An anti-static structure and method for a valve

Abstract

The present invention discloses an anti-static structure and method for a valve. The anti-static structure of the valve includes a conductive component, a rotating grip, a central rod, a steel ball, a valve body, and a valve ball. A valve ball is arranged below the central rod, and the steel ball is arranged between the central rod and the valve ball. The conductive component includes a pressing block, a rotating body, and a spring. A groove is arranged at the lower part of the pressing block, and a protrusion is arranged at the upper part of the central rod. The groove and the protrusion are in conformity. When the groove and the protrusion are tightly fitted, the static electricity of the central rod is conducted to the conductive component. A connecting part is arranged at the upper part of the valve body, a counterbore is arranged at the lower part of the rotating body, a sliding groove is arranged on the inner wall of the counterbore, and a plurality of balls are installed in the sliding groove. The rotating body is rotationally connected to the connecting part through the balls, and the balls are used to realize the rotation of the rotating body and the connecting part and conduct the static electricity of the conductive component to the valve body. The anti-static structure of the present invention is convenient to install, does not need to open holes on the valve stem, and does not affect the strength of the valve stem.

Description

Technical Field

[0001] The present invention relates to the technical field of valve-related equipment, and particularly relates to an anti-static structure and method for a valve. Background Art

[0002] Static electricity is very common in life. As a conductor, the human body also carries static electricity. When inadvertently touching a conductor, one is often suddenly shocked by electricity. Although being shocked by static electricity usually causes no harm in most cases, in special occasions, static electricity must be strictly eliminated.

[0003] On page 23 of API 6D - 2014, "5.23 Anti-static device" stipulates that: "Soft-sealed ball valves, plug valves and gate valves shall be equipped with anti-static devices." This is because static electricity will be generated when different materials rub or come into contact with each other. When a soft-sealed plastic valve seat (PTFE, PPL, NYLON, etc.) rubs against a sphere (usually metal), static electric sparks are likely to be generated. If the valve is used in a pipeline for transporting flammable and explosive media, then the static electric sparks are very likely to cause the medium to burn or explode.

[0004] Normally, the static electricity on the valve stem is conducted to the valve body, and then the valve body is grounded to conduct the static electricity to the ground for elimination. Currently, most ball valves use an anti-static device composed of a spring and a steel ball (hereinafter referred to as "static electricity spring group"). Usually, there are two static electricity spring groups in a ball valve. One group connects the ball core to the valve stem to conduct the static electricity generated on the ball core to the valve stem; the other group connects the valve stem to the valve body to conduct the static electricity from the valve stem to the valve body, and the valve body is grounded. This kind of static electricity spring group needs to open holes on the valve stem, which causes a certain damage to the strength of the valve stem. At the same time, the installation time is relatively long, and the spring has a certain service life. After long-term use, the elastic force decreases, the steel ball and the valve body cannot be in close contact, and the anti-static effect of the valve will also be weakened, and the spring is not convenient to replace. Summary of the Invention

[0005] In order to solve the problem that the existing "static electricity spring group" anti-static device needs to open holes on the valve stem during installation, and this destructive installation method will affect the strength of the valve stem, our company has designed an anti-static structure and method for a valve, which does not require destructive operations on the valve stem during installation.

[0006] The technical solution of the present invention is as follows:

[0007] An anti-static structure for a valve, comprising a conductive component, a rotating grip, a central rod, a steel ball, a valve body and a valve ball; the rotating grip is above the conductive component, the central rod is below the conductive component, the central rod is arranged in the valve body, a valve ball is arranged below the central rod, and the steel ball is arranged between the central rod and the valve ball, and the steel ball is used to conduct the static electricity of the valve ball to the central rod.

[0008] The conductive component includes a pressing block, a rotating body and a spring. The rotating grip is connected to the pressing block by a screw. A fixing rod is provided on the pressing block, and a limiting groove is provided on the rotating body. The fixing rod cooperates with the limiting groove. A groove is provided at the lower part of the pressing block, and a protrusion is provided at the upper part of the central rod. The groove coincides with the protrusion. When the groove and the protrusion are closely fitted, the static electricity of the central rod is conducted to the conductive component.

