A vacuum throttling and buffering structure for a valve

Abstract

A vacuum throttling and buffering structure for a valve, comprising a valve core, a valve body and a valve cover. After the valve core, valve body and valve cover are sealed and assembled, a vacuum chamber, a hydraulic chamber and an oil storage chamber are formed in sequence. The vacuum chamber is communicated with a valve arranged outside the valve body through a vacuum pipeline on the valve body to control the vacuum degree of the vacuum chamber. The hydraulic chamber is communicated with the oil storage chamber through an orifice. The present invention uses the dual functions of a structure capable of forming a vacuum and liquid throttling to decelerate high-speed moving parts, and can relatively easily realize the buffering and deceleration of high-speed moving parts inside the valve.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical valve manufacturing, and particularly relates to a vacuum throttling and buffering structure that can be used on mechanical equipment such as valves. Background Art

[0002] In the production and manufacturing of valves in the field of mechanical manufacturing, general valves have no requirements for the switching time, and are mostly driven manually or by low-speed drivers, such as low-speed pneumatic drivers, low-speed hydraulic drivers, electric ones, etc. The operating speed is slow, and there is no need to set a buffering structure. However, for valves with high-speed moving closing parts, it is of great significance to prevent the high-speed moving parts from moving to a stationary state without damaging the valve structure. According to Newton's laws of motion in physics, an object moving at high speed has a large amount of inertial energy, which is sufficient to cause great damage to other related structures. The generation of inertia is highly related to the mass and speed of the moving parts. Only by starting from these two points can the problem be solved. The present invention solves this problem by starting from the speed at which energy is generated. Summary of the Invention

[0003] The present invention provides a vacuum throttling and buffering structure for valves, which solves the buffering problem that the moving parts of the valve generate a large amount of inertia during high-speed movement without damaging the structure.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A vacuum throttling and buffering structure for valves, including a valve core, a valve body, and a valve cover. After the valve core, valve body, and valve cover are sealed and assembled, a vacuum chamber, a hydraulic chamber, and an oil storage chamber are formed in sequence; the vacuum chamber is connected to a valve provided outside the valve body through a vacuum pipeline on the valve body to control the vacuum degree of the vacuum chamber; the hydraulic chamber is connected to the oil storage chamber through an orifice.

[0006] The outer cylindrical surface of the valve core is a stepped structure. The outer periphery of the rear step contacts and moves with the inner cavity of the valve body. The outer periphery of the middle cylinder is sealingly connected to the boss of the inner cavity of the valve body, and the step surface at the front end is adapted and integrated with the support ring and then sealingly forms the vacuum chamber and the hydraulic chamber with the inner cavity of the valve body (10).

[0007] The valve cover is an I-shaped structure. One side shoulder end face of the I-shaped structure is sealingly connected to the end face of the valve body to close the valve body; the outer periphery of the other side shoulder is sealingly connected to the inner cavity of the valve body to form an oil storage chamber.

[0008] The present invention solves the problem of how the closing part of a high-speed moving valve can stop smoothly without damaging the related structure, thus achieving the result that the high-speed moving parts do not damage the related structure. It has the advantages of simple structure, practicality, and simple installation.

[0009] The working principle of the present invention is that when the valve core 1 moves, a vacuum chamber 1-1 is formed in the closed space, which can decelerate the valve core during movement. By adjusting the opening degree of the valve 3, the vacuum degree of the vacuum chamber 1-1 can be adjusted, thereby adjusting the movement speed of the valve core. The hydraulic chamber 2-2 formed by the valve core 1, the support ring 4, the valve body 10, and the valve cover 9 is filled with liquid, further decelerating the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present invention;

[0011] Figure 2 is an enlarged schematic diagram of each chamber of the present invention;

[0012] Where: 1-valve core, 2-first sealing ring, 3-valve, 4-support ring, 5-third sealing ring, 6-screw, 7-second sealing ring, 8-fourth sealing ring, 9-valve cover, 10-valve body, 11-1 first sealing ring groove, 11-2 second sealing ring groove, 11-3 third sealing ring groove, 11-4 fourth sealing ring groove, 12-overflow small hole, 13-vacuum adjustment channel, 1-1-vacuum chamber, 2-2-hydraulic chamber, 3-3-oil storage chamber. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Refer to Figure 1 、 2 , a vacuum throttling and buffering structure for a valve, including a valve core, a valve body, and a valve cover. After the valve core 1, the valve body 10, and the valve cover 9 are hermetically assembled, a vacuum chamber 1-1, a hydraulic chamber 2-2, and an oil storage chamber 3-3 are formed in sequence; the vacuum chamber 1-1 is communicated with a valve 3 disposed outside the valve body 10 through a vacuum pipeline 13 on the valve body 10 for controlling the vacuum degree of the vacuum chamber 1-1; the hydraulic chamber 2-2 is communicated with the oil storage chamber 3-3 through an overflow small hole 12.

