A vacuum lifting control valve

Abstract

The present invention relates to a control valve, in particular to a vacuum lifting control valve, which solves the problems of rebound and instability of the vacuum control valve. It includes a valve body. The upper part of the valve body is an upper interface connected to a vacuum telescopic tube, and the lower part of the valve body is a lower interface connected to a suction cup. A through valve cavity is provided between the upper interface and the lower interface of the valve body. The valve cavity is arranged along the axial direction of the valve body. A rotary handle is provided on one side surface of the valve body in the radial direction, and a rotary throttle piece is provided on the other side wall of the valve body opposite to the rotary handle. A linkage shaft is connected between the rotary throttle piece and the rotary handle, breaking through the constraints of the traditional easy rebound and unclear operation target. By using the linkage shaft to drive the "mechanical flap" and combining with the angle control of the "rotary throttle piece", under relatively simple and stable mechanical principles and angle control conditions, the operation target is clear and there is a good stability effect.

Description

Technical Field

[0001] The invention relates to a control valve, in particular to a vacuum hoist control valve. Background Art

[0002] At the current stage of industrial development, some goods in certain weight ranges need to be handled by operators with mechanical assistance. The main handling and lifting auxiliary equipment on the market are: electric lifting, lever balance assisted lifting, cylinder assisted lifting, vacuum tube assisted lifting, etc. The patent of this invention is the main mechanism in the vacuum tube assisted lifting equipment - vacuum crane control valve. In the current industrial market, most of the vacuum crane control valves of about 100 kilograms cannot operate synchronously with the suction cup unloading valve and the lifting and lowering valve. Although it is convenient for handling, the telescopic vacuum tube is prone to repeated rebound during operation, and the adjustment of the lifting force and the unclear state of unloading goods have greatly affected the market acceptance and application rate, and also made many customers who use it very helpless. Summary of the invention

[0003] In view of the deficiencies in the existing technology, the present invention provides a vacuum hoist control valve.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a vacuum hanging control valve, including a valve body, the upper part of the valve body is an upper interface connected to the vacuum telescopic tube, the lower part of the valve body is a lower interface connected to the suction cup, the valve body is provided with a through valve cavity between the upper interface and the lower interface, the valve cavity is arranged along the axial direction of the valve body, the valve body is provided with a rotating handle on one radial side surface, and the valve body is provided with a rotating cut-off piece on the side wall on the other side relative to the rotating handle, a linkage shaft is connected between the rotating cut-off piece and the rotating handle, the linkage shaft is in the valve cavity, and a mechanism for opening and closing the valve cavity is provided on the linkage shaft. A mechanical flap, a nylon seal is further provided between the valve body and the rotating cut-off piece, the nylon seal is provided with an upper opening and a lower opening connected to the valve cavity, the rotating cut-off piece is provided with an adjustment hole and a pressure relief hole corresponding to the positions of the upper opening and the lower opening in sequence, the upper opening and the lower opening are respectively located on the opposite sides of the mechanical flap, and the upper opening is located on the upper side of the mechanical flap, the rotating cut-off piece connects the adjustment hole with the upper opening, and the pressure relief hole with the lower opening through rotation, the rotating cut-off piece has an unloaded state in which the adjustment hole and the upper opening are kept coincident, and the rotating cut-off piece also has a lifting state in which the adjustment hole and the upper opening are staggered and avoided.

[0005] One end of the linkage shaft passes through the rotating cut-off piece to form a threaded portion, and a nut is provided on the threaded portion to limit the separation of the rotating cut-off piece. One end of the linkage shaft passes through the rotating cut-off piece and the spring, and a square hole is provided between the linkage shaft and the rotating cut-off piece to limit rotation, that is, a nut is provided at the other end of the spring tail to limit separation.

[0006] The adjustment hole is extended and formed along an arc path.

[0007] The upper opening and the lower opening are symmetrically arranged on the nylon seal.

[0008] A nylon connecting piece is provided between the rotary handle and the valve body.