[0009] A connecting part is provided at the upper part of the valve body. A counterbore is provided at the lower part of the rotating body. A sliding groove is provided on the inner wall of the counterbore. A plurality of balls are installed in the sliding groove. The rotating body is rotatably connected to the connecting part through the balls. The balls are used to realize the rotation of the rotating body and the connecting part and conduct the static electricity of the conductive component to the valve body. The spring is arranged between the pressing block and the rotating body.

[0010] In a preferred technical solution, fixing unit groups are provided on the pressing block and the rotating body. One fixing unit group includes two circular ring stoppers, which are respectively arranged on the pressing block and the rotating body. The spring is arranged in the fixing unit group.

[0011] In a preferred technical solution, a plurality of fixing unit groups are provided, and the plurality of fixing unit groups are evenly and equidistantly distributed in a circular shape around the center of the pressing block.

[0012] In a preferred technical solution, the protrusion is in the shape of a spur gear.

[0013] In a preferred technical solution, two or four fixing rods are provided, the number of limiting grooves is the same as that of the fixing rods, and the positions of the fixing rods and the limiting grooves correspond one by one.

[0014] In a preferred technical solution, a sealing ring is provided at the lower part of the central rod.

[0015] In a preferred technical solution, a dust-proof ring is provided in the middle part of the central rod.

[0016] A method for using a valve, using the anti-static structure of any one of the valves in claims 1-7, includes the following:

[0017] The rotating grip is pressed down, and the rotating grip drives the pressing block to move downward together, so that the pressing block moves downward against the elastic force of the spring;

[0018] During the downward movement of the pressing block, the groove at the lower part of the pressing block and the protrusion at the upper part of the central rod are gradually engaged together;

[0019] After the groove and the protrusion are engaged, the valve ball, the steel ball, the central rod, the pressing block, the rotating body, the ball and the valve body form a discharge path. The static electricity generated on the valve ball can be discharged through the discharge path, playing an anti-static role;

[0020] Rotating the grip can open or close the valve: Rotating the grip drives the pressing block, the central rod, and the valve ball to rotate, which serves to open or close the valve.

[0021] Release the pressure on the rotating grip, the pressing block disengages from the central rod, and the pressing block returns to its original position under the elastic force of the spring.

[0022] The beneficial effects of the present invention are:

[0023] In the present invention, by arranging a steel ball between the central rod and the valve ball, the static electricity of the valve ball is conducted to the central rod. A conductive component is arranged above the central rod, and the conductive component is connected to the valve body and separated from the central rod. During use, by pressing the rotating grip, the conductive component is connected to the central rod, and the static electricity on the central rod is transmitted to the valve body through the conductive component. The anti-static structure of the present invention is easy to install, does not require drilling holes in the valve stem, and does not affect the strength of the valve stem; the spring is arranged outside, which is convenient for replacement when the elastic force of the spring is insufficient, and the operation is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 is a cross-sectional view of the present invention;

[0025] Attached Figure 2 is a schematic structural view of the rotating body of the present invention;

[0026] Attached Figure 3 is a schematic structural view of the pressing block of the present invention;

[0027] Attached Figure 4 is a schematic structural view of the central rod of the present invention.

[0028] In the figure: 100 - pressing block, 101 - fixing rod, 102 - groove, 103 - spring, 104 - ring-shaped stop block, 200 - rotating body, 201 - limiting groove, 202 - counterbore, 203 - sliding groove, 204 - ball, 300 - central rod, 301 - steel ball, 302 - protrusion, 303 - sealing ring, 304 - dust-proof ring, 400 - rotating grip, 401 - screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will combine the drawings in the embodiments of the present invention to describe the specific embodiments of the present invention in detail:

[0030] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] An anti-static structure of a valve, comprising a conductive component, a rotating grip 400, a central rod 300, a steel ball 301, a valve body and a valve ball; the rotating grip 400 is above the conductive component, the central rod 300 is below the conductive component, the central rod 300 is arranged in the valve body, a valve ball is arranged below the central rod 300, and the steel ball 301 is arranged between the central rod 300 and the valve ball, and the steel ball 301 is used to conduct the static electricity of the valve ball to the central rod 300.

