Rubber dam valve control rod

Abstract

The utility model relates to a rubber dam valve control rod which comprises a hand wheel connecting device (7), a single-joint cross shaft universal joint (8), a first rotating rod (9), a second rotating rod (10), a positioning retaining device (11), an operating hand wheel (12), an unlocking handle (13), a connecting piece (14) and an anti-falling limiting device (15), the whole rubber dam valve control rod is of a telescopic structure, and inclination operation of the rubber dam valve control rod is allowed. The functions are complete, and the technical problems existing in the field are well solved.

Description

Technical Field

[0001] The present application relates to a rubber dam valve control rod, and belongs to the technical field of tools for operating rubber dam valves outside a well. Background Art

[0002] As a new type of river hydraulic structure, water-filled rubber dam has been rapidly developed in my country. By controlling the water pump and rubber dam valve to fill or release water into the rubber dam bag through the pipeline, the dam bag can be raised or lowered, thereby controlling the water level upstream of the river.

[0003] As shown in Figure 1, it is a schematic diagram of the structure of a typical existing rubber dam valve well. When operating the rubber dam valve, the operator opens the manhole cover 6 of the rubber dam valve well, enters the valve well from the manhole 5 at the wellhead, and enters the bottom of the valve well along the ladder 4 set on the inner wall of the well. The operator manually turns the rubber dam valve handwheel 3 to close or open the rubber dam valve 2.

[0004] The rubber dam valve well is usually more than 4 meters deep, which puts a lot of physical strain on the operators and poses a risk of falling and getting injured. The rubber dam valve well is located on the bank of the river, and water is easily accumulated in the well, making the operation of the rubber dam valve extremely troublesome. The rubber dam valve well is usually relatively hidden, and small animals such as rats and snakes may live in the well, causing inconvenience to the operation of the rubber dam valve. The rubber dam bag is a closed anaerobic environment, and toxic and harmful gases are easily produced inside. The rubber dam valve is directly connected to the rubber dam bag through pipe 1, and there is a hidden danger of toxic and harmful gases entering the rubber dam valve well.

[0005] To solve the above problems, some rubber dam maintenance units will temporarily distribute operating rods to maintenance personnel. The operating rod is a rigid rod structure as a whole and is relatively bulky. It includes a circular hollow tube of fixed length. Three cylindrical columns evenly distributed along the horizontal circumference are set at the lower end of the hollow tube. The columns are welded with steel bars, and a circular handwheel is set at the upper end of the hollow tube. During operation, the maintenance personnel will first carry the operating rod to the side of the rubber dam valve well, and then stand it upright in the valve well, and align the column at the lower end of the operating rod with the gap on the handwheel inserted into the rubber dam valve, and then turn the handwheel at the upper end of the operating rod to rotate the handwheel of the rubber dam valve, thereby realizing the control operation of the rubber dam valve on the well. After the operation is completed, the operating rod is taken out from the valve well and stored, and the well cover is covered to complete the operation task.

[0006] Because the rubber dam valve well is relatively deep and the operating lever is very heavy, it is not easy to align the column at the lower end of the operating lever with the gap of the rubber dam valve handwheel. It often requires repeated attempts, especially on rainy days, at night, or when there is water in the well. Such operation is even more difficult. In order to further solve this problem, some maintenance personnel adopt a technical solution of not removing the operating lever, but directly inserting the lower end of the operating lever into the valve handwheel. Because the valve well cover needs to be covered, the operating lever cannot be extended out of the valve well. Therefore, the maintenance personnel can only let the upper end of the operating lever lean against the well wall of the valve well or the inner wall of the manhole. During operation, the maintenance personnel have to lie on the wellhead and turn the handwheel at the upper end of the operating lever. Obviously, this solution is not convenient for the maