Special stop valve

Abstract

The special stop valve comprises a valve body, a valve rod installed on the valve body, a flow channel and a valve clack, the flow channel and the valve clack are arranged in the valve body, the valve clack is connected with the valve rod, an inlet valve pipe and an outlet valve pipe are arranged at the two ends of the flow channel respectively, and a first opening is formed in the upper portion of the inlet valve pipe; a filter plate is arranged on the inner side of the connecting frame, a second opening is formed in the lower portion, corresponding to the first opening, of the inlet valve pipe, a supporting block is arranged on the inner wall of the upper portion of the second opening, an annular groove is formed in the inner wall of the lower portion of the second opening, the annular groove is provided with an internal thread, a groove is formed in the top of the supporting block, and the bottom of the filter plate is connected with the groove in a clamped mode. A connecting ring is arranged at the top of the discharging barrel, external threads are arranged on the surface of the connecting ring, a pressure relief part is arranged on the side wall of the discharging barrel, a third opening communicated with the discharging barrel is formed in the pressure relief part, a piston plate and a piston rod are arranged on the inner wall of the pressure relief part, and the piston rod is sleeved with a reset spring; the piston rod is far away from the extending pressure relief part of the piston plate.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a special stop valve. Background Art

[0002] The stop valve, also called the cut-off valve, is the most widely used valve. The reason why it is so popular is that the friction between the sealing surfaces is small during the opening and closing process, it is relatively durable, the opening height is not large, it is easy to manufacture and maintain, and it is not only suitable for medium and low pressure, but also for high pressure. The closing principle of the stop valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of the medium. The valve plays an important role in cutting off and throttling the medium in the pipeline where it is located. As an extremely important cut-off valve, the stop valve is sealed by applying torque to the valve stem. The valve stem applies pressure to the valve disc in the axial direction, so that the valve disc sealing surface fits closely with the valve seat sealing surface to prevent the medium from leaking along the gap between the sealing surfaces.

[0003] Some stop valves are widely used, but ordinary stop valves cannot be used to filter fluids with particles and viscous impurities. The reason is that the internal piping settings of the stop valve are more complicated than those of general valves. The impurity particles in the fluid with particles and viscous impurities are easily retained in the stop valve, causing the flow volume of the flow channel to change, affecting the flow efficiency. If they adhere to the valve disc, the shape of the valve disc will change, affecting the normal opening and closing function, and may eventually cause the stop valve to fail. Utility Model Content

[0004] The utility model aims at providing a special stop valve to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a special stop valve, comprising a valve body, a valve stem installed on the valve body, and a flow channel and a valve disc arranged in the valve body, the valve disc is connected to the valve stem, and an inlet valve pipe and an outlet valve pipe are respectively arranged at both ends of the flow channel, and a semi-annular first opening is arranged above the inlet valve pipe; it also includes a connecting frame adapted to the shape of the first opening, the connecting frame is detachably connected to the opening, a filter plate is arranged on the inner side of the connecting frame, the lower end of the filter plate is inclined toward the direction of the valve body, the filter plate includes an outer ring and a filter screen, the inlet valve pipe is provided with a second opening below corresponding to the first opening, and the second opening A support block is provided on the upper inner wall, and an annular groove is provided on the lower inner wall, the annular groove is provided with an internal thread, a groove is provided on the top of the support block, and the bottom of the filter plate is clamped with the groove; it also includes a discharge barrel, a connecting ring is provided on the top of the discharge barrel, and the surface of the connecting ring is provided with an external thread and can be threadedly connected with the annular groove, a pressure relief part is provided on the side wall of the discharge barrel, and the pressure relief part is provided with a third opening connected to the discharge barrel, a slidable piston plate and a piston rod connected to the movable plate are provided on the inner wall of the pressure relief part, a return spring is sleeved on the piston rod, one end of the return spring is against the piston plate and the other end is against the end wall of the pressure relief part, and the piston rod is arranged outside the pressure relief part away from the piston plate.

