A ball valve slow opening and closing auxiliary device

Abstract

The present invention relates to the field of power plant operation technology, and in particular to a ball valve slow opening and closing auxiliary device. The device includes: the working gear is a truncated cone with a gear shape, and the front and rear radii of the gear are different; the rear side of the working gear is connected to the adjusting nut by connecting rod welding, and the other side is equipped with a clamping bearing; the upper semicircular cover plate is semicircular in shape as a whole, and the front part is equipped with a gear that matches the working gear to form a male and female gear structure; there is a rectangular cavity in the middle of the upper semicircular cover plate; the rear side of the upper semicircular cover plate is connected to the upper part of the sliding groove; the lower semicircular cover plate corresponds to the upper semicircular cover plate as a whole and is connected by a nut; the front part of the lower semicircular cover plate is a smooth surface, and the working gear has no contact with the lower semicircular cover plate when moving forward and backward; there is a rectangular cavity in the middle of the lower semicircular cover plate; the rear side of the lower semicircular cover plate is connected to the lower part of the sliding groove. The present invention meets the operation requirements of the power plant, has the function of slowly adjusting the switch of the ball valve, and can also operate the valve quickly.

Description

Technical Field

[0001] The invention relates to the technical field of power plant operation, and in particular to a ball valve slow opening and closing auxiliary device. Background Art

[0002] In normal operation of power plants, many pipelines contain acid, alkali, flammable and explosive media, and for safety design, the media in these pipelines are usually manually switched on and off by ball valves for flow regulation. Due to the danger of the media, operators are required to operate accurately when adjusting the valves to avoid sudden opening and closing of the valves due to different strengths of each person, which affects the flow regulation and causes abnormal system operation or personal injury.

[0003] In order to reduce the transient state caused by the excessive operation amplitude of the ball valve due to the different strength of the operator and reduce the modification of the original equipment, it is necessary to add a slow opening and closing auxiliary device for the ball valve. The Chinese patent with publication number CN202144936 U discloses a ball valve fine-tuning device and a pan-tilt device. The device can achieve fine-tuning of the valve, but it cannot meet the needs of power plant operation. From the perspective of fast switching characteristics, the device cannot meet the characteristics of fast operation when fast cutoff is required. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a ball valve slow opening and closing auxiliary device that meets the operation requirements of the power plant, has the function of slowly adjusting the ball valve switch, and can also quickly operate the valve when rapid shut-off is required, thereby avoiding the influence of the auxiliary device on the operation of the valve body.

[0005] The present invention provides a ball valve slow opening and closing auxiliary device, comprising: a working gear, an adjusting nut, an upper semicircular cover plate, a lower semicircular cover plate, a sliding groove, and a clamping bearing;

[0006] The working gear is a truncated cone with a gear shape, and the front and rear radii of the gear are different;

[0007] The rear side of the working gear is welded to the adjusting nut through a connecting rod, and a clamping bearing is installed on the other side;

[0008] The upper semicircular cover plate is in a semicircular shape as a whole, with a gear on the front part matching with the working gear to form a male and female gear structure; there is a rectangular cavity in the middle part of the upper semicircular cover plate; the rear side of the upper semicircular cover plate is connected to the upper part of the sliding groove;

[0009] The lower semicircular cover plate corresponds to the upper semicircular cover plate as a whole and is connected by a nut; the front part of the lower semicircular cover plate is a smooth surface, and the working gear has no contact with the lower semicircular cover plate when moving forward and backward; there is a rectangular cavity in the middle of the lower semicircular cover plate; the rear side of the lower semicircular cover plate is connected to the lower part of the sliding groove.

[0010] Preferably, it also includes: a clamp, which includes two semicircular clamping grooves and fastening bolts, the two semicircular clamping grooves are fastened by the fastening bolts, and one clamping groove is connected to the outer side of the lower semicircular cover plate; a pipe rubber pad is arranged on the inner side of the clamping groove.

[0011] Preferably, the front and rear radii of the working gear have a ratio of 1:9 to 8:9 according to valves of different sizes.

