Energy-saving double-lining ceramic ball valve

Abstract

The utility model discloses an energy-saving double-lining ceramic ball valve, which relates to the technical field of valves and comprises a valve body, an upper valve cover assembled on the top of the valve body, flanges mounted at the left end and the right end of the valve body, fluoroplastic liners arranged in inner cavities of the valve body and the flanges, and an outlet valve seat mounted at the small-size end in an inner hole of the fluoroplastic liners. The valve body is provided with an outlet valve seat and a large-size end, a valve body lining is installed at the large-size end, an inlet valve seat is installed in an inner hole in the right side of the valve body lining, a ball valve element is assembled between the outlet valve seat and the inlet valve seat, and the valve body is sequentially provided with an upper counter bore, an upper hole step and an upper lower hole in the direction perpendicular to the axis of the outlet valve seat and the axis of the inlet valve seat. And a lower sinking hole, a lower hole step and a lower platform upper hole are sequentially arranged below the lower platform. According to the double-lining ball valve, the double-lining sealing design is adopted, the ceramic lining plays a role in wear resistance and sealing of the first shell, the fluoroplastic lining plays a role in sealing of the second shell, more reliable corrosion resistance and shell sealing effects are achieved, and the competitiveness of the double-lining ball valve on the working condition of strong corrosion and wear is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an energy-saving double-lined ceramic ball valve. Background Art

[0002] At present, in many chemical industries, there are many highly toxic and corrosive substances to metals, such as chloroacetic acid, naphthalenesulfonic acid, sulfuric acid slurry, etc. Once the medium leaks, it will cause great harm to the human body or the environment. In addition, the medium contains a lot of hard particle impurities. This requires that the valve must have high safety performance, cannot be frequently replaced and repaired, and must meet the requirements of erosion resistance and corrosion resistance, and can operate reliably for a long time. The existing fluorine-lined ball valve is corrosion-resistant but not wear-resistant, has a short life, and is frequently replaced. It has gradually been replaced by ceramic ball valves, but ceramics are hard and brittle, and are easy to break under special circumstances such as thermal shock. The medium is easy to corrode the shell and cause leakage. Utility Model Content

[0003] In order to solve the technical problems mentioned in the background technology, the utility model provides an energy-saving double-lined ceramic ball valve.

[0004] The utility model adopts the following technical solution: an energy-saving double-lined ceramic ball valve, comprising a valve body;

[0005] The valve cover is assembled on the top of the valve body;

[0006] A stuffing box is arranged in the inner cavity of the upper valve cover;

[0007] A packing pressure ring for compressing the stuffing box is arranged at the top end of the upper valve cover;

[0008] A lower valve cover is arranged at the bottom of the valve body;

[0009] Flanges are installed on the left and right ends of the valve body;

[0010] Fluoroplastic lining is provided in the inner cavity of the valve body and flange;

[0011] An outlet valve seat is installed at the end with a smaller size in the inner hole of the fluoroplastic liner;

[0012] The valve body liner is installed at the end with the larger size, and the inlet valve seat is installed in the inner hole on the right side of the valve body liner;

[0013] A ball valve core is installed between the outlet valve seat and the inlet valve seat;

[0014] The opposite sides of the spherical valve core are provided with through holes for the medium to flow.

[0015] The valve body is provided with an upper countersunk hole, an upper hole step, an upper platform and a lower hole in sequence above the valve body in a direction perpendicular to the axis of the outlet valve seat and the inlet valve seat; and a lower countersunk hole, a lower hole step and an upper hole on the lower platform in sequence below the valve body;

[0016] The outer circle of the upper valve cover is inserted into the inner hole of the upper countersunk hole, and its bottom is pressed against the upper hole step;

[0017] Install the shaft sleeve in the lower hole of the upper platform;

[0018] The valve stem passes through the upper valve cover and the shaft sleeve in sequence and is inserted on the top of the ball valve core;

[0019] Install the fixed shaft and gasket in the sink hole and the lower platform hole;

[0020] The fixed shaft presses the lower hole step upward, and the top end is inserted into the bottom of the ball valve core;

[0021] The lower valve cover is fixed to the bottom of the gasket by bolts to compress the gasket and fix the shaft.

