and the pressure liner are provided with oil grooves. High-pressure hydraulic oil on the left or right side passes through the oil grooves of the pressure liner and the spring seat, acts on the valve core, pulls the pressure liner and the pressure cone to move axially, and drives the steel ball to move axially.

[0014] The beneficial effects of this invention are:

[0015] 1. This invention enables the valve core to be positioned and locked after power and pressure are cut off, thereby improving the safety and reliability of the product.

[0016] 2. This invention can switch between left and right positions under the force of high-pressure oil, with high switching efficiency. The switched position can be self-locked, and the valve core can remain in the position before the power and pressure are cut off, which meets the product's usage requirements. Compared with the original spring-reset slide valve device, this device has stronger functionality and higher safety and reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This invention relates to a ball-positioning cylindrical slide valve structure;

[0019] Figure 2 This is a schematic diagram of the main view structure of the blocking ring of the present invention;

[0020] Figure 3 This is a schematic diagram of the blocking ring structure in section A of the present invention;

[0021] Figure 4 This is a schematic diagram of the main view structure of the stop block of the present invention;

[0022] Figure 5 This is a schematic diagram of the sectional view of the block A in this invention.

[0023] Figure 6 This is a schematic diagram of the main view structure of the pressure liner of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the liner in direction A of the present invention.

[0025] Figure 8 This is a schematic diagram of the main view structure of the pressure cone of the present invention.

[0026] Figure 9 This is a schematic diagram of the pressure cone structure from direction A of the present invention.

[0027] Figure 10 This is a schematic diagram of the bushing structure in the main view and A-direction view of the present invention.

[0028] Figure 11 This is a schematic diagram of the main structure of the spring seat of the present invention.

[0029] Figure 12 Spring seat A-direction view structural schematic diagram

[0030] Figure 13 This is a schematic diagram of the spring seat structure from direction B of the present invention.

[0031] Figure 14 This is a schematic diagram of the valve core structure of the present invention;

[0032] Figure 15 This is a schematic diagram of the valve sleeve structure of the present invention;

[0033] Figure 16 This is a schematic diagram of a traditional slide valve structure in the background technology;

[0034] Among them, 1—blocking ring, 2—stop block, 3—pressure liner, 4—pressure cone, 5—steel ball, 6—bulb, 7—spring seat, 8—valve core, 9—valve sleeve, 10—spring. Detailed Implementation

[0035] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are given in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; they can refer to mechanical connections or point connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Example 1:

[0039] A ball-positioned cylindrical slide valve structure includes a valve core 8 and a valve sleeve 9. The valve core 8 is axially movable within the valve sleeve 9. Pressure bushings 3 are fixedly connected to both ends of the valve core 8, and stop blocks 2 are fixedly connected to both ends of the valve sleeve 9. The stop blocks 2 have inwardly concave convex edges that limit the pressure bushings 3, which have outwardly convex edges, so that the valve core 8 has a left limit position and a right limit position within the valve sleeve 9. A ball self-locking device is also provided at both ends of the valve core 8 and the valve sleeve 9, which enables the valve core 8 to self-lock at the left limit position and the right limit position of the valve sleeve 9.

[0040] The left and right ends of the valve core 8 and valve sleeve 9 are symmetrical.

[0041] The steel ball self-locking device includes a pressure cone 4, a steel ball 5, a spring seat 7, and a spring 10. The valve core 8 has its diameter reduced at both ends to form small cylinders. The spring 10 is sleeved on the small cylinders. The other end of the spring 10 is the spring seat 7, which can move axially in the valve core 8. The steel ball 5 is placed at the non-spring end of the spring seat 7. The pressure cone 4, which is fixedly sleeved on the small cylinder of the valve core 8, limits the steel ball 5 between the spring seat 7 and the pressure cone 4. The contact surface between the pressure cone 4 and the steel ball 5 is an inclined surface, and the direction of the inclined surface is from the upper outside to the lower inside. The valve sleeve 9 also has a conical structure on the inner side of both ends. Both sides of the conical structure have inclined surfaces. The steel ball 5 is located in the space formed by the inclined surface of the pressure cone 4, the inner wall surface of the valve sleeve 9, and the end face of the spring seat 7. The height of the conical structure will not interfere with the stop block 2 and the pressure cone 4, but it will interfere with the steel ball 5.

[0042] The inclined surface of the conical structure cooperates with the inclined surface of the pressure cone 4. When the valve core 8 enters the left and right limit positions, the conical structure squeezes the steel ball 8 to move downwards on the inclined surface of the pressure cone 4, squeezing the spring 10. When the valve core 8 leaves the left and right limit positions, the steel ball 5 is squeezed between the two inclined surfaces of the pressure cone 4 and the conical structure. A large thrust is required to make the steel ball 5 move downwards at an angle to squeeze the spring 10.

[0043] The contact end between the spring seat 7 and the steel ball 5 is a circular edge, and a gap is left between the outer ring of the circular edge and the valve sleeve 9 to avoid the conical surface structure.

[0044] It also includes a bushing 6, which is fitted over the small cylinder of the valve core 8 to limit excessive movement of the spring seat 7 toward the steel ball 5.

[0045] There are at least 8 steel balls 5, with at least 4 steel balls respectively located on the left and right sides of the valve core 8 and valve sleeve 9.