[0006] By adopting the above technical scheme, the connecting frame is connected to the inlet pipe through the first opening, and the filter plate is clamped with the groove of the support block, thereby cutting off the inside of the inlet pipe, and the connecting ring of the discharge barrel is threadedly connected and installed with the inner wall of the second opening. When the fluid enters the valve body from the inlet pipe, the impurities therein are intercepted by the filter plate. Because the filter plate is inclined, the impurities will fall into the second opening and enter the discharge barrel under the action of gravity. When the discharge barrel needs to be cleaned, the outer end of the piston tube is pulled, so that the piston plate will be pulled to move in the pressure relief part, thereby generating negative pressure to suck the impurities into the third opening, thereby reducing the pressure in the discharge passage, and then the discharge barrel is rotated to disassemble it, so as to prevent impurities from overflowing due to the pressure difference, loosen the piston rod, and the reset spring extends to push the piston plate to push the impurities back into the discharge barrel. Finally, the impurities in the discharge pipe are cleaned. When the filter plate needs to be cleaned, the connecting frame is disassembled for cleaning, thereby realizing effective cleaning of impurities in the stop valve, which is easy to operate and convenient and labor-saving.

[0007] As a further optimization of the present invention, a blocking block is provided on the inner wall above the second opening on a side away from the valve body, and the top of the blocking block is set as an arc surface and the bottom is set as a plane.

[0008] By adopting the above technical solution, impurities enter the discharge barrel through the top of the blocking block. The arc surface can prevent the impurities from hanging on the wall and remaining. The plane is provided to block the impurities in the discharge channel to prevent backflow.

[0009] As a further optimization of the present invention, the bottom of the support block is configured as a curved surface.

[0010] By adopting the above technical solution, impurities enter the discharge channel through the bottom of the support block, and the provision of the arc surface can prevent the impurities from hanging on the wall and remaining.

[0011] As a further optimization of the utility model, the inlet valve pipe is provided with raised mounting parts on both sides of the opening, and a connecting groove is opened above the mounting part. The side wall of the connecting groove close to the first opening is connected with the first opening, and the side wall away from the first opening is provided with a through hole. Connecting blocks are provided on both sides of the connecting frame, and the connecting blocks are provided with connecting springs and arc clamping blocks, and the arc clamping block elastically passes through the through hole through the connecting spring.

[0012] As a further optimization of the present invention, sealing gaskets are provided on the side walls of the connecting frame opposite to the first opening.

[0013] By adopting the above technical solution, a sealing gasket is provided to improve the sealing performance when the connecting frame and the first opening are installed.

[0014] As a further optimization of the present invention, a lifting rod is provided on the top of the connecting frame.

[0015] By adopting the above technical solution, the lifting rod facilitates the operation of picking up and moving.

[0016] The beneficial effects of the utility model are as follows: the connecting frame is connected to the inlet pipe through the first opening, and the filter plate is clamped with the groove of the support block, thereby cutting off the inside of the inlet pipe, and the connecting ring of the discharge barrel is threadedly connected and installed with the inner wall of the second opening. When the fluid enters the valve body from the inlet pipe, the impurities therein are intercepted by the filter plate, and because the filter plate is inclined, the impurities will fall into the second opening and enter the discharge barrel under the action of gravity. When the discharge barrel needs to be cleaned, the outer end of the piston tube is pulled, so that the piston plate will be pulled to move in the pressure relief part, thereby generating negative pressure to suck the impurities into the third opening, thereby reducing the pressure in the discharge passage, and then the discharge barrel is rotated to disassemble it, thereby preventing impurities from overflowing under the action of pressure, loosening the piston rod, and the return spring extends to push the piston plate to push the impurities back into the discharge barrel, and finally the impurities in the discharge pipe are cleaned. When the filter plate needs to be cleaned, the connecting frame is disassembled for cleaning, thereby realizing effective cleaning of impurities in the stop valve, and the operation is simple, convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of

[0019] Figure 3 This is a schematic diagram of the connection structure between the inlet valve pipe and the connecting frame in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the discharge barrel in the utility model.