[0022] Furthermore, a valve body liner installation groove, a valve body liner thrust surface, a spring installation groove, an outlet valve seat installation surface and an outlet flange are sequentially arranged in the fluoroplastic liner on the left side; the left end surface of the valve body liner is installed tightly against the valve body liner thrust surface; a first spring is installed in the spring installation hole so that the outlet valve seat is tightly attached to the left side of the ball;

[0023] The fluoroplastic lining on the right side is provided with a valve body lining mounting surface and an inlet flange in sequence;

[0024] The inner hole of the valve body lining is provided with a large channel hole and a small channel hole, wherein the large channel hole is adapted to the large diameter outer circle of the outlet valve seat; the inlet valve seat is installed in the small channel hole; a second spring is arranged in the clamping groove between the inlet valve seat and the right end face of the valve body lining, so that the inlet valve seat is tightly attached to the right side of the spherical valve core.

[0025] Furthermore, a blowout prevention step is arranged on the valve stem and abuts against the bottom end surface of the shaft sleeve; and the upper end surface of the shaft sleeve abuts against the bottom end surface of the upper valve cover.

[0026] Furthermore, a square hole is opened at the top of the spherical valve core, and the bottom of the valve stem is inserted into the square hole; a round hole is opened at the bottom of the spherical valve core, and the top of the fixed shaft is inserted into the round hole.

[0027] Furthermore, the bottom and upper hole step of the upper countersunk hole, the top and lower hole step of the lower countersunk hole are all coated with a fluoroplastic layer; the gaps between the upper valve cover, the upper hole step and the stuffing box are all coated with a fluoroplastic layer.

[0028] Furthermore, a first O-ring groove is provided on the outer circle of the inner lining of the valve body, and a second O-ring groove is provided on the small channel hole.

[0029] Furthermore, an O-ring mounting hole is provided at the fluoroplastic lining outlet on the left side.

[0030] Compared with the prior art, the advantages of the utility model are:

[0031] The energy-saving double-lined ceramic ball valve designed by the utility model adopts a double lining sealing design. The ceramic lining plays the role of wear resistance and the first shell sealing, and the fluoroplastic lining plays the role of the second shell sealing. It has a more reliable corrosion resistance and shell sealing effect, which improves the competitiveness of the double-lined ball valve in strong corrosion and wear conditions. The valve body adopts an integrated structure with flanges on both ends. Compared with a two-piece or three-piece valve body, it eliminates the leakage problem that may occur in the joint of the fluorine lining layer. The valve core adopts a fixed ball valve body with two-way sealing. The pressure area is much smaller than that of the floating ball type. The torque under high pressure difference is lower than that of the floating ball type, which makes the wear between the valve seat and the ball lighter and reduces wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the energy-saving double-lined ceramic ball valve of the utility model;

[0033] Figure 2 It is a partial structural schematic diagram of the energy-saving double-lined ceramic ball valve of the utility model;

[0034] Figure 3 It is a structural schematic diagram of the inner lining of the valve body of the utility model.

[0035] in:

[0036] 1-valve body, 2-outlet valve seat, 3-upper valve cover, 4-packing pressure ring, 5-ball valve core, 6-fixed shaft, 7-compression gasket, 8-lower valve cover, 9-valve stem, 10-shaft sleeve, 11-fluoroplastic lining, 12-flange, 13-inlet valve seat, 14-valve body lining, 15-first spring, 16-second spring,

[0037] 51-round hole, 52-square hole,

[0038] 91- anti-spray steps,

[0039] 111-spring installation groove, 112-valve body lining thrust surface, 113-valve body lining installation groove, 114-outlet valve seat installation surface, 115-outlet flange, 116-valve body lining installation surface, 117-inlet flange,

[0040] 121-upper countersunk hole, 122-upper hole step, 123-upper platform lower hole,

[0041] 131-sink hole, 132-lower hole step, 133-lower platform upper hole,

[0042] 141 - large channel hole, 142 - small channel hole, 143 - first O-ring groove, 144 - second O-ring groove. DETAILED DESCRIPTION

[0043] In order to facilitate those skilled in the art to understand the technical solution of the utility model, further description is now made with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model.

