Anti-rotation full-bore lifting plug valve

Abstract

The utility model discloses an anti-rotation full-bore lifting type plug valve which comprises a valve body, a bottom cover, an upper cover, a valve cavity, a flow channel, a plug body, a valve rod, a support, a hand wheel, a driving shaft and an upper valve rod and further comprises a cavity, an inner friction component and an inner driving component. The utility model has the following advantages and effects: the structure of the driving shaft which is fixed with the hand wheel and is used for transmission is improved, the inner friction component is arranged by arranging the cavity, and the inner friction component can be in tight contact with the inner wall of the driving shaft and generate friction resistance after being subjected to driving force, so that the driving shaft is prevented from continuously rotating, and the service life of the driving shaft is prolonged. The purpose of preventing external misoperation of the hand wheel is achieved, and actual use is more reliable and safer; in addition, an inner drive member is provided to provide a drive force for the friction blocking member.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-rotation full-diameter lifting plug valve. Background Art

[0002] A plug valve is a common valve used primarily to control the flow of fluids. It operates by rotating a plug to open and close the valve. Plug valves offer a simple structure, excellent sealing performance, and are suitable for a variety of operating conditions. A handwheel controls the rotation of the plug.

[0003] However, in actual use, the handwheel of traditional plug valves is prone to misoperation, resulting in accidental opening or closing of the flow channel, which may cause safety hazards and economic losses. Therefore, a more reliable structure is urgently needed to prevent misoperation and handwheel rotation. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-rotation full-diameter lifting plug valve to solve the problems raised in the background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] An anti-rotation full-bore lifting plug valve, comprising a valve body, a bottom cover fixedly provided at the bottom of the valve body, an upper cover fixedly provided at the top of the valve body, a valve cavity formed by cooperation between the valve body, a flow channel provided in the valve body, a plug body for controlling the opening or closing of the flow channel provided in the valve cavity, a valve stem fixedly provided at the upper end of the plug body, a bracket fixedly provided at the top of the upper cover, a hand wheel rotatably provided on the bracket, a drive shaft vertically extending into the interior of the bracket fixedly provided on the hand wheel, the outer circumference of the drive shaft having a thread; the valve stem is vertically arranged and extends upward, an upper valve stem fixedly provided at the upper end of the valve stem, the outer circumference of the upper valve stem having a thread, the upper valve stem can extend into the interior of the bracket and form a transmission with the drive shaft; the characteristics are:

[0007] The drive shaft has a cavity inside, and an internal friction member is provided in the cavity, which can tightly contact the inner wall of the drive shaft and generate friction resistance after receiving a driving force, so as to prevent the drive shaft from continuing to rotate;

[0008] An internal driving component for providing driving force for the internal friction component is arranged inside the bracket.

[0009] The further configuration is as follows: the internal friction member includes two rotating shafts fixed in the bracket, the two rotating shafts are simultaneously located in the cavity, a rigid rotating arm is rotatably provided on each of the two rotating shafts, and a damping friction section is fixedly provided on the outer side of each of the two rigid rotating arms, and the two damping friction sections can tightly contact the inner wall of the drive shaft and generate friction resistance to prevent the drive shaft from continuing to rotate;

[0010] A tension spring is fixedly arranged between the two rigid rotating arms, and the elastic force of the tension spring causes the two rigid rotating arms to have a tendency to retract inward.

[0011] The further configuration is as follows: the inner driving member includes a first inner shell, the first inner shell is located in the cavity, a horizontal first inner cavity is defined inside the first inner shell, and the left and right ends of the first inner cavity are open; two outward-expanding top blocks are provided in the first inner cavity, an inward-retracting spring is provided between the two outward-expanding top blocks, and the inward-retracting spring has a tendency to retract the two outward-expanding top blocks due to its own elastic force; outer resistance rings are fixedly provided at the left and right ends of the first inner cavity, which can respectively collide with the two outward-expanding top blocks to achieve the purpose of preventing them from falling off;

[0012] The upper ends of the two rigid rotating arms are fixed with access protrusions, and the two outer resistance rings are each provided with a first through-hole. The two access protrusions can respectively pass through the corresponding first through-holes and extend into the left and right ends of the first inner cavity, and respectively contact the two outward-expanded top blocks.