[0046] Both the spring seat 7 and the pressure liner 3 are provided with oil passage grooves. High-pressure hydraulic oil on the left or right side passes through the oil grooves of the pressure liner and the spring seat, acts on the valve core 8, pulls the pressure liner 3 and the pressure cone 4 to move axially, and drives the steel ball to move axially.

[0047] Example 2:

[0048] A ball-positioned cylindrical slide valve structure includes a valve core 8 installed inside a valve sleeve 9 and subjected to grinding treatment; a pressure liner 3 is threaded onto both ends of the valve core to limit the pressure cone 4; a blocking ring 1 is installed in a hole to limit and fix the valve sleeve 9; a stop block 2 is installed in the inner hole of the blocking ring 1 to limit the pressure liner 3; and steel balls 5 are evenly distributed in a ring inside the hole of a spring seat 7, moving axially with the steel ball seat and pressing against the conical surface of the pressure cone 4.

[0049] The aforementioned spring seat 7 is provided with oil grooves, which are semi-circular in structure and number 8 evenly distributed.

[0050] The pressure liner 3 is equipped with an oil groove. High-pressure hydraulic oil on one side passes through the oil groove of the pressure liner and the spring seat, acts on the valve core, pulls the pressure liner 3 and the pressure cone 4 to move axially, and drives the steel ball to move axially.

[0051] One end of the blocking ring 1 has a conical structure that limits and locks the steel ball 5. When the steel ball 5 moves axially, the conical structure compresses the steel ball, causing it to move radially. The steel ball presses against the spring seat 7, causing it to move inwards towards the valve core. The spring 10 is compressed and contracts, and the steel ball continues to move radially inwards. Unlocking is achieved through the conical structure of the blocking ring.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A ball-positioned cylindrical slide valve structure, characterized in that, The valve includes a valve core (8) and a valve sleeve (9). The valve core (8) is axially movable inside the valve sleeve (9). Pressure bushings (3) are fixedly connected to the left and right ends of the valve core (8). Stop blocks (2) are fixedly connected to the two ends of the valve sleeve (9). The stop blocks (2) have inwardly concave convex edges that limit the pressure bushings (3) which have outwardly convex edges, so that the valve core (8) has a left limit position and a right limit position inside the valve sleeve (9). The valve core (8) and the valve sleeve (9) are also provided with steel ball self-locking devices at the left and right ends. The steel ball self-locking devices make the valve core (8) self-lock when it is in the left limit position and the right limit position of the valve sleeve (9). The left and right ends of the valve core (8) and valve sleeve (9) are symmetrical; The steel ball self-locking device includes a pressure cone (4), a steel ball (5), a spring seat (7), and a spring (10); the valve core (8) has its diameter reduced at both ends to form a small cylinder, and the spring (10) is sleeved on the small cylinder. The other end of the spring (10) is a spring seat (7) that can move axially on the valve core (8). The steel ball (5) is placed on the non-spring end of the spring seat (7). The pressure cone (4), which is fixedly sleeved on the small cylinder of the valve core (8), limits the steel ball (5) between the spring seat (7) and the pressure cone (4). The contact surface between the pressure cone (4) and the steel ball (5) is an inclined surface, and the direction of the inclined surface is from the outside to the inside. The valve sleeve (9) is also provided with a conical structure on the inner side of both ends, and the conical structure is provided with inclined surfaces on both sides. The steel ball (5) is located in the space formed by the inclined surface of the pressure cone (4), the inner wall of the valve sleeve (9), and the end face of the spring seat (7). The height of the conical structure will not interfere with the stop block (2) and the pressure cone (4), but it will interfere with the steel ball (5). The spring seat (7) and the pressure liner (3) are both provided with oil grooves. The high-pressure hydraulic oil on the left or right side passes through the oil grooves of the pressure liner and the spring seat and acts on the valve core (8), pulling the pressure liner (3) and the pressure cone (4) to move axially, and driving the steel ball to move axially.

2. The ball-positioning cylindrical slide valve structure according to claim 1, characterized in that, The inclined surface of the conical structure cooperates with the inclined surface of the pressure cone (4). When the valve core (8) enters the left and right limit positions, the conical structure squeezes the steel ball (5) to move downwards on the inclined surface of the pressure cone (4) and squeezes the spring (10). When the valve core (8) leaves the left and right limit positions, the steel ball (5) is squeezed between the two inclined surfaces of the pressure cone (4) and the conical structure. A large thrust is required to make the steel ball (5) move downwards and squeeze the spring (10).

3. The ball-positioning cylindrical slide valve structure according to claim 1, characterized in that, The contact end between the spring seat (7) and the steel ball (5) is a circular edge, and a gap is left between the outer ring of the circular edge and the valve sleeve (9) to avoid the conical surface structure.

4. The ball-positioning cylindrical slide valve structure according to claim 1, characterized in that, It also includes a bushing (6), which is fitted over the small cylinder of the valve core (8) to limit the excessive movement of the spring seat (7) toward the steel ball (5).

5. The ball-positioning cylindrical slide valve structure according to claim 1, characterized in that, There are at least 8 steel balls (5), with at least 4 steel balls respectively located on the left and right sides of the valve core (8) and valve sleeve (9).

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