[0012] Preferably, the adjusting nut is a cylindrical nut, and the circular surface of the adjusting nut has a thread to prevent slipping.

[0013] Preferably, the diameter of the adjusting nut is 3 cm to 15 cm.

[0014] Preferably, the inner diameter of the clamping bearing is 0.5 to 0.8 mm larger than the width of the valve handle. When performing the operation, the inner diameter of the clamping bearing is sleeved on the valve handle.

[0015] Preferably, the sliding groove is a semicircular flat channel with a width of 6 to 10 cm.

[0016] Preferably, the rectangular cavity of the lower semicircular cover plate corresponds to the rectangular cavity of the upper semicircular cover plate.

[0017] Preferably, the rectangular cavity of the upper semicircular cover plate has a width of 5 cm and a length greater than the radius of the gear by 5 cm.

[0018] Preferably, the rectangular cavity of the lower semicircular cover plate has a width of 5 cm and a length greater than the radius of the gear by 5 cm.

[0019] Compared with the prior art, the ball valve slow opening and closing auxiliary device of the present invention has the following beneficial effects:

[0020] 1) No need to modify existing pipelines and valves;

[0021] 2) Easy to install and highly adaptable;

[0022] 3) This device can withdraw quickly under the working conditions that require quick withdrawal, realizing the rapid action of the valve;

[0023] 4) The device is easy to operate and can realize flow control of the ball valve pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An overall schematic diagram showing a ball valve slow opening and closing auxiliary device according to an embodiment of the present invention;

[0025] Figure 2 An overall schematic diagram showing a ball valve slow opening and closing auxiliary device according to another embodiment of the present invention;

[0026] Figure 3A cross-sectional view showing the non-working state of the ball valve slow opening and closing auxiliary device;

[0027] Figure 4 A cross-sectional view showing the working state of the ball valve slow opening and closing auxiliary device;

[0028] Figure 5 A cross-sectional view showing the bearing of the ball valve slow opening and closing auxiliary device;

[0029] In the figure:

[0030] 1-clamp, 2-pipe rubber pad, 3-working gear, 4-adjusting nut, 5-upper semicircular cover plate, 6-lower semicircular cover plate, 7-sliding groove, 8-clamping bearing, 9-valve handle. DETAILED DESCRIPTION

[0031] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0032] The embodiment of the present invention discloses a ball valve slow opening and closing auxiliary device, such as Figure 1 As shown, it includes: a working gear 3, an adjusting nut 4, an upper semicircular cover plate 5, a lower semicircular cover plate 6, a sliding groove 7, and a clamping bearing 8;

[0033] The working gear 3 is a truncated cone with a gear shape, and the front and rear radii of the gear are different;

[0034] The rear side of the working gear 3 is welded to the adjusting nut 4 through a connecting rod, and a clamping bearing 8 is installed on the other side;

[0035] The upper semicircular cover plate 5 is in a semicircular shape as a whole, with a gear on the front part matching with the working gear 3 to form a male and female gear structure; a rectangular cavity is provided in the middle of the upper semicircular cover plate 5; the rear side of the upper semicircular cover plate 5 is connected to the upper part of the sliding groove 7;

[0036] The lower semicircular cover plate 6 corresponds to the upper semicircular cover plate 5 as a whole and is connected by a nut; the front part of the lower semicircular cover plate 6 is a smooth surface, and the working gear 3 has no contact with the lower semicircular cover plate 6 when moving forward and backward; there is a rectangular cavity in the middle of the lower semicircular cover plate 6; the rear side of the lower semicircular cover plate 6 is connected to the lower part of the sliding groove 7.

[0037] The ball valve slow opening and closing auxiliary device of the present invention, after being connected to the ball valve handle, can manipulate the ball valve handle to rotate to complete the fine adjustment function, and is suitable for pipelines of high-risk media in power plants. In particular, for ball valves without fine adjustment function, fine adjustment can be completed with the device of the present invention without the need for modification of the original device.