[0021] The meaning of the numbers in the figure are as follows: 1. valve body; 11. valve disc; 12. valve stem; 13. inlet valve pipe; 14. outlet valve pipe; 21. first opening; 22. second opening; 221. annular groove; 23. support block; 231. groove; 3. connecting frame; 31. filter plate; 32. lifting rod; 33. sealing gasket; 4. discharge barrel; 41. connecting ring; 5. pressure relief part; 51. third opening; 52. piston plate; 53. return spring; 54. piston rod; 6. connecting block; 61. connecting spring; 62. arc clamp block; 7. mounting part; 71. connecting groove; 72. through hole; 8. blocking block. DETAILED DESCRIPTION

[0022] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0023] See attached Figure 1-4 The embodiment disclosed in the utility model further provides: a special stop valve, comprising a valve body 1, a valve stem 12 mounted on the valve body 1, and a flow channel and a valve disc 11 arranged in the valve body 1, the valve disc 11 is connected to the valve stem 12, and an inlet valve pipe 13 and an outlet valve pipe 14 are respectively arranged at both ends of the flow channel;

[0024] A semi-circular first opening 21 is provided above the inlet valve pipe 13; a connecting frame adapted to the shape of the first opening 21 is also included, and the connecting frame is detachably connected to the opening. Specifically, the inlet valve pipe 13 is provided with raised mounting portions 7 on both sides of the opening, and a connecting groove 71 is provided above the mounting portion 7. The side wall of the connecting groove 71 close to the first opening 21 is connected to the first opening 21, and a through hole 72 is provided on the side wall away from the first opening 21. Both sides of the connecting frame are provided with connecting blocks 6, and the connecting blocks 6 are provided with connecting springs 61 and arc clamping blocks 62. The arc clamping blocks 62 elastically pass through the through holes 72 through the connecting springs 61;

[0025] A filter plate 31 is provided on the inner side of the connecting frame, and the lower end of the filter plate 31 is inclined toward the valve body 1. The filter plate 31 includes an outer ring and a filter screen. Furthermore, a lifting rod 32 is provided on the top of the connecting frame, and sealing gaskets 33 are provided on the side walls of the connecting frame 3 opposite to the first opening 21.

[0026] The inlet valve pipe 13 is provided with a second opening 22 below corresponding to the first opening 21, a support block 23 is provided on the upper inner wall of the second opening 22, and an annular groove 221 is provided on the lower inner wall, the annular groove 221 is provided with an internal thread, the top of the support block 23 is provided with a groove 231, and the bottom of the filter plate 31 is clamped with the groove 231; it also includes a discharge barrel 4, the top of the discharge barrel 4 is provided with a connecting ring 41, the surface of the connecting ring 41 is provided with an external thread and can be threadedly connected with the annular groove 221, the side wall of the discharge barrel 4 is provided with a pressure relief portion 5, the pressure relief portion 5 is provided with a third opening 51 connected with the discharge barrel 4, the inner wall of the pressure relief portion 5 is provided with a slidable piston plate 52 and a piston rod 54 connected with a movable plate, a return spring 53 is sleeved on the piston rod 54, one end of the return spring 53 is against the piston plate 52, and the other end is against the end wall of the pressure relief portion 5, and the piston rod 54 is arranged outside the pressure relief portion 5 away from the piston plate 52;

[0027] Furthermore, a blocking block 8 is provided on the inner wall of the side above the second opening 22 away from the valve body 1. The top of the blocking block 8 is set as an arc surface and the bottom is set as a plane. The bottom of the support block 23 is set as an arc surface. Impurities enter the discharge barrel 4 through the top of the blocking block 8. The arc surface can prevent impurities from hanging on the wall. The plane is set to block the impurities in the discharge channel to prevent backflow. Impurities enter the discharge channel through the bottom of the support block 23. The arc surface can prevent impurities from hanging on the wall.

[0028] The principle of the utility model is: the connecting frame 3 is connected to the inlet pipe through the first opening 21. Specifically, the connecting block 6 is inserted into the connecting groove 71, and the arc block 62 is squeezed and the connecting spring 61 is compressed. When the arc block 62 corresponds to the through hole 72, the connecting spring 61 is reset to push the arc block 62 into the through hole 72, so that the connecting frame 3 is locked and connected with the first opening 21. The sealing gasket 33 is provided to improve the sealing performance of the connecting frame 3 and the first opening 21 when they are installed.