[0013] A further configuration is that at least one sealing ring is provided at the upper and lower ends of the two outwardly expanding top blocks.

[0014] A further configuration is that rubber contact blocks capable of contacting corresponding access protrusions are fixedly embedded on the outer sides of the two outward-expanding top blocks.

[0015] The further configuration is that: the inner driving component also includes a second inner shell, a liquid storage chamber and a second inner chamber are defined inside the second inner shell, the liquid storage chamber is located above the second inner chamber, and an inner hole is defined in the second inner shell to connect the liquid storage chamber and the second inner chamber; an extrusion push block is defined in the second inner chamber, the extrusion push block can slide horizontally in the second inner chamber, an extension section is fixedly defined on the left end of the extrusion push block, a second through-hole is defined on the left end of the second inner shell for the extension section to pass through the bracket to the left, and an active pressure block located outside the bracket is fixedly defined on the left end of the fixed extension section;

[0016] The right end of the second inner shell and the upper end of the first inner shell are connected through an inner tube; by pressing the active pressure block, the liquid can be pressed into the first inner cavity, providing a driving force for the two outward-expanding top blocks to expand outward.

[0017] A further configuration is that a return spring is squeezed between the right end of the extrusion push block and the right wall of the second inner cavity, and based on the elastic force of the return spring, the extrusion push block has a tendency to move leftward.

[0018] Further configuration is: a vertical locking hole is opened inside the active pressure block, and a vertical locking groove is opened inside the bracket; it also includes a locking shaft, which can be detachably inserted into the locking hole and the locking groove to achieve the purpose of locking the position of the active pressure block.

[0019] The utility model has the following beneficial effects:

[0020] 1. In this utility model, the drive shaft structure, which is fixed to the handwheel and used for transmission, is improved. By creating a cavity to accommodate an internal friction member, the internal friction member can tightly contact the inner wall of the drive shaft when subjected to driving force, generating frictional resistance to prevent the drive shaft from continuing to rotate. This prevents external misoperation of the handwheel, making actual use more reliable and safer. In addition, the internal drive member is provided to provide driving force for the friction resistance member.

[0021] 2. In the present invention, the two rigid rotating arms can rotate based on the corresponding rotating shafts, and the two damping friction sections are respectively fixed on the corresponding rigid rotating arms. The two damping friction sections can tightly contact the inner wall of the drive shaft and generate friction resistance to prevent the drive shaft from continuing to rotate; the tension spring can play a returning role.

[0022] 3. In the present invention, the first inner shell in the inner driving component serves as a carrier, and the two outward-expanding top blocks arranged therein can respectively contact the access protrusions on the two rigid rotating arms. Based on the outward expansion of the two outward-expanding top blocks, the two rigid rotating arms can be pushed to rotate outward, so that the two damping friction sections are tightly in contact with the inner wall of the drive shaft; the retracted spring can play a returning role.

[0023] 4. In the present invention, the sealing ring can improve the sealing performance.

[0024] 5. The provision of the rubber contact block in the present invention can reduce hard collisions and protect the access protrusions.

[0025] 6. In the present invention, the second inner shell serves as a carrier, and the extrusion push block inside it can push the liquid into the first inner cavity through the inner tube, providing driving force for the two outward-expanding top blocks to expand outward; the setting of the active pressure block makes it convenient for the operator to press to push the extrusion push block to the right; the liquid storage cavity provides flow space for the liquid.

[0026] 7. In the present invention, the return spring can play a returning role.

[0027] 8. In the present invention, the locking shaft can be inserted into the locking hole and the locking groove to achieve the purpose of locking the position of the active pressure block. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the internal structure of the embodiment;

[0029] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0030] Figure 3 for Figure 2 Enlarged view of middle part B;

[0031] Figure 4 for Figure 2 Enlarged view of the middle C section;

[0032] Figure 5 Schematic diagram of the external structure of the embodiment.

