A reverse opening plug-in stop valve and method

Abstract

The present invention belongs to the field of valve technology, and in particular to a reverse-opening plug-in stop valve and method, comprising a valve block and a valve core, the valve core comprising an opening and closing component and an actuator, wherein the opening and closing component comprises a valve sleeve, the valve sleeve is provided with a connected liquid inlet hole and a liquid outlet hole, a sealing component and an elastic component are provided inside the valve sleeve, under the action of the elastic component, the sealing component blocks the liquid inlet hole, the actuator comprises a valve stem and a positioning sleeve, when the valve core is manipulated to open, the valve stem is pushed inwardly so that a push pin at the front end of the valve stem pushes open the sealing component in the valve sleeve to open the liquid inlet hole, so that the liquid inlet hole is opened, therefore, compared with the traditional valve core, the reverse-opening plug-in stop valve opens the valve core by manipulating the valve stem to move inwardly, and closes the valve core by manipulating the valve stem to move outwardly, which is opposite to the traditional manipulation method, so that the torque applied to the valve stem when closing the valve core is smaller, and the operation is more labor-saving, so that a smaller diameter hand wheel can be used and the size of the valve can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a reverse opening plug-in stop valve and a method thereof. Background Art

[0002] The stop valve is a commonly used hydraulic component and is widely used in various hydraulic systems. The stop valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the opening and closing parts inside the valve to force the sealing surface to prevent leakage. For example, one opening and closing part of the stop valve is a cylindrical valve disc, which uses the torque of the valve stem to apply a downward pressure to the sealing surface so that the valve disc sealing surface fits tightly with the valve seat sealing surface, which can prevent the inflow of medium or be used to adjust the flow rate of the medium.

[0003] At present, in the pipelines of high-pressure hydraulic systems, due to the high fluid pressure in the pipelines, when the valve stem is turned, it is necessary to overcome the force exerted on the valve disc by the fluid pressure in order to move downward. Therefore, the diameter of the handwheel is generally larger to reduce the force of twisting the handwheel. However, on some equipment with high integration of hydraulic components and small operating space, a large-diameter handwheel cannot be used. At this time, it is very difficult to rotate the valve stem to close the stop valve. Summary of the invention

[0004] The present invention aims to provide a reverse-opening plug-in stop valve and method, so as to solve the technical problem in the prior art that, when the pressure in the hydraulic system is too high, a larger torsional force needs to be applied when the existing valve is closed, resulting in a valve handwheel having a large diameter, requiring a larger valve installation space, and being inconvenient to use in a hydraulic system with a high degree of integration of hydraulic components.

[0005] To solve the above technical problems, the first aspect of the present invention is:

[0006] Provided is a reverse opening plug-in stop valve, comprising:

[0007] A valve block, wherein the valve block is provided with a valve core installation cavity, and a liquid inlet channel and a liquid outlet channel communicated with the valve core installation cavity;

[0008] The valve core comprises an opening and closing component, the opening and closing component comprises a valve sleeve, the valve sleeve is provided with a liquid inlet hole and a liquid outlet hole which are connected to each other, a sealing component and an elastic component are provided inside the valve sleeve, and under the action of the elastic component, the sealing component blocks the liquid inlet hole; an actuator is provided beside the opening and closing component, the actuator comprises a valve stem and a positioning sleeve, the valve stem is arranged in the positioning sleeve, a liquid flow channel is provided between the valve sleeve and the positioning sleeve, so that the liquid can reach the liquid inlet hole through the liquid flow channel; the valve core also comprises a screw and a valve cover, the valve cover is provided with a screw hole corresponding to the screw, and the front end of the screw is connected to the rear end of the valve stem;

[0009] The valve core is installed in the valve core installation cavity of the valve block, the valve cover is connected to the valve block, and the liquid flow channel and the liquid outlet are respectively connected to the liquid inlet channel and the liquid outlet channel. When the valve stem moves forward along the positioning sleeve, the front end of the valve stem can push the sealing component to open the liquid inlet hole.

[0010] Preferably, a plurality of first support blocks are provided at intervals along the circumferential direction on the front end surface of the positioning sleeve, and a plurality of second support blocks are provided at intervals on the outer circumference of the rear end of the valve sleeve. The front end surface of the first support block is supported on the top surface of the second support block, so that the front end of the positioning sleeve and the rear end of the valve sleeve form the liquid flow channel.