[0009] Beneficial effects of the present invention: The vacuum lifting control valve provided by the present invention breaks through the traditional constraints of easy resilience and unclear operation targets. By using a linkage shaft to drive the angle control of a "mechanical flap" combined with a "rotary throttle piece", under relatively simple and stable mechanical principles and angle control conditions, the operation target is clear and has a good stability effect. Description of the Drawings

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

[0011] Figure 2 It is a schematic combined structural diagram of the present invention;

[0012] Figure 3 It is a schematic exploded structural diagram of the present invention;

[0013] Figure 4 It is a schematic structural diagram of the nylon seal of the present invention;

[0014] Figure 5 It is a schematic structural diagram of the rotary throttle piece of the present invention. Detailed Embodiments

[0015] As Figures 1 - 5 shown, a vacuum lifting control valve includes a valve body 1. The upper part of the valve body 1 is an upper interface 2 connected to a vacuum telescopic tube 4, and the lower part of the valve body 1 is a lower interface 5 connected to a suction cup 3. The valve body 1 is provided with a through valve cavity 6 between the upper interface 2 and the lower interface 5. The valve cavity 6 is arranged along the axial direction of the valve body 1. The valve body 1 is provided with a rotary handle 7 on one side surface in the radial direction, and a rotary throttle piece 8 is provided on the other side wall of the valve body 1 opposite to the rotary handle 7. In an actual use scenario, it also includes an installation chassis, a column, a rocker rail, a vacuum telescopic tube 4, a suction cup 3, etc. A vacuum air source interface 18 is also provided above the vacuum telescopic tube 4, mainly for the installation of the valve body 1 and the access of vacuum negative pressure. This is a relatively mature technical means and will not be elaborated and restricted too much here.

[0016] A linkage shaft 9 is connected between the rotating cut-off piece 8 and the rotating handle 7. The linkage shaft 9 is in the valve cavity 6. A mechanical flap 10 for opening and closing the valve cavity 6 is arranged on the linkage shaft 9. The mechanical flap 10 is installed on the linkage shaft 9 and is in the center of the valve cavity 6. A nylon seal 11 is also arranged between the valve body 1 and the rotating cut-off piece 8. The linkage shaft is used to make the rotating handle 7, the mechanical flap 10 and the rotating cut-off piece 8 rotate synchronously, so as to achieve the effect of synchronous control of the opening and closing of the valve cavity 6 and the lifting force. It should be pointed out that the nylon seal 11 plays the role of sealing and connection on the one hand, and on the other hand, an upper opening 12 and a lower opening 13 are arranged on it to facilitate the connection or opening and closing of other gas circuits, that is, the lifting force gas circuit and the pressure relief gas circuit.

[0017] The nylon seal 11 is provided with an upper opening 12 and a lower opening 13 connected to the valve chamber 6, and the rotating cut-off piece 8 is provided with an adjustment hole 14 and a pressure relief hole 15 corresponding to the positions of the upper opening 12 and the lower opening 13 in sequence. The upper opening 12 and the lower opening 13 are respectively located on the opposite sides of the mechanical flap 10, and the upper opening 12 is located on the side close to the upper interface 2. The rotating cut-off piece 8 connects the adjustment hole 14 with the upper opening 12, and the pressure relief hole 15 with the lower opening 13 by rotation. The rotating cut-off piece 8 has an unloaded state in which the adjustment hole 14 is kept coincident with the upper opening 12, and the rotating cut-off piece 8 also has a lifting state in which the adjustment hole 14 and the upper opening 12 are misaligned and avoided. The upper opening 12 and the lower opening 13 respectively control the parts of the valve chamber 6 on both sides of the mechanical flap 10. Here, the two sides of the mechanical flap 10 can be regarded as independent chambers. Therefore, the upper opening 12 and the lower opening 13 can make the two places connected to the outside respectively, thereby generating lifting force regulation and pressure relief.

