Pigging valve easy to disassemble and replace

Abstract

The utility model relates to a pigging valve, in particular to a pigging valve easy to disassemble and replace, which belongs to the technical field of valves and comprises a driving device, a valve body, a valve cover, a valve rod, a valve seat, a ball and a quick-release mechanism, the upper end of the valve rod is connected with the driving device, and the lower end of the valve rod is fixedly connected with the ball. Annular radial steps are arranged on the inner walls of the flow channels at the two ends of the ball body, a matched annular radial boss is arranged on the end face of one end of the convenient-to-disassemble sleeve and clamped in the annular radial steps, a semi-arc reinforcing rib is fixedly arranged in the annular radial step at the other end of the flow channel of the ball body, and a quick-release mechanism is arranged at one end, perpendicular to the center line of the flow channel, of the valve cavity. The quick-release mechanism comprises a quick-release valve cover, a quick-release blind plate, a drain valve, a pressure release valve and a side hand wheel, the quick-release valve cover is in bolted connection with the valve body, one end of the quick-release blind plate is fixedly connected with the side hand wheel, and the other end of the quick-release blind plate is in sealed opening and closing connection with the quick-release valve cover.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe cleaning valves, in particular to an easily dismantled and replaceable pipe cleaning valve. Background Art

[0002] The cleaning valve is an important equipment for pipeline cleaning. At present, most cleaning valves adopt ball valve structure, and the opening and closing parts are spheres. By rotating around the center line of the valve stem perpendicular to the center line of the valve flow channel, the ball flow channel is connected or intersected with the valve body bonnet flow channel to realize the opening and closing of the valve. The cleaning valve needs to cooperate with the cleaning device to complete the cleaning work. In the existing technology, the same specification of cleaning valve cannot be adapted to the cleaning devices of different specifications. In the production process, it is necessary to use molds of various specifications for batch casting or different specifications of cleaning valves need to be forged separately, which is easy to cause waste of time and raw materials. Utility Model Content

[0003] The utility model provides an easily dismantled and replaceable pig valve to solve the adaptation problem of pigs and pig valves of different specifications and models.

[0004] The technical scheme of the utility model is: an easily dismantled and replaced cleaning pipe valve, comprising a driving device, a valve body, a valve cover, a valve stem, a valve seat, a ball and a quick-release mechanism, the valve body is provided with an inlet channel and an outlet channel, a valve cavity is arranged between the inlet and outlet channels, the valve seat is arranged at the end surface where the inlet and outlet channels are connected with the valve cavity, the valve seat is provided with an arc surface adapted to the sealing surface of the ball, and the sealing surface cooperates with the sealing surface of the ball to form a sealing pair, the upper end of the valve stem is connected to the driving device, and the lower end passes through the valve body and the valve cover to be fixedly connected to the ball, a stuffing box is arranged between the valve cover and the outer cylindrical surface of the valve stem, and a sealing stuffing is press-fitted in the stuffing box, and the characteristic is that it also comprises a dismantling sleeve, and the outer cylindrical wall of the dismantling sleeve is provided with an outer Thread, internal thread is provided on the inner wall of the spherical flow channel, the dismantling sleeve is sealed and connected to the spherical flow channel through external thread, annular radial steps are provided on the inner walls of the flow channel at both ends of the sphere, and a matching annular radial boss is provided on the end face of one end of the dismantling sleeve, the annular radial boss is clamped in the annular radial step, and an arc-shaped reinforcing rib is fixedly arranged in the annular radial step at the other end of the spherical flow channel, and a quick-release mechanism is provided on the side wall of the valve cavity in a direction perpendicular to the center line of the flow channel, the quick-release mechanism includes a quick-release valve cover, a quick-release blind plate, a discharge valve, a pressure relief valve and a side handwheel, the quick-release valve cover is bolted to the valve body, one end of the quick-release blind plate is fixedly connected to the side handwheel, and the other end is sealed and opened and closed with the quick-release valve cover.

[0005] Preferably, an automatic compensation device is provided between the sealing packing and the bottom surface of the stuffing box, comprising a spring and gaskets fixedly provided at both ends of the spring.

[0006] The beneficial effects of the utility model are as follows: a dismantling sleeve is threadedly connected to the inner wall of the spherical flow channel. The inner diameter of the opening and closing member can be changed by simply replacing the dismantling sleeve and utilizing different wall thicknesses of different dismantling sleeves, thereby adapting to pipe cleaners of different specifications, thereby improving production efficiency and saving waste of molds and raw materials in the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the structure of the utility model;

[0008] Figure 2 This is the AA-plane cross-sectional view of the utility model;

[0009] Figure 3 This is a BB-side cross-sectional view of the utility model;

[0010] Figure 4 It is an enlarged view of point G of the utility model.

[0011] In the figure: 1. valve stem; 2. pressure relief valve; 3. discharge valve; 4. valve body; 5. valve seat; 6. ball; 7. reinforcing rib; 8. easy-to-remove sleeve; 9. annular radial boss; 10. quick-release valve cover; 11. quick-release blind plate; 12. side handwheel; 13. valve cover; 14. gasket; 15. spring; 16. packing gland; 17. sealing packing. DETAILED DESCRIPTION