[0033] In the figure: 11, valve body; 12, bottom cover; 13, upper cover; 14, valve cavity; 15, flow channel; 16, plug body; 17, valve stem; 18, bracket; 19, upper valve stem; 21, handwheel; 22, drive shaft; 23, cavity; 31, rotating shaft; 32, rigid rotating arm; 33, damping friction section; 34, tension spring; 41, first inner shell; 42, first inner cavity; 43, outward expansion top block; 431, sealing ring ;44. Retraction spring;45. Outer resistance ring;451. First through-hole;46. Access protrusion;47. Rubber contact block;51. Second inner shell;52. Liquid storage chamber;53. Second inner chamber;54. Inner hole;55. Extrusion push block;56. Extension section;57. Second through-hole;58. Active pressure block;59. Retraction spring;61. Inner tube;71. Locking hole;72. Locking groove;73. Locking shaft. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below with reference to the accompanying drawings.

[0035] As attached Figures 1 to 5 As shown;

[0036] The present embodiment discloses an anti-rotation full-bore lifting plug valve, including a valve body 11, a bottom cover 12 is fixedly provided at the bottom of the valve body 11, an upper cover 13 is fixedly provided at the top of the valve body 11, a valve cavity 14 is formed between the valve body 11, a flow channel 15 is opened in the valve body 11, a plug body 16 for controlling the opening or closing of the flow channel 15 is provided in the valve cavity 14, a valve stem 17 is fixedly provided at the upper end of the plug body 16, a bracket 18 is fixedly provided on the top of the upper cover 13, a hand wheel 21 is rotatably provided on the bracket 18, a drive shaft 22 is fixedly provided on the hand wheel 21 and vertically extends into the interior of the bracket 18, and the outer periphery of the drive shaft 22 has a thread; the valve stem 17 is vertically arranged and extends upward, and an upper valve stem 19 is fixedly provided on the upper end of the valve stem 17, and the outer periphery of the upper valve stem 19 has a thread, and the upper valve stem 19 can extend into the interior of the bracket 18 and form a transmission with the drive shaft 22. The above structure is a conventional structure of a plug valve, belongs to the prior art, and will not be elaborated here.

[0037] The drive shaft 22 has a cavity 23 inside, and an internal friction member is provided in the cavity 23. The internal friction member can tightly contact the inner wall of the drive shaft 22 and generate friction resistance to prevent the drive shaft 22 from continuing to rotate after receiving a driving force.

[0038] An inner driving member for providing driving force to the inner friction member is provided inside the bracket 18 .

[0039] The internal friction member includes two rotating shafts 31 fixed in the bracket 18. The two rotating shafts 31 are simultaneously located in the cavity 23. Rigid rotating arms 32 are rotatably provided on the two rotating shafts 31. Damping friction sections 33 are fixedly provided on the outer sides of the two rigid rotating arms 32. The two damping friction sections 33 can tightly contact the inner wall of the drive shaft 22 and generate friction resistance to prevent the drive shaft 22 from continuing to rotate.

[0040] A tension spring 34 is fixedly provided between the two rigid rotating arms 32 , and the elastic force of the tension spring 34 causes the two rigid rotating arms 32 to have a tendency to retract inward.

[0041] Among them, the inner driving component includes a first inner shell 41, which is located in the cavity 23. A horizontal first inner cavity 42 is opened inside the first inner shell 41, and the left and right ends of the first inner cavity 42 are open; two outward-expanding top blocks 43 are provided in the first inner cavity 42, and an inward-retracting spring 44 is provided between the two outward-expanding top blocks 43. The inward-retracting spring 44 makes the two outward-expanding top blocks 43 have an inward-retracting tendency based on its own elastic force; the left and right ends of the first inner cavity 42 are fixedly provided with outer resistance rings 45 that can collide with the two outward-expanding top blocks 43 respectively to achieve the purpose of preventing them from falling off;

[0042] Access protrusions 46 are fixedly provided at the upper ends of the two rigid rotating arms 32, and first through-holes 451 are opened in the two outer resistance rings 45. The two access protrusions 46 can respectively pass through the corresponding first through-holes 451 and extend into the left and right ends of the first inner cavity 42, and respectively contact the two outward-expanded top blocks 43.

[0043] Therein, two sealing rings 431 are provided at the upper and lower ends of the two outwardly expanded top blocks 43 .

[0044] The outer sides of the two outward-expanding top blocks 43 are fixedly embedded with rubber contact blocks 47 that can contact the corresponding access protrusions 46 .