[0011] Preferably, a T-shaped hole is provided at the rear end of the valve stem, and a T-shaped block is provided at the front end of the screw rod, and the T-shaped block is clamped in the T-shaped hole.

[0012] Preferably, the elastic component is a spring, a spring limiting seat is installed on the liquid outlet, the spring is located in the channel between the liquid inlet and the liquid outlet, and the bottom of the spring is supported on the spring limiting seat.

[0013] Preferably, a support sleeve is provided on the top of the spring, the outer circumferential surface of the support sleeve matches with the inner wall surface of the channel, and the support sleeve is provided with a notch along the circumferential direction for the passage of fluid.

[0014] Preferably, the sealing component is a steel ball; and a hand wheel is provided at the rear end of the screw.

[0015] Preferably, a first sealing ring is provided between the valve stem and the positioning sleeve; a second sealing ring is provided at the front end of the valve sleeve; and a third sealing ring is provided outside the positioning sleeve.

[0016] Preferably, the matching threads of the screw and the valve cover are configured as a left-handed thread structure.

[0017] The second aspect of the present invention is:

[0018] Provide a method of reverse opening valve:

[0019] The valve comprises a valve block and a valve core, wherein the valve block is provided with a valve core installation cavity, and a liquid inlet channel and a liquid outlet channel communicated with the valve core installation cavity;

[0020] The valve core comprises an opening and closing assembly, which comprises a valve sleeve, on which a liquid inlet hole and a liquid outlet hole are connected, and a sealing component and an elastic component are arranged inside the valve sleeve, and under the action of the elastic component, the sealing component blocks the liquid inlet hole; an actuator is arranged beside the opening and closing assembly, and the actuator comprises a valve stem and a positioning sleeve, the valve stem is arranged in the positioning sleeve, and a liquid flow channel is arranged between the valve sleeve and the positioning sleeve, so that the liquid can reach the liquid inlet hole through the liquid flow channel; the valve core also comprises a screw and a valve cover, and the valve cover is provided with a screw hole corresponding to the screw, and the front end of the screw is connected to the rear end of the valve stem; the valve core is installed in the valve block, and the liquid flow channel and the liquid outlet hole are respectively connected with the liquid inlet hole and the liquid outlet hole;

[0021] The method of reverse opening the valve is:

[0022] The screw is screwed inward, so that the screw drives the valve stem to move forward along the positioning sleeve, the front end of the valve stem pushes the sealing component, the elastic component is compressed, so that the sealing component is separated from the seal of the liquid inlet hole, the liquid inlet hole is opened, and the liquid inlet channel is connected with the liquid outlet channel;

[0023] Within a certain range, the greater the distance that the screw is screwed inward, the greater the opening of the liquid inlet hole.

[0024] Preferably, a plurality of first support blocks are provided at intervals along the circumferential direction on the front end surface of the positioning sleeve of the valve core, and a plurality of second support blocks are provided at intervals on the outer circumference of the rear end of the valve sleeve. The front end surface of the first support block is supported on the top surface of the second support block, and the gap between the first support block and the second support block forms the liquid flow channel.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The reverse opening cartridge stop valve comprises a valve block and a valve core, the valve core comprises an opening and closing assembly and an actuator, wherein the opening and closing assembly comprises a valve sleeve, the valve sleeve is provided with a liquid inlet hole and a liquid outlet hole which are connected to each other, a sealing component and an elastic component are provided inside the valve sleeve, under the action of the elastic component, the sealing component blocks the liquid inlet hole, the actuator comprises a valve stem and a positioning sleeve, when the valve core is manipulated to open, the valve stem is pushed inwardly so that the ejector pin at the front end of the valve stem pushes open the sealing component in the valve sleeve, so that the liquid inlet hole is opened, therefore, compared with the traditional valve core, the reverse opening cartridge stop valve opens the valve core by manipulating the valve stem to move inwardly, and closes the valve core by manipulating the valve stem to move outwardly, which is opposite to the traditional manipulation method, so that the torque applied to the valve stem when closing the valve core is smaller, and the operation is more labor-saving, so that a hand wheel with a smaller diameter can be used, and the size of the valve can be reduced, so that the size of the valve can adapt to equipment with high integration of hydraulic components and small operating position space.

[0027] 2. The matching threads of the screw and the valve cover of the reverse opening plug-in stop valve are set to a left-hand thread structure to ensure that the operating direction of the handwheel when the valve core is opened or closed is consistent with the operating direction of the existing conventional valve, reducing the possibility of misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of an embodiment of a reverse opening plug-in stop valve of the present invention.