[0015] The outer cylindrical surface of the valve core 1 is a stepped structure. The outer circumference of the rear step contacts and moves with the inner cavity of the valve body 10. The cylindrical outer circumference of the middle part is hermetically connected to the boss of the inner cavity of the valve body 10, and the step surface at the front end is adapted to the support ring 4 and connected into one body through a screw 6 and then hermetically forms the vacuum chamber 1-1 and the hydraulic chamber 2-2 with the inner cavity of the valve body 10. A first sealing ring groove 11-1 is provided on the boss of the inner cavity of the valve body 10 for installing the first sealing ring 2; the structure of the support ring 4 is adapted to the step surface at the upper end of the valve core. The inner step is connected to the valve core into one body through a screw 6. A third sealing ring groove 11-3 is provided on the side surface of the middle step, and the third sealing ring 5 is installed therein; a second sealing ring groove 11-2 is provided on the outer circumferential surface of the support ring 4, and the second sealing ring 7 is installed therein to seal the support ring 4 and the inner cavity of the valve body, thereby forming the vacuum chamber 1-1 on the left and the hydraulic chamber 2-2 on the right.

[0016] The valve cover 9 has an I-shaped structure. One side shoulder end face of the I-shape is hermetically connected to the end face of the valve body 10 to close the valve body 10; the outer periphery of the other side shoulder is hermetically connected to the inner cavity of the valve body 10 to form an oil storage cavity 3-3, and an overflow small hole 12 is provided on the shoulder for communicating with the hydraulic cavity 2-2. A fourth sealing ring groove 11-4 is provided on the inner side shoulder of the valve cover 9, and a fourth sealing ring 8 is installed therein, which is hermetically connected to the head of the valve core to form a hydraulic cavity 2-2 on the left side and an oil storage cavity 3-3 on the right side.

[0017] When the valve core 1 and the support ring 4 move together in the present invention, a vacuum cavity 1-1 will be formed. The vacuum degree of the vacuum cavity 1-1 is adjusted by controlling the gas entering the vacuum adjustment channel 13 through the regulating valve 3, that is, the movement speed of the valve core is adjusted by changing the volumes of the vacuum cavity 1-1 and the hydraulic cavity 2-2. The hydraulic cavity 2-2 is filled with liquid. When the valve core 1 and the support ring 4 move, the liquid is pressed to enter the oil storage cavity 3-3 through the overflow small hole 12 of the valve cover 9 to further decelerate the valve core.

Claims

1. A vacuum throttling and buffering structure for a valve, comprising a valve core, a valve body and a valve cover, characterized in that: After the spool (1), valve body (10) and valve cover (9) are sealed and assembled, a vacuum chamber (1-1), a hydraulic chamber (2-2) and an oil storage chamber (3-3) are formed in sequence; the vacuum chamber (1-1) is communicated with a valve (3) arranged outside the valve body (10) through a vacuum pipeline (13) on the valve body (10) to control the vacuum degree of the vacuum chamber (1-1); the hydraulic chamber (2-2) is communicated with the oil storage chamber (3-3) through an orifice (12); the outer cylindrical surface of the spool (1) is a stepped structure, the outer periphery of the step at the rear end contacts and moves with the inner cavity of the valve body (10), the outer periphery of the middle cylinder is sealingly connected with the boss in the inner cavity of the valve body (10), and the stepped surface at the front end is adapted to and integrally connected with the support ring (4) and then sealingly forms the vacuum chamber (1-1) and the hydraulic chamber (2-2) with the inner cavity of the valve body (10).

2. The vacuum throttling and buffering structure for a valve according to claim 1, characterized in that: The valve cover (9) is an I-shaped structure, one side shoulder end face of the I-shaped structure is sealingly connected with the end face of the valve body (10) to close the valve body (10); the outer periphery of the other side shoulder is sealingly connected with the inner cavity of the valve body (10) to form the oil storage chamber (3-3).

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