[0034] The conductive component includes a pressing block 100, a rotating body 200 and a spring 103. The rotating grip 400 is connected to the pressing block 100 by a screw 401. A fixing rod 101 is arranged on the pressing block 100, a limiting groove 201 is arranged on the rotating body 200, and the fixing rod 101 cooperates with the limiting groove 201; a groove 102 is arranged at the lower part of the pressing block 100, a protrusion 302 is arranged at the upper part of the central rod 300, and the groove 102 coincides with the protrusion 302. When the groove 102 and the protrusion 302 are in close fit, the static electricity of the central rod 300 is conducted to the conductive component.

[0035] A connecting part is arranged at the upper part of the valve body. A counterbore 202 is arranged at the lower part of the rotating body 200. A sliding groove 203 is arranged on the inner wall of the counterbore 202. A plurality of balls 204 are installed in the sliding groove 203. The rotating body 200 is rotationally connected to the connecting part through the balls 204. The balls 204 are used to realize the rotation of the rotating body 200 and the connecting part and conduct the static electricity of the conductive component to the valve body; the spring 103 is arranged between the pressing block 100 and the rotating body 200.

[0036] The working principle of the present invention is as follows: the steel ball 301 conducts the static electricity from the valve ball to the central rod 300. After pressing the rotating grip 400, the pressing block 100 moves downward synchronously. The groove 102 and the protrusion 302 are in close fit, and the static electricity is conducted from the central rod 300 to the pressing block 100. Then the static electricity is conducted to the rotating body 200 through the fixing rod 101, and then conducted from the rotating body to the valve body through the balls 204. The valve body is grounded, and the static electricity is then conducted from the valve body to the ground, realizing the anti-static of the ball valve.

[0037] Embodiment 2

[0038] In this embodiment, a fixed unit group is provided on the pressing block 100 and the rotating body 200. One fixed unit group includes two circular ring stoppers 104, and the two circular ring stoppers 104 are respectively arranged on the pressing block 100 and the rotating body 200. The spring 103 is arranged in the fixed unit group.

[0039] The circular ring stopper 104 limits the position of the spring 103, preventing the spring 103 from ejecting out in all directions when being squeezed, avoiding harm to the operator, and protecting the integrity of the product at the same time.

[0040] Embodiment Three

[0041] In this embodiment, several fixed unit groups are provided, and the several fixed unit groups are evenly and equidistantly distributed in a circular ring shape around the center of the pressing block 100.

[0042] The purpose of evenly arranging several fixed unit groups is to increase the number of springs 103, so that the supporting force of the springs 103 on the pressing block 100 is large enough. At the same time, in order to disperse the pressure during pressing, reduce the pressure received by a single spring 103, and extend the service life of the spring 103 and the use time of the anti-static structure.

[0043] Embodiment Four

[0044] In this embodiment, as Figure 4 shown, the protrusion 302 is in the shape of a spur gear. The groove 102 fits with the protrusion 302, so the shape of the groove 302 is the same spur gear shape as the protrusion 302. When the groove 102 and the protrusion 302 are tightly fitted, it is equivalent to a pair of spur gears meshing together, and the efficiency of transmitting rotational motion is higher. At the same time, spur gear transmission also has the advantages of reliable operation and long service life, ensuring the stability of opening or closing the valve.

[0045] In another feasible embodiment, in order to make the cooperation between the groove 102 and the protrusion 302 more convenient and fast, the protrusion 302 is designed in the shape of a straight bevel gear, and the corresponding shape of the groove 302 is the same straight bevel gear shape.

[0046] Embodiment Five

[0047] In this embodiment, two or four fixing rods 101 are provided, the number of limiting grooves 201 is the same as that of the fixing rods 101, and the fixing rods 101 and the limiting grooves 201 are in one-to-one correspondence in position. The two or four fixing rods 101 are arranged on the pressing block 100 in an axisymmetric layout, and such an arrangement makes the structure of the pressing block 100 look symmetrically beautiful.