[0045] Among them, the inner driving component also includes a second inner shell 51, and a liquid storage chamber 52 and a second inner chamber 53 are opened inside the second inner shell 51. The liquid storage chamber 52 is located above the second inner chamber 53, and an inner hole 54 is opened in the second inner shell 51 to connect the liquid storage chamber 52 and the second inner chamber 53; an extrusion push block 55 is provided in the second inner chamber 53, and the extrusion push block 55 can slide horizontally in the second inner chamber 53. An extension section 56 is fixedly provided at the left end of the extrusion push block 55, and a second through hole 57 is opened at the left end of the second inner shell 51 for the extension section 56 to pass through the bracket 18 to the left, and an active pressure block 58 located outside the bracket 18 is fixedly provided at the left end of the fixed extension section 56;

[0046] The right end of the second inner shell 51 and the upper end of the first inner shell 41 are connected through the inner tube 61; by pressing the active pressure block 58, the liquid can be pressed into the first inner cavity 42, providing driving force for the two outward-expanding top blocks 43 to expand outward.

[0047] Therein, a retraction spring 59 is squeezed between the right end of the extrusion push block 55 and the right wall of the second inner cavity 53 . Based on the elastic force of the retraction spring 59 , the extrusion push block 55 has a tendency to move leftward.

[0048] Among them, a vertical locking hole 71 is opened inside the active pressure block 58, so a vertical locking groove 72 is opened inside the bracket 18; it also includes a locking shaft 73, which can be detachably inserted into the locking hole 71 and the locking groove 72 to achieve the purpose of locking the position of the active pressure block 58.

[0049] The working principle of this embodiment is:

[0050] Under normal circumstances:

[0051] 1. The two rigid rotating arms 32 have a tendency to retract due to the elastic force of the tension spring 34 , and the two damping friction sections 33 will not contact the inner wall of the drive shaft 22 .

[0052] 2. The two outward-expanding top blocks 43 have an inward-contracting tendency due to the elastic force of the inward-contracting spring 44 , and the two outward-expanding top blocks 43 will not contact the access protrusion 46 of the rigid rotating arm 32 .

[0053] 3. The extrusion push block 55 has a tendency to move leftward due to the elastic force of the return spring 59 , and the second inner cavity 53 and the liquid storage cavity 52 remain in communication.

[0054] To prevent the hand wheel 21 from rotating:

[0055] 1. The operator applies force to press the active pressing block 58, which moves rightward and drives the squeezing push block 55 to move rightward. The squeezing push block 55 can push the liquid into the first inner cavity 42 through the inner tube 61, providing driving force for the two outward-expanding top blocks 43 to expand outward.

[0056] 2. The two outward-expanding top blocks 43 expand outward, pushing the two rigid rotating arms 32 to rotate outward, so that the two damping friction sections 33 tightly contact the inner wall of the drive shaft 22 to prevent the drive shaft 22 from continuing to rotate, thereby preventing the hand wheel 21 from rotating.

[0057] 3. Insert the locking shaft 73 into the locking hole 71 and the locking groove 72 to lock the position of the active pressure block 58.

[0058] 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. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An anti-rotation full-bore lifting plug valve, comprising a valve body (11), a bottom cover (12) fixedly provided at the bottom of the valve body (11), an upper cover (13) fixedly provided at the top of the valve body (11), a valve cavity (14) formed by cooperation among the valve body (11), the bottom cover (12) and the upper cover (13), a flow channel (15) being provided in the valve body (11), a plug body (16) for controlling the opening or closing of the flow channel (15) being provided in the valve cavity (14), a valve stem (17) fixedly provided at the upper end of the plug body (16), and the upper cover (13) being fixedly provided. 3) A bracket (18) is fixedly provided on the top, a hand wheel (21) is rotatably provided on the bracket (18), a drive shaft (22) is fixedly provided on the hand wheel (21) and extends vertically into the interior of the bracket (18), and the outer periphery of the drive shaft (22) has a thread; the valve stem (17) is vertically provided and extends upward, an upper valve stem (19) is fixedly provided on the upper end of the valve stem (17), and the outer periphery of the upper valve stem (19) has a thread, and the upper valve stem (19) can extend into the interior of the bracket (18) and form a transmission with the drive shaft (22); the characteristics are: The drive shaft (22) has a cavity (23) inside, and an internal friction member is provided in the cavity (23) which can tightly contact the inner wall of the drive shaft (22) and generate friction resistance after receiving a driving force to prevent the drive shaft (22) from continuing to rotate; An internal driving component for providing driving force for the internal friction component is arranged inside the bracket (18).