[0030] Figure 2 It is a three-dimensional structural schematic diagram of the valve core in one embodiment of the reverse opening plug-in stop valve of the present invention.

[0031] Figure 3 This is an exploded view of the valve core in one embodiment of the reverse-opening cartridge stop valve of the present invention.

[0032] Figure 4 It is a cross-sectional view of an opening and closing component of a valve core in one embodiment of a reverse opening plug-in stop valve of the present invention.

[0033] Figure 5 The figure is an exploded view of the opening and closing components of the valve core in one embodiment of the reverse opening plug-in stop valve of the present invention.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the support sleeve of the valve core in one embodiment of the reverse-opening plug-in stop valve of the present invention.

[0035] Figure 7 It is a cross-sectional view of a valve core in an embodiment of a reverse-opening cartridge stop valve of the present invention.

[0036] In the figure, the reference numerals are indicated as: valve sleeve 1, liquid inlet hole 11, liquid outlet hole 12, steel ball 13, spring 14, spring limit seat 15, screw 151, channel 16, support sleeve 17, notch 171, second sealing ring 18, second support block part 19, valve stem 2, T-shaped hole 21, first sealing ring 22, positioning sleeve 3, first support block part 31, third sealing ring 32, screw 4, T-shaped block 41, hand wheel 42, valve cover 5, screw hole 51, valve block 6. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] A reverse opening cartridge stop valve, see Figures 1 to 7 .

[0039] like Figure 1 As shown, the reverse opening plug-in stop valve includes a valve block 6 and a valve core. The valve block 6 is provided with a valve core installation cavity 63, and a liquid inlet channel 61 and a liquid outlet channel 62 connected to the valve core installation cavity 63. The valve core is arranged in the valve core installation cavity 63.

[0040] The valve core includes an opening and closing component and an actuator arranged next to the opening and closing component. The actuator is used to operate the opening and closing of the opening and closing component. When the opening and closing component is opened, the valve core is opened, and when the opening and closing component is closed, the valve core is closed.

[0041] Among them, Figure 2-Figure 5 As shown, the opening and closing assembly includes a valve sleeve 1, which is provided with a liquid inlet hole 11 and a liquid outlet hole 12 that are connected to each other. A sealing component and an elastic component are provided inside the valve sleeve 1. Under the action of the elastic component, the sealing component blocks the liquid inlet hole. In this embodiment, the sealing component is a steel ball 13, and the elastic component is a spring 14. A spring limiting seat 15 is installed at the liquid outlet hole 12. The spring limiting seat 15 is installed at the port of the liquid outlet hole 12 by a screw 151. The spring 14 is located in a channel 16 between the liquid inlet hole 11 and the liquid outlet hole 12. The bottom of the spring 14 is supported on the spring limiting seat 15. A support sleeve 17 is provided on the top of the spring 14. The outer peripheral surface of the support sleeve 17 cooperates with the inner wall surface of the channel 16, so that the spring 14 will not tilt during the expansion and contraction process. Figure 6 As shown, the support sleeve 17 is provided with notches 171 for passing fluid along the circumferential direction, so that the support sleeve 17 will not block the hole 16 .

[0042] like Figure 2 and Figure 3 As shown, the actuator includes a valve stem 2 and a positioning sleeve 3. The valve stem 2 is arranged in the positioning sleeve 3. A liquid flow channel is arranged between the valve sleeve 1 and the positioning sleeve 3. Specifically, as shown in FIG. Figure 2 and Figure 3 As shown, the front end face of the positioning sleeve 3 is provided with a plurality of first support blocks 31 spaced apart along the circumferential direction, and the outer periphery of the rear end of the valve sleeve 1 is provided with a plurality of second support blocks 19 spaced apart. The front end face of the first support block 31 is supported on the top surface of the second support block 19, so that there is a gap between the front end of the positioning sleeve 3 and the rear end of the valve sleeve 1, and the gap is the liquid flow channel.

[0043] There is no connection between the valve sleeve 1 and the positioning sleeve 3. The valve sleeve 1 and the positioning sleeve 3 have fixed installation positions in the valve block 6. Figure 7 As shown, when the valve stem 2 moves forward along the positioning sleeve 3, the front end of the valve stem 2 can push the steel ball 13, so that the liquid inlet hole 11 is opened, and thus the valve core is opened.