[0048] When operating the anti-static structure, press the rotating grip 400 to drive the pressing block 100 to move downward synchronously. Eventually, the fixed rod 101 contacts the bottom surface of the limiting groove 201, and the protrusion 302 fits tightly with the groove 102. At this time, the static electricity of the valve ball is conducted to the valve body in sequence according to the central rod 300, the pressing block 100, and the rotating body 200.

[0049] Embodiment Six

[0050] In this embodiment, a sealing ring 303 is provided at the lower part of the central rod 300. The sealing ring 303 can be made of rubber. The function of the sealing ring 303 is to enhance the tightness of the ball valve, prevent the medium in the ball valve from leaking out through the gap between the central rod 300 and the valve body, which affects the use of the ball valve. At the same time, the leakage of the medium may cause the anti-static structure to malfunction, which will cause harm to the ball valve, pipeline, and operator.

[0051] The sealing ring 303 is arranged between the central rod 300 and the valve body, preventing direct contact between the central rod 300 and the valve body from generating noise during rotation, and at the same time avoiding wear caused by contact between the central rod 300 and the valve body during rotation, which has an adverse effect on the service life of the central rod 300.

[0052] Embodiment Seven

[0053] In this embodiment, a dust-proof ring 304 is provided in the middle of the central rod 300. The dust-proof ring 304 can be made of silica gel or rubber.

[0054] The dust-proof ring 304 is used to prevent foreign dust particles and other sundries from falling into the ball valve and having an adverse effect on the use of the ball valve. The outer wall of the dust-proof ring 304 contacts the valve body, and there is a gap of 1-2 mm between the inner wall of the dust-proof ring 304 and the central rod 300. The existence of the gap is to prevent the dust-proof ring 304 from directly contacting the central rod 300. Because the materials of the dust-proof ring 304 and the central rod 300 are different, direct contact between the dust-proof ring 304 and the central rod 300 will cause the dust-proof ring 304 to hinder the rotation of the central rod 300 when the central rod 300 rotates, thus affecting the opening and closing of the ball valve.

[0055] Embodiment Eight

[0056] A method for using a valve, using the anti-static structure of any one of the valves in claims 1-7, including the following content:

[0057] The rotating grip 400 is pressed down, and the rotating grip 400 drives the pressing block 100 to move downward together, causing the pressing block 100 to move downward against the elastic force of the spring 103;

[0058] During the downward movement of the pressing block 100, the groove 102 at the lower part of the pressing block 100 and the protrusion 302 at the upper part of the central rod 300 are gradually engaged. During the process of pressing down and rotating the rotating grip 400, adjust the direction of the rotating grip 400 left and right so that the top of the protrusion 302 (the protrusion is in the shape of a spur gear) fits with the bottom of the groove 102, and then stop adjusting the direction of the rotating grip 400 and directly press it down to make the protrusion 302 and the groove 102 fully cooperate;

[0059] After the groove 102 and the protrusion 302 are engaged, the valve ball, the steel ball 301, the central rod 300, the pressing block 100, the rotating body 200, the ball 204, and the valve body form a discharge path. The static electricity generated on the valve ball can be discharged through the discharge path, playing an anti-static role; [[ID=--]] [[ID=--]]

[0060] Rotating the rotating grip 400 can open or close the valve: Rotating the rotating grip 400 drives the pressing block 100, the central rod 300, and the valve ball to rotate, playing the role of opening or closing the valve;

[0061] Release the pressure on the rotating grip 400, and the pressing block 100 is disengaged from the central rod 300. The pressing block 100 returns to its original position under the elastic force of the spring 103.

[0062] During operation, if the rotating grip 400 is not pressed to make the groove 102 and the protrusion 302 fit tightly, rotating the rotating grip 400 cannot transmit the torque to the central rod 300. It is equivalent to that the rotating grip 400 is in an idling state at this time, and the operation of opening and closing the valve cannot be realized. Therefore, accidents caused by accidental touching by personnel are avoided. After pressing the rotating grip 400, the groove 102 and the protrusion 302 fit tightly, realizing the transfer of static electricity from the valve ball to the valve body. At this time, rotating the rotating grip 400 will not generate electric sparks. And after opening or closing the valve, release the rotating grip 400, and the rotating grip 400 will return to its original position under the elastic force of the spring 103. At this time, the groove 102 and the protrusion 302 are separated, and rotating the rotating grip 400, the rotating grip 400 enters the idling state again, realizing the safety protection of personnel, valves, and pipelines.