[0012] like Figure 1-4The easily replaceable cleaning valve shown in the figure comprises a driving device, a valve body 4, a valve cover 13, a valve stem 1, a valve seat 5, a ball 6 and a quick release mechanism. The valve body 4 is provided with an inlet channel and an outlet channel, a valve cavity is provided between the inlet and outlet channels, and the valve seat 5 is provided at the end surface where the inlet and outlet channels are connected to the valve cavity. The valve seat 5 is provided with an arc surface adapted to the ball sealing surface, and forms a sealing pair by sealing with the ball sealing surface. The upper end of the valve stem 1 is connected to the driving device, and the lower end passes through the valve body 4 and the valve cover 13 to be fixedly connected to the ball 6. The driving device drives the valve stem 1 to rotate, so that the flow channel of the ball 6 is in contact with the inlet and outlet channels. The passages are connected or staggered to achieve the opening or closing of the valve. A stuffing box is arranged between the valve cover 13 and the valve stem 1. A sealing stuffing 17 is press-fitted in the stuffing box to achieve the sealing of the middle cavity. The valve is characterized in that it also includes a dismantling sleeve 8. The outer circular wall of the dismantling sleeve 8 is provided with an external thread. The inner wall of the flow passage of the ball 6 is provided with an internal thread. The dismantling sleeve 8 is sealed and connected to the flow passage of the ball 6 through the external thread. By replacing the dismantling sleeve 8 with different wall thicknesses, the inner diameter of the flow passage of the opening and closing part can be changed to adapt to different specifications of pigs. The inner walls of the flow passages at both ends of the ball 6 are provided with annular radial steps, and one end face of the dismantling sleeve 8 is provided with a There is a matching annular radial boss 9, which is clamped in the annular radial step to limit the dismantling sleeve 8. The arc-shaped reinforcing rib 7 is fixedly clamped in the annular radial step at the other end of the flow channel of the spherical body 6. The side wall of the valve cavity in the direction perpendicular to the center line of the flow channel is provided with a quick-release mechanism. The quick-release mechanism includes a quick-release valve cover 10, a quick-release blind plate 11, a discharge valve 3, a pressure relief valve 2 and a side hand wheel 12. The quick-release valve cover 10 is bolted to the valve body 4. One end of the quick-release blind plate 11 is fixedly connected to the side hand wheel 12, and the other end is sealed and opened and closed with the quick-release valve cover 10, which can be toothed. The discharge valve 3 and the pressure relief valve 2 are connected in a sealed manner or by a rubber sealing ring. The discharge valve 3 and the pressure relief valve 2 are connected in a valve body inner cavity through a discharge pipe and a pressure relief pipe respectively. When a pipe cleaner needs to be placed, the valve stem 1 is used to rotate the ball 6 to align the outlet end of the conveniently dismantled sleeve 8 with the quick-release mechanism, and the medium in the valve cavity is discharged through the discharge valve 3. Then, the pressure in the valve cavity is relieved through the pressure relief valve 2, and the quick-release blind plate 11 is opened. The pipe cleaner is placed in the conveniently dismantled sleeve 8, and the ball 6 is rotated to connect the outlet end of the conveniently dismantled sleeve 8 with the outlet flow channel. The pipe cleaner moves along the flow channel under the thrust of the medium to clean the pipeline.

[0013] like Figure 4 As shown, the sealing packing 17 is tightly connected with the packing gland 16, and an automatic compensation device is arranged between the lower end and the bottom surface of the stuffing box. The automatic compensation device includes a spring 15 and gaskets 14 fixedly arranged at both ends of the spring 15. When the sealing packing 17 is worn during use, the spring 15 pushes the gasket 14 to automatically compensate, so that the sealing packing 17 always presses the valve stem 1.

Claims

1. An easily replaceable cleaning valve, comprising a driving device, a valve body (4), a valve cover (13), a valve stem (1), a valve seat (5), a ball (6) and a quick release mechanism, wherein the valve body (4) is provided with an inlet channel and an outlet channel, a valve cavity is provided between the inlet channel and the outlet channel, the valve seat (5) is provided at the end surface where the inlet channel and the outlet channel are connected to the valve cavity, the valve seat (5) is provided with an arc surface adapted to the ball sealing surface, and forms a sealing pair by sealing with the ball sealing surface, the upper end of the valve stem (1) is connected to the driving device, and the lower end passes through the valve body (4) and the valve cover (13) to be fixedly connected to the ball (6), a stuffing box is provided between the valve cover (13) and the valve stem (1), and a sealing stuffing (17) is press-fitted in the stuffing box, and the valve stem (1) is characterized in that: The utility model also comprises a dismantling sleeve (8), wherein the outer circular wall of the dismantling sleeve (8) is provided with an external thread, the inner wall of the flow channel of the sphere (6) is provided with an internal thread, the dismantling sleeve (8) is thread-sealed with the inner wall of the flow channel of the sphere (6), annular radial steps are provided on the inner walls of the flow channel at both ends of the sphere (6), an end face of one end of the dismantling sleeve (8) is provided with a matching annular radial boss (9), the annular radial boss (9) is clamped in the annular radial step, an arc-shaped reinforcing rib (7) is fixedly clamped in the annular radial step at the other end of the flow channel of the sphere (6), a quick-release mechanism is provided on the side wall of the valve cavity in a direction perpendicular to the center line of the flow channel, the quick-release mechanism comprises a quick-release valve cover (10), a quick-release blind plate (11), a discharge valve (3), a pressure relief valve (2) and a side hand wheel (12), the quick-release valve cover (10) is bolted to the valve body (4), one end of the quick-release blind plate (11) is fixedly connected to the side hand wheel (12), and the other end is sealed and opened and closed with the quick-release valve cover (10).

2. The easily replaceable pig valve according to claim 1, characterized in that: An automatic compensation device is arranged between the lower end of the sealing packing (17) and the bottom surface of the packing box, and the automatic compensation device comprises a spring (15) and gaskets (14) fixedly arranged at both ends of the spring (15).

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