[0044] In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is apparent that one or more embodiments may be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0045] Please refer to Figure 1 , which is a schematic diagram of the overall structure of the energy-saving double-lined ceramic ball valve designed by the utility model, comprises a valve body 1, an upper valve cover 3 is assembled on the top of the valve body 1, a stuffing box is arranged in the inner cavity of the upper valve cover 20, a stuffing pressure ring 4 for compressing the stuffing box is arranged on the top of the upper valve cover 20, a lower valve cover 8 is arranged at the bottom of the valve body 1, flanges 12 are installed at the left and right ends of the valve body 1, a fluoroplastic liner 11 is arranged in the inner cavity of the valve body 1 and the flange 111, an outlet valve seat 2 is installed at the end with a smaller size in the inner hole of the fluoroplastic liner 11, a valve body liner 31 is installed at the end with a larger size, an inlet valve seat 13 is installed in the inner hole on the right side of the valve body liner 31, and a valve body liner 31 is installed between the outlet valve seat 2 and the inlet valve seat 13. A spherical valve core 5, through holes for medium flow are arranged on the opposite surfaces of the spherical valve core 5, and the valve body 1 is provided with an upper countersunk hole 121, an upper hole step 122, and an upper platform lower hole 123 in sequence above the axial direction perpendicular to the outlet valve seat 2 and the inlet valve seat 13, and a lower countersunk hole 131, a lower hole step 132 and a lower platform upper hole 133 in sequence below. The outer circle of the upper valve cover 3 is inserted into the inner hole of the upper countersunk hole 121, and its bottom is pressed against the upper hole step 122. The shaft sleeve 10 is installed in the upper platform lower hole 123, and the valve stem 9 passes through the upper valve cover 20 and the shaft sleeve 10 in sequence, and is inserted on the top of the spherical valve core 5. The valve stem 9 drives the spherical valve core 5 to rotate under the drive of the external power mechanism to open and close the flow channel. In this embodiment, the valve stem 9 is provided with a blowout prevention step 91 which abuts against the bottom end face of the shaft sleeve 10, and the upper end face of the shaft sleeve 10 abuts against the bottom end face of the upper valve cover 20 to prevent the valve stem from spraying out when the flow is too large. At the same time, the shaft sleeve 10 plays an axial fixing role on the valve stem 9. A square hole 52 is opened at the top of the spherical valve core 5, and the bottom of the valve stem 9 is inserted into the square hole 52. A round hole 51 is opened at the bottom of the spherical valve core 5, and the top of the fixed shaft 6 is inserted into the round hole 51. The fixed shaft 6 and the gasket 7 are installed in the sinking hole 131 and the lower platform upper hole 133. The fixed shaft 6 presses the lower hole step 132 upward, and the top end is inserted into the bottom of the spherical valve core 5. The lower valve cover 8 is fixedly installed at the bottom of the gasket by bolts to press the gasket 7 and the fixed shaft 6, and is used to press the gasket and the fixed shaft.

[0046] In specific implementation, the valve stem 9 can be made of two sections of material, which are welded in the middle. The upper section of the valve stem is made of conventional stainless steel, and the remaining part is made of a medium corrosion-resistant alloy, which reduces the use of corrosion-resistant alloys and reduces costs. The fixed shaft 6 is made of structural ceramics, and the sleeve 10 can be made of a corrosion-resistant polymer material.

[0047] The energy-saving double-lined ceramic ball valve designed by the utility model adopts a double lining sealing design. The ceramic lining plays the role of wear resistance and the first shell sealing, and the fluoroplastic lining plays the role of the second shell sealing. It has a more reliable corrosion resistance and shell sealing effect, which improves the competitiveness of the double-lined ball valve in strong corrosion and wear conditions. The valve body adopts an integrated structure with flanges on both ends. Compared with a two-piece or three-piece valve body, it eliminates the leakage problem that may occur in the joint of the fluorine lining layer. The valve core adopts a fixed ball valve body with two-way sealing. The pressure area is much smaller than that of the floating ball type. The torque under high pressure difference is lower than that of the floating ball type, which makes the wear between the valve seat and the ball lighter and reduces wear.