[0044] Further, such as Figure 7 As shown, the reverse opening plug-in stop valve also includes a screw rod 4 and a valve cover 5, wherein the valve cover 5 is provided with a screw hole 51 corresponding to the screw rod 4, the screw rod 4 is screwed in the screw hole 51, and the valve cover 5 is provided with a connecting screw hole 52, so that the valve cover 5 can be installed on the valve block. The front end of the screw rod 4 is connected to the rear end of the valve stem 2, as shown in FIG. Figure 3 As shown, a T-shaped hole 21 is provided at the rear end of the valve stem 2, and a T-shaped block 41 is provided at the front end of the screw 4. The T-shaped block 41 is stuck in the T-shaped hole 21 to realize the connection between the valve stem 2 and the screw 4. A handwheel 42 is provided at the rear end of the screw 4. The rear end of the screw 4 is a square structure, and a corresponding square hole is provided in the middle of the handwheel 42. The rear end of the screw 4 cooperates with the square hole in the handwheel 42 and is fixed by screws and washers. When the screw 4 is turned by the handwheel 42, the valve stem 2 can be driven to move forward and backward.

[0045] The matching threads of the screw rod 4 and the valve cover 5 are set as a left-hand thread structure to ensure that the operating direction of the hand wheel when the valve core is opened or closed is consistent with the operating direction of the existing conventional valve, thereby reducing the possibility of misoperation.

[0046] Further, such as Figure 7 As shown, a first sealing ring 22 is provided between the valve stem 2 and the positioning sleeve 3, an annular groove is provided on the outer periphery of the valve stem 2, and the first sealing ring 22 is arranged in the annular groove; the front end of the valve sleeve 1 is a conical surface, and a second sealing ring 18 is provided on the front end of the conical surface; a third sealing ring 32 is provided outside the positioning sleeve 3, an annular groove is provided on the outer periphery of the positioning sleeve 3, and the third sealing ring 32 is arranged in the annular groove.

[0047] Combination Figure 1 As shown, the reverse opening plug-in stop valve is used as follows:

[0048] The valve core is closed: the screw rod 4 is rotated by turning the hand wheel 42, so that it withdraws outward and drives the valve stem 2 to retreat. At this time, the ejector pin at the front end of the valve stem 2 and the steel ball 13 in the valve sleeve 1 are separated. Under the action of the elastic force of the spring 14, the steel ball 13 seals the liquid inlet hole 11.

[0049] The valve core is opened: the screw rod 4 is rotated by turning the hand wheel 42 to move it inward and push the valve stem 2 to move, so that the ejector pin at the front end of the valve stem 2 pushes open the steel ball 13 in the valve sleeve 1, and the liquid inlet hole 11 is opened, so that the liquid inlet T is connected with the liquid outlet P, so that the fluid can flow back. By controlling the inward movement distance of the screw rod 4, the gap opened by the steel ball 13 can be controlled, so that the flow rate of the fluid can be controlled.

[0050] A method for reverse opening a valve, the valve being the reverse opening plug-in stop valve in the above embodiment, the method for reverse opening a valve comprising: combining Figure 1 As shown, the screw rod 4 is turned inward, so that the screw rod 4 drives the valve stem 2 to move forward along the positioning sleeve 3, and the front end of the valve stem 2 pushes the sealing component (steel ball 13), and the elastic component (spring 14) is compressed, so that the sealing component (steel ball 13) is separated from the seal of the liquid inlet hole 11, and the liquid inlet hole 11 is opened, and the liquid inlet channel 61 is connected with the liquid outlet channel 62, and the valve is opened. Since the valve adopts a reverse opening method, it is more labor-saving to open.