[0029] At the same time, the filter plate 31 is engaged with the groove 231 of the support block 23, thereby cutting off the inside of the inlet pipe, and the connecting ring 41 of the discharge barrel 4 is threadedly connected and installed with the inner wall of the second opening 22. When the fluid enters the valve body 1 from the inlet pipe, the impurities therein are intercepted by the filter plate 31. Since the filter plate 31 is tilted, the impurities will fall into the second opening 22 and enter the discharge barrel 4 under the action of gravity. When the discharge barrel 4 needs to be cleaned, the outer end of the piston tube is pulled, thereby pulling the piston plate 52 to move in the pressure relief part 5, thereby generating a negative pressure. The impurities are sucked into the third opening 51 by pressure, thereby reducing the pressure in the discharge channel, and the discharge barrel 4 is then rotated to disassemble it, thereby preventing impurities from overflowing under the action of pressure, loosening the piston rod 54, and the return spring 53 extends to push the piston plate 52 to push the impurities back into the discharge barrel 4, and finally the impurities in the discharge pipe are cleaned. When the filter plate 31 needs to be cleaned, it will be disassembled for cleaning through the connecting frame 3. The lifting rod 32 facilitates the operation of taking and moving, thereby effectively cleaning the impurities in the stop valve, which is easy to operate, convenient and labor-saving.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A special stop valve, comprising a valve body (1), a valve stem (12) mounted on the valve body (1), and a flow channel and a valve flap (11) arranged in the valve body (1), wherein the valve flap (11) is connected to the valve stem (12), and an inlet valve pipe (13) and an outlet valve pipe (14) are respectively arranged at both ends of the flow channel, characterized in that: A semi-circular first opening (21) is provided above the inlet valve pipe (13); a connecting frame adapted to the shape of the first opening (21), the connecting frame being detachably connected to the opening, a filter plate (31) being provided on the inner side of the connecting frame, the lower end of the filter plate (31) being inclined toward the valve body (1), a second opening (22) being provided below the inlet valve pipe (13) corresponding to the first opening (21), a support block (23) being provided on the upper inner wall of the second opening (22), and an annular groove (221) being provided on the lower inner wall, the annular groove (221) being provided with an internal thread, a groove (231) being provided on the top of the support block (23), and the bottom of the filter plate (31) being snap-fitted with the groove (231); and The invention comprises a discharge barrel (4), wherein a connecting ring (41) is provided on the top of the discharge barrel (4), wherein the surface of the connecting ring (41) is provided with an external thread and can be threadedly connected to an annular groove (221), wherein a pressure relief portion (5) is provided on the side wall of the discharge barrel (4), wherein the pressure relief portion (5) is provided with a third opening (51) connected to the discharge barrel (4), wherein the inner wall of the pressure relief portion (5) is provided with a slidable piston plate (52) and a piston rod (54) connected to a movable plate, wherein a return spring (53) is sleeved on the piston rod (54), wherein one end of the return spring (53) abuts against the piston plate (52) and the other end abuts against the end wall of the pressure relief portion (5), and wherein the piston rod (54) is arranged outside the pressure relief portion (5) away from the piston plate (52) and extending out of the pressure relief portion (5).

2. A special stop valve according to claim 1, characterized in that: A blocking block is provided on the inner wall of the second opening (22) on the side away from the valve body (1), wherein the top of the blocking block is arranged as an arc surface and the bottom is arranged as a plane.

3. A special stop valve according to claim 1 or 2, characterized in that: The bottom of the support block (23) is configured as a curved surface.

4. A special stop valve according to claim 1, characterized in that: The inlet valve pipe (13) is provided with raised mounting portions (7) on both sides of the opening, a connecting groove (71) is provided above the mounting portion (7), a side wall of the connecting groove (71) close to the first opening (21) is connected to the first opening (21), and a through hole (72) is provided on the side wall away from the first opening (21), and connecting blocks (6) are provided on both sides of the connecting frame, and a connecting spring (61) and an arc clamping block (62) are provided on the connecting block (6), and the arc clamping block (62) elastically passes through the through hole (72) through the connecting spring (61).

5. A special stop valve according to claim 1, characterized in that: Sealing pads (33) are provided on the side walls of the connecting frame (3) opposite to the first opening (21).

6. A special stop valve according to claim 1 or 4, characterized in that: A lifting rod (32) is provided on the top of the connecting frame.

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