[0048] In this embodiment, the fluoroplastic liner 11 on the left side is provided with a valve body liner installation groove 113, a valve body liner thrust surface 112, a spring installation groove 111, an outlet valve seat installation surface 114 and an outlet flange 115 in sequence, and the left end surface of the valve body liner 14 is installed close to the valve body liner thrust surface 112. The first spring 15 is installed in the spring installation hole 111 so that the outlet valve seat 2 is closely attached to the left side of the sphere 5, and the fluoroplastic liner 11 on the right side is provided with a valve body liner installation surface 116 and an inlet flange 117 in sequence, and the inner hole of the valve body liner 14 is provided with a large channel hole 141 and a small channel hole 142, wherein the large channel hole 141 is adapted to the large diameter outer circle of the outlet valve seat 2, and the inlet valve seat 13 is installed in the small channel hole 142, and the second spring 16 is arranged in the clamping groove between the inlet valve seat 13 and the right end surface of the valve body liner 14, so that the inlet valve seat 13 is closely attached to the right side of the spherical valve core 5, thereby enhancing the sealing performance of the valve as a whole.

[0049] During the specific installation of this embodiment, the ceramic lining is installed in the inner cavity of the valve body after the fluoroplastic lining, and all are installed into the valve body from the large diameter end of the inlet to the small diameter end. The installation process is simple. Compared with the double-lined ball valve with a two-piece or three-piece valve body, the positioning and sealing relationship of this solution are simple and reliable. It is also more convenient to disassemble and inspect the valve for maintenance, and the maintenance period is shorter.

[0050] In addition, the bottom of the upper countersunk hole 121 and the upper hole step 122, the top of the lower countersunk hole 131 and the lower hole step 132 of the embodiment are all coated with a fluoroplastic layer. The gaps between the upper valve cover 3, the upper hole step 122 and the stuffing box are all coated with a fluoroplastic layer. The valve body of the embodiment is provided with a countersunk hole, a flange and a step in a direction perpendicular to the valve seat axis and is lined with fluoroplastic. The flanged fluoroplastic at the upper end and the fluoroplastic coated at the bottom of the valve cover are pressed tightly to form a shell seal, and the flanged fluoroplastic at the lower end and the step of the fixed shaft are pressed tightly to form a shell seal. The shell seal type at the upper and lower ends is simple and reliable. At the same time, the inner hole of the valve cover is fully lined with fluoroplastic to form a corrosion-resistant stuffing box structure, so that the upper valve cover does not need to select a corrosion-resistant alloy, and only conventional stainless steel can meet the corrosion resistance requirements.

[0051] In addition, as shown in the figure, in order to further enhance the sealing performance of the valve body as a whole, a first O-ring groove 143 is provided on the outer circle of the valve body liner 14, and a second O-ring groove 144 is provided on the small channel hole 142. An O-ring installation hole is provided at the outlet of the fluoroplastic liner 11 on the left side for installing a sealing ring.

[0052] In summary, the present embodiment has a simple overall structure and reliable performance, which greatly reduces the manufacturing and maintenance costs of the double-lined ball valve and improves the competitiveness of the double-lined ball valve in strong corrosive and wear conditions.