[0063] In the above specific embodiments, the technical solutions, the technical problems solved, and the beneficial effects of the present invention are further described in detail. It should be noted that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-static structure for a valve, characterized in that: It includes a conductive component, a rotating grip (400), a central rod (300), a steel ball (301), a valve body, and a valve ball; the rotating grip (400) is above the conductive component, the central rod (300) is below the conductive component, the central rod (300) is arranged in the valve body, the valve ball is arranged below the central rod (300), and the steel ball (301) is arranged between the central rod (300) and the valve ball, and the steel ball (301) is used to conduct the static electricity of the valve ball to the central rod (300); The conductive component includes a pressing block (100), a rotating body (200), and a spring (103). The rotating grip (400) is connected to the pressing block (100) by a screw (401). A fixing rod (101) is arranged on the pressing block (100), a limiting groove (201) is arranged on the rotating body (200), and the fixing rod (101) cooperates with the limiting groove (201); a groove (102) is arranged at the lower part of the pressing block (100), a protrusion (302) is arranged at the upper part of the central rod (300), the groove (102) coincides with the protrusion (302), and when the groove (102) and the protrusion (302) are closely fitted, the static electricity of the central rod (300) is conducted to the conductive component; A connecting part is arranged at the upper part of the valve body. A counterbore (202) is arranged at the lower part of the rotating body (200), a sliding groove (203) is arranged on the inner wall of the counterbore (202), several balls (204) are installed in the sliding groove (203), the rotating body (200) is rotatably connected to the connecting part through the balls (204), and the balls (204) are used to realize the rotation of the rotating body (200) and the connecting part and conduct the static electricity of the conductive component to the valve body; the spring (103) is arranged between the pressing block (100) and the rotating body (200).

2. The anti-static structure of a valve according to claim 1, characterized in that: Fixing unit groups are arranged on the pressing block (100) and the rotating body (200). One fixing unit group includes two circular ring stoppers (104), and the two circular ring stoppers (104) are respectively arranged on the pressing block (100) and the rotating body (200), and both ends of the spring (103) are arranged in the fixing unit group.

3. The anti-static structure of a valve according to claim 2, characterized in that: Several fixing unit groups are arranged, and the several fixing unit groups are evenly distributed in a circular ring shape around the center of the pressing block (100).

4. The anti-static structure of a valve according to claim 1, characterized in that: The protrusion (302) is in the shape of a spur gear.

5. The anti-static structure of a valve according to claim 1, characterized in that: Two or four fixing rods (101) are arranged, the number of the limiting grooves (201) is the same as that of the fixing rods (101), and the positions of the fixing rods (101) and the limiting grooves (201) correspond one by one.

6. The anti-static structure of a valve according to claim 1, characterized in that: A sealing ring (303) is arranged at the lower part of the central rod (300).

7. The anti-static structure of a valve according to claim 1, characterized in that: A dust-proof ring (304) is arranged in the middle of the central rod (300).

8. A method for using a valve, characterized in that: Using the anti-static structure of any one of the valves in claims 1-7, it includes the following content: The rotating grip (400) is pressed down, and the rotating grip (400) drives the pressing block (100) to move downward together, so that the pressing block (100) moves downward against the elastic force of the spring (103); During the downward movement of the pressing block (100), the groove (102) at the lower part of the pressing block (100) and the protrusion (302) at the upper part of the central rod (300) are gradually engaged together; After the groove (102) and the protrusion (302) are engaged, the valve ball, the steel ball (301), the center rod (300), the pressing block (100), the rotating body (200), the ball (204), and the valve body form a discharge path, and the static electricity generated on the valve ball can be discharged through the discharge path, playing an anti-static role; Rotating the grip (400) can open or close the valve: Rotating the grip (400) drives the pressing block (100), the center rod (300), and the valve ball to rotate, playing the role of opening or closing the valve; Releasing the pressure on the grip (400), the pressing block (100) disengages from the center rod (300), and the pressing block (100) returns to its original position under the elastic force of the spring (103).

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