[0051] In addition, within a certain range, the greater the distance that the screw rod 4 is screwed inward, the greater the degree to which the sealing component (steel ball 13) is separated from the sealing of the liquid inlet hole 11, and the greater the opening of the liquid inlet hole 11.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reverse opening plug-in stop valve, characterized in that: include: A valve block, wherein the valve block is provided with a valve core installation cavity, and a liquid inlet channel and a liquid outlet channel communicated with the valve core installation cavity; The valve core comprises an opening and closing component, the opening and closing component comprises a valve sleeve, the valve sleeve is provided with a liquid inlet hole and a liquid outlet hole which are connected to each other, a sealing component and an elastic component are provided inside the valve sleeve, and under the action of the elastic component, the sealing component blocks the liquid inlet hole; an actuator is provided beside the opening and closing component, the actuator comprises a valve stem and a positioning sleeve, the valve stem is arranged in the positioning sleeve, a liquid flow channel is provided between the valve sleeve and the positioning sleeve, so that the liquid can reach the liquid inlet hole through the liquid flow channel; the valve core also comprises a screw and a valve cover, the valve cover is provided with a screw hole corresponding to the screw, and the front end of the screw is connected to the rear end of the valve stem; The valve core is installed in the valve core installation cavity of the valve block, the valve cover is connected to the valve block, and the liquid flow channel and the liquid outlet are communicated with the liquid inlet channel and the liquid outlet channel respectively. When the valve stem moves forward along the positioning sleeve, the front end of the valve stem can push the sealing component to open the liquid inlet hole. The front end surface of the positioning sleeve is provided with a plurality of first support blocks at intervals along the circumferential direction, and the outer circumference of the rear end of the valve sleeve is provided with a plurality of second support blocks at intervals, and the front end surface of the first support block is supported on the top surface of the second support block, so that the front end of the positioning sleeve and the rear end of the valve sleeve form the liquid flow channel; A T-shaped hole is arranged at the rear end of the valve stem, and a T-shaped block is arranged at the front end of the screw rod. The T-shaped block is clamped in the T-shaped hole.

2. The reverse opening plug-in stop valve according to claim 1, characterized in that: The elastic component is a spring, and a spring limiting seat is installed in the liquid outlet. The spring is located in the channel between the liquid inlet and the liquid outlet, and the bottom of the spring is supported on the spring limiting seat.

3. The reverse opening plug-in stop valve according to claim 2, characterized in that: A support sleeve is provided on the top of the spring, the outer peripheral surface of the support sleeve matches the inner wall surface of the channel, and the support sleeve is provided with a notch for passing the fluid along the circumferential direction.

4. The reverse opening plug-in stop valve according to claim 1, characterized in that: The sealing component is a steel ball; a hand wheel is arranged at the rear end of the screw.

5. The reverse opening plug-in stop valve according to claim 1, characterized in that: A first sealing ring is arranged between the valve stem and the positioning sleeve; a second sealing ring is arranged at the front end of the valve sleeve; and a third sealing ring is arranged outside the positioning sleeve.

6. The reverse opening plug-in stop valve according to claim 1, characterized in that: The matching threads of the screw and the valve cover are arranged as a left-hand thread structure.

7. A method for opening a valve in reverse, characterized in that: The valve comprises a valve block and a valve core, wherein the valve block is provided with a valve core installation cavity, and a liquid inlet channel and a liquid outlet channel communicated with the valve core installation cavity; The valve core comprises an opening and closing assembly, which comprises a valve sleeve, on which a liquid inlet hole and a liquid outlet hole are connected, and a sealing component and an elastic component are arranged inside the valve sleeve, and under the action of the elastic component, the sealing component blocks the liquid inlet hole; an actuator is arranged beside the opening and closing assembly, and the actuator comprises a valve stem and a positioning sleeve, the valve stem is arranged in the positioning sleeve, and a liquid flow channel is arranged between the valve sleeve and the positioning sleeve, so that the liquid can reach the liquid inlet hole through the liquid flow channel; the valve core also comprises a screw and a valve cover, and the valve cover is provided with a screw hole corresponding to the screw, and the front end of the screw is connected to the rear end of the valve stem; the valve core is installed in the valve block, and the liquid flow channel and the liquid outlet hole are respectively connected with the liquid inlet hole and the liquid outlet hole; The method of reverse opening the valve is: The screw is screwed inward, so that the screw drives the valve stem to move forward along the positioning sleeve, the front end of the valve stem pushes the sealing component, the elastic component is compressed, so that the sealing component is separated from the seal of the liquid inlet hole, the liquid inlet hole is opened, and the liquid inlet channel is connected with the liquid outlet channel; Within a certain range, the greater the distance that the screw is screwed inward, the greater the opening of the liquid inlet hole.

8. The method for reversely opening a valve according to claim 7, characterized in that: A plurality of first support blocks are arranged at intervals along the circumferential direction on the front end surface of the positioning sleeve of the valve core, and a plurality of second support blocks are arranged at intervals on the outer circumference of the rear end of the valve sleeve. The front end surface of the first support block is supported on the top surface of the second support block, and the gap between the first support block and the second support block forms the liquid flow channel.

Images