[0018] Specifically, in the standby state: The rotating handle 7 is in the uninstalled position, the mechanical flap 10 is in the state of closing the valve cavity 6, the pressure relief hole 15 is connected to the outside, so that the suction cup 3 at the lower interface 5 is depressurized and has no suction force. At the same time, the adjustment hole 14 is fully open. Affected by the vacuum expansion tube 4, the whole is in a suspended state, and the suspension height is determined by the aperture of the adjustment hole 14 (or a flow-limiting regulating valve is installed); In the goods-taking state: The operator moves the suction cup 3 above the item and rotates the forward handle 7. The linkage shaft 9 drives the mechanical flap 10 to open the valve cavity 6, the pressure relief hole 15 is completely closed, the adjustment hole 14 is fully open, and the negative pressure in the vacuum expansion tube 4 drops significantly and the height also drops until it reaches the adsorbed object. Since the adjustment hole 14 is fully open, the negative pressure in the vacuum expansion tube 4 is not enough to lift the heavy object; In the lifting state: Continue to rotate the operating handle forward. The pressure relief hole 15 is in the closed state, the flap 10 is in the open state, and the adjustment hole 14 starts to close (throttle). The tighter the closing angle of the adjustment hole 14, the higher the contraction height of the vacuum expansion tube 4. Then move the item to the designated position; In the unloading state: Rotate the operating handle in the reverse direction, that is, the mechanical flap 10 is in the valve cavity 6 state, the pressure relief hole 15 is still in the closed state, the adjustment hole 14 slowly opens, and the goods will fall with the opening angle of the adjustment hole 14 until the rotating handle 7 rotates to the designated angle and enters the standby state, causing the flap 10 to close and the pressure relief hole 15 to open, and then the suction cup starts to leave the goods. Generally speaking, the adjustment hole 14 is used to adjust the negative pressure of the 'vacuum expansion tube 4' above the valve body, the pressure relief hole 15 is used to relieve the pressure at the'suction cup 3' below the valve body, and the mechanical flap 10 is'synchronized to open or close'. The weight of the adsorbed item mainly depends on the diameter of the vacuum expansion tube 4 and the negative pressure suction force. At the same time, the vacuum expansion tube 4 will expand and contract or change its height due to the negative pressure situation.

[0019] One end of the linkage shaft 9 passes through the rotating throttle piece 8, passes through the spring 16, and the tail is connected to the nut 17. There is an inner square hole on the throttle piece 8, which rotates synchronously with the linkage shaft 9. The spring 16 presses the throttle piece 8, and the tail of the spring 16 is limited by the nut 17. The adjustment hole 14 extends and forms along an arc path. During the rotation process, the adjustment hole 14 can be in a coincident state with the upper opening 12 for a period of time, which is beneficial to the design and use. The upper opening 12 and the lower opening 13 are symmetrically arranged on the nylon seal 11. Matching the structural layout of this design, there is no need for an overly complex design to achieve the synchronization of pressure relief and lifting force adjustment, and no more elaboration and limitation are made here. There is a nylon connecting piece between the rotating handle 7 and the valve body 1. Similarly, it plays the role of connection and sealing.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation of the present invention. At the same time, the basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art of this industry should understand.

Claims

1. A vacuum lifting control valve, comprising a valve body, characterized in that, The upper part of the valve body is an upper interface connected to the vacuum telescopic tube, and the lower part of the valve body is a lower interface connected to the suction cup. The valve body is provided with a through valve cavity between the upper interface and the lower interface, and the valve cavity is arranged along the axial direction of the valve body. The valve body is provided with a rotating handle on one radial side, and the valve body is provided with a rotating cut-off piece on the side wall on the other side relative to the rotating handle. A linkage shaft is connected between the rotating cut-off piece and the rotating handle, and the linkage shaft is in the valve cavity. A mechanical flap for opening and closing the valve cavity is provided on the linkage shaft. There is also a A nylon seal, wherein the nylon seal is provided with an upper opening and a lower opening connected to the valve cavity, and the rotating cut-off piece is provided with an adjustment hole and a pressure relief hole corresponding to the positions of the upper opening and the lower opening in sequence, the upper opening and the lower opening are respectively located on the opposite sides of the mechanical flap, and the upper opening is located on the side close to the upper interface, and the rotating cut-off piece is connected by rotating to connect the adjustment hole with the upper opening, and the pressure relief hole with the lower opening, and the rotating cut-off piece has an unloaded state in which the adjustment hole and the upper opening are kept overlapped, and the rotating cut-off piece also has a lifting state in which the adjustment hole and the upper opening are misaligned and avoided.

2. The vacuum lifting control valve according to claim 1, wherein One end of the linkage shaft passes through the rotating cut-off piece to form a threaded portion, and a nut for limiting the separation of the rotating cut-off piece is provided on the threaded portion.

3. A vacuum lifting control valve according to claim 1 or 2, characterized in that, The adjustment hole is extended and formed along an arc path.

4. The vacuum lifting control valve according to claim 3, wherein, The upper opening and the lower opening are symmetrically arranged on the nylon sealing component.

5. A vacuum lifting control valve according to claim 1, characterized in that, A nylon connector is provided between the rotary handle and the valve body.

Images