[0038] like Figure 2 and Figure 3As shown, preferably, the present invention also includes: a clamp 1, the clamp 1 includes two semicircular clamping grooves and fastening bolts, the two semicircular clamping grooves are fastened by fastening bolts, the size of the fastening bolts is customized according to the pipe diameter, one clamping groove is connected to the outer side of the lower semicircular cover plate 6; a pipe rubber pad 2 is arranged on the inner side of the clamping groove.

[0039] The function of the clamp 1 is to cooperate with the pipe rubber pad 2 to complete the installation of the device. The pipe rubber pad 2 is made of rubber material, which can prevent the pipe from being worn and the device from sliding due to the action of force.

[0040] The working gear 3 is a power transmission device of the device, and is a truncated cone with a gear shape. The front and rear radii of the working gear 3 are preferably 1:9 to 8:9 according to valves of different sizes.

[0041] The gear size of the working gear 3 is customized according to the need of adjustment accuracy. If the required accuracy is large, the number of gears will increase; if the adjustment accuracy requirement is not large and the adjustment speed requirement is large, the number of gears will decrease. The number of gears is selected according to the debugging results.

[0042] The rear side of the working gear 3 is connected to the adjusting nut 4 by welding through a connecting rod, and a clamping bearing 8 is installed on the other side.

[0043] The adjusting nut 4 is a cylindrical nut, and the circular surface has a threaded anti-slip surface. The diameter of the adjusting nut 4 is preferably 3 cm to 15 cm.

[0044] The clamping bearing 8 is a power conversion device, and the inner diameter of the clamping bearing 8 is 0.5 to 0.8 mm larger than the width of the valve handle 9. Figure 3 and 4 As shown, during operation, the inner diameter of the clamping bearing 8 is sleeved on the valve handle 9.

[0045] The upper semicircular cover plate 5 is semicircular in shape as a whole, with a gear on the front that matches the working gear 3 to form a male and female gear structure; there is a rectangular cavity in the middle of the upper semicircular cover plate 5; the rear side of the upper semicircular cover plate 5 is connected to the upper part of the sliding groove 7; preferably, the rectangular cavity of the upper semicircular cover plate 5 is 5 cm wide and the length is greater than the gear radius of 5 cm.

[0046] The lower semicircular cover plate 6 corresponds to the upper semicircular cover plate 5 as a whole and is connected by a nut; the front part of the lower semicircular cover plate 6 is a smooth surface, and the working gear 3 does not contact the lower semicircular cover plate 6 when moving forward and backward; there is a rectangular cavity in the middle of the lower semicircular cover plate 6; the rear side of the lower semicircular cover plate 6 is connected to the lower part of the sliding groove 7. Preferably, the rectangular cavity of the lower semicircular cover plate 6 has a width of 5 cm and a length greater than the gear radius of 5 cm.

[0047] Preferably, the rectangular cavity of the lower semicircular cover plate 6 corresponds to the rectangular cavity of the upper semicircular cover plate 5 .

[0048] The sliding groove 7 is used to fix the connecting rod between the working gear 3 and the adjusting nut 4. When the adjusting nut 4 works, the sliding groove 7 can fix the connecting rod between the working gear 3 and the adjusting nut 4 to make a semicircular motion. The sliding groove 7 is a semicircular flat channel with a width of preferably 6 to 10 cm.

[0049] The pipe rubber pad 2 of the device is preferably made of rubber; the clamping bearing 8 is preferably made of steel, and the remaining parts are preferably made of stainless steel.

[0050] After the installation is completed, when the valve needs fine-tuning, push in the operating knob, the rear bearing is inserted into the handle, and the knob is rotated slowly to complete the slow operation of the valve; when the valve needs to be opened and closed quickly, pull the knob back, exit the operating gear, and manually operate the valve to achieve fast operation of the valve.

[0051] The technical solution of the present invention comprises the following steps:

[0052] Step 1: Check that the clamp 1 and pipe gasket 2 are fully installed without tilting or looseness.

[0053] Step 2: Turn the adjusting nut 4 until it is in a straight line with the valve handle 9.