[0053] The above embodiments are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. An energy-saving double-lined ceramic ball valve, characterized in that: comprising a valve body (1); The top of the valve body (1) is assembled with a valve cover (3); A stuffing box is arranged in the inner cavity of the upper valve cover (3); A packing pressure ring (4) for compressing the packing box is arranged at the top end of the upper valve cover (3); A lower valve cover (8) is arranged at the bottom of the valve body (1); The valve body (1) is provided with flanges (12) at both left and right ends; A fluoroplastic lining (11) is arranged in the inner cavity of the valve body (1) and the flange (12); An outlet valve seat (2) is installed at the end with a smaller size in the inner hole of the fluoroplastic lining (11); A valve body liner (14) is installed at the end with a larger size, and an inlet valve seat (13) is installed in the inner hole on the right side of the valve body liner (14); A spherical valve core (5) is installed between the outlet valve seat (2) and the inlet valve seat (13); Through holes for medium flow are arranged on opposite sides of the spherical valve core (5); The valve body (1) is provided with an upper sink hole (121), an upper hole step (122), and an upper platform lower hole (123) in sequence above the valve body (1) in a direction perpendicular to the axis of the outlet valve seat (2) and the inlet valve seat (13); and a lower sink hole (131), a lower hole step (132), and a lower platform upper hole (133) in sequence below the valve body (1). The outer circle of the upper valve cover (3) is inserted into the inner hole of the upper countersunk hole (121), and the bottom thereof is pressed against the upper hole step (122); A shaft sleeve (10) is installed in the lower hole (123) of the upper platform; The valve stem (9) passes through the upper valve cover (3) and the shaft sleeve (10) in sequence, and is inserted into the top of the spherical valve core (5); A fixed shaft (6) and a gasket (7) are installed in the sinking hole (131) and the lower platform upper hole (133); The fixed shaft (6) presses the lower hole step (132) upward, and the top end is inserted into the bottom of the spherical valve core (5); The lower valve cover (8) is fixedly mounted on the bottom of the gasket by bolts to compress the gasket (7) and fix the shaft (6).

2. The energy-saving double-lined ceramic ball valve according to claim 1 is characterized in that: The fluoroplastic lining (11) on the left side is provided with a valve body lining installation groove (113), a valve body lining thrust surface (112), a spring installation groove (111), an outlet valve seat installation surface (114) and an outlet flange (115) in sequence; the left end surface of the valve body lining (14) is installed in close contact with the valve body lining thrust surface (112); a first spring (15) is installed in the spring installation groove (111) so that the outlet valve seat (2) is closely attached to the left side of the spherical valve core (5); A valve body inner liner mounting surface (116) and an inlet flange (117) are sequentially arranged in the fluoroplastic liner (11) located on the right side; The inner hole of the valve body lining (14) is provided with a large channel hole (141) and a small channel hole (142), wherein the large channel hole (141) is adapted to the large diameter outer circle of the outlet valve seat (2); the inlet valve seat (13) is installed in the small channel hole (142); a second spring (16) is arranged in the clamping groove between the inlet valve seat (13) and the right end surface of the valve body lining (14), so that the inlet valve seat (13) is tightly attached to the right side of the spherical valve core (5).

3. The energy-saving double-lined ceramic ball valve according to claim 2 is characterized in that: The valve stem (9) is provided with a blowout prevention step (91) which abuts against the bottom end surface of the shaft sleeve (10); the upper end surface of the shaft sleeve (10) abuts against the bottom end surface of the upper valve cover (3).

4. The energy-saving double-lined ceramic ball valve according to claim 3 is characterized in that: A square hole (52) is formed at the top of the spherical valve core (5), and the bottom of the valve stem (9) is inserted into the square hole (52); a round hole (51) is formed at the bottom of the spherical valve core (5), and the top of the fixed shaft (6) is inserted into the round hole (51).

5. The energy-saving double-lined ceramic ball valve according to claim 4 is characterized in that: The bottom of the upper countersunk hole (121) and the upper hole step (122), the top of the lower countersunk hole (131) and the lower hole step (132) are all coated with a fluoroplastic layer; and the gaps between the upper valve cover (3), the upper hole step (122) and the stuffing box are all coated with a fluoroplastic layer.

6. The energy-saving double-lined ceramic ball valve according to claim 5 is characterized in that: A first O-ring groove (143) is provided on the outer circle of the valve body lining (14), and a second O-ring groove (144) is provided on the small channel hole (142).

7. The energy-saving double-lined ceramic ball valve according to claim 6 is characterized in that: An O-ring mounting hole is arranged at the outlet of the fluoroplastic lining (11) on the left side.

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