2. The anti-rotation full-bore lifting plug valve according to claim 1, characterized in that: The internal friction component includes two rotating shafts (31) fixed in the bracket (18), the two rotating shafts (31) are simultaneously located in the cavity (23), and hard rotating arms (32) are rotatably provided on the two rotating shafts (31), and damping friction sections (33) are fixedly provided on the outer sides of the two hard rotating arms (32). The two damping friction sections (33) can tightly contact the inner wall of the drive shaft (22) and generate friction resistance to prevent the drive shaft (22) from continuing to rotate; a tension spring (34) is fixedly provided between the two hard rotating arms (32), and based on the elastic force of the tension spring (34), the two hard rotating arms (32) have a tendency to retract inward.

3. The anti-rotation full-bore lifting plug valve according to claim 2, characterized in that: The inner driving component includes a first inner shell (41), the first inner shell (41) is located in the cavity (23), a horizontal first inner cavity (42) is provided inside the first inner shell (41), and the left and right ends of the first inner cavity (42) are open; two outward-expanding top blocks (43) are provided in the first inner cavity (42), and a retraction spring (44) is provided between the two outward-expanding top blocks (43), and the retraction spring (44) makes the two outward-expanding top blocks (43) have a tendency to retract based on its own elastic force; outer resistance rings (45) are fixedly provided at the left and right ends of the first inner cavity (42) and can collide with the two outward-expanding top blocks (43) to achieve the purpose of preventing them from falling off; The upper ends of the two rigid rotating arms (32) are fixedly provided with access protrusions (46), and the two outer resistance rings (45) are both provided with first through-holes (451). The two access protrusions (46) can respectively pass through the corresponding first through-holes (451) and extend into the left and right ends of the first inner cavity (42), and respectively contact the two outward-expanded top blocks (43).

4. The anti-rotation full-bore lifting plug valve according to claim 3, characterized in that: At least one sealing ring (431) is provided at the upper and lower ends of the two outward-expanding top blocks (43).

5. The anti-rotation full-bore lifting plug valve according to claim 3, characterized in that: The outer sides of the two outward-expanding top blocks (43) are fixedly embedded with rubber contact blocks (47) capable of contacting the corresponding access protrusions (46).

6. The anti-rotation full-bore lifting plug valve according to claim 3, characterized in that: The inner driving component further comprises a second inner shell (51), wherein a liquid storage chamber (52) and a second inner chamber (53) are provided inside the second inner shell (51), wherein the liquid storage chamber (52) is located above the second inner chamber (53), and an inner hole (54) is provided in the second inner shell (51) for connecting the liquid storage chamber (52) and the second inner chamber (53); an extrusion push block (55) is provided in the second inner chamber (53), wherein the extrusion push block (55) can slide horizontally in the second inner chamber (53), and an extension section (56) is fixedly provided at the left end of the extrusion push block (55), and a second through hole (57) is provided at the left end of the second inner shell (51) for the extension section (56) to pass through the bracket (18) to the left, and an active pressure block (58) located outside the bracket (18) is fixedly provided at the left end of the fixed extension section (56); The right end of the second inner shell (51) and the upper end of the first inner shell (41) are connected through an inner tube (61); by pressing the active pressure block (58), the liquid can be pressed into the first inner cavity (42), providing a driving force for the two outward-expanding top blocks (43) to expand outward.

7. The anti-rotation full-bore lifting plug valve according to claim 6, characterized in that: A retraction spring (59) is squeezed between the right end of the extrusion push block (55) and the right wall of the second inner cavity (53). Based on the elastic force of the retraction spring (59), the extrusion push block (55) has a tendency to move leftward.

8. The anti-rotation full-bore lifting plug valve according to claim 6, characterized in that: The active pressure block (58) is provided with a vertical locking hole (71) therein, and the bracket (18) is provided with a vertical locking groove (72) therein; and further comprises a locking shaft (73), which can be detachably inserted into the locking hole (71) and the locking groove (72) to achieve the purpose of locking the position of the active pressure block (58).

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