[0054] Step 3: Push the adjusting nut 4 inward to drive the working gear 3 to move inward, so that the clamping bearing 8 at the rear of the working gear 3 moves forward, and finally the valve handle 9 is stuck into the inner groove of the clamping bearing 8.

[0055] Step 4: Rotate the adjusting nut 4 clockwise or counterclockwise according to the instruction, so that the adjusting nut can slowly adjust the opening and closing state of the valve under the restriction of the sliding groove 7.

[0056] Step 5: After the adjustment is completed, pull back the adjusting nut 4 to drive the working gear 3 to move backward, so that the clamping bearing 8 at the rear of the working gear 3 moves backward, and finally the valve handle 9 withdraws from the inner groove of the clamping bearing 8.

[0057] Step 6: When an emergency occurs and the valve needs to be quickly operated, quickly execute the above step 5, and then manually operate the valve handle 9 to achieve rapid adjustment of the valve.

[0058] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0059] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ball valve slow opening and closing auxiliary device, characterized in that: include: Working gear (3), adjusting nut (4), upper semicircular cover plate (5), lower semicircular cover plate (6), sliding groove (7), clamping bearing (8); The working gear (3) is a truncated cone with a gear shape, and the front and rear radii of the gear are different; The rear side of the working gear (3) is welded to the adjusting nut (4) via a connecting rod, and a clamping bearing (8) is installed on the other side; The upper semicircular cover plate (5) is in a semicircular shape as a whole, and has a gear on the front portion that matches the working gear (3) to form a male and female gear structure; a rectangular cavity is provided in the middle portion of the upper semicircular cover plate (5); the rear side of the upper semicircular cover plate (5) is connected to the upper portion of the sliding groove (7); The lower semicircular cover plate (6) corresponds to the upper semicircular cover plate (5) as a whole and is connected via a nut; the front portion of the lower semicircular cover plate (6) is a smooth surface, and the working gear (3) does not contact the lower semicircular cover plate (6) when moving forward and backward; a rectangular cavity is provided in the middle portion of the lower semicircular cover plate (6); the rear side of the lower semicircular cover plate (6) is connected to the lower portion of the sliding groove (7); The inner diameter of the clamping bearing (8) is 0.5-0.8 mm larger than the width of the valve handle (9). When the operation is performed, the inner diameter of the clamping bearing (8) is sleeved on the valve handle (9).

2. The ball valve slow opening and closing auxiliary device according to claim 1, characterized in that: Also includes: A clamp (1), the clamp (1) comprising two semicircular clamping grooves and fastening bolts, the two semicircular clamping grooves being fastened by the fastening bolts, one clamping groove being connected to the outer side of a lower semicircular cover plate (6); a pipe rubber pad (2) is arranged on the inner side of the clamping groove.

3. The ball valve slow opening and closing auxiliary device according to claim 2, characterized in that: The front and rear radii of the working gear (3) have a ratio of 1:9 to 8:9 depending on the valve size.

4. The ball valve slow opening and closing auxiliary device according to claim 3, characterized in that: The adjusting nut (4) is a cylindrical nut, and the circular surface of the adjusting nut (4) has a thread to prevent slipping.

5. The ball valve slow opening and closing auxiliary device according to claim 1, characterized in that: The diameter of the adjusting nut (4) is 3 cm to 15 cm.

6. The ball valve slow opening and closing auxiliary device according to claim 1, characterized in that: The sliding groove (7) is a semicircular flat channel with a width of 6 to 10 cm.

7. The ball valve slow opening and closing auxiliary device according to claim 1, characterized in that: The rectangular cavity of the lower semicircular cover plate (6) corresponds to the rectangular cavity of the upper semicircular cover plate (5).

8. The ball valve slow opening and closing auxiliary device according to claim 1, characterized in that: The rectangular cavity of the upper semicircular cover plate (5) has a width of 5 cm and a length which is greater than the radius of the gear by 5 cm.

9. The ball valve slow opening and closing auxiliary device according to claim 1, characterized in that: The rectangular cavity of the lower semicircular cover plate (6) has a width of 5 cm and a length greater than the radius of the gear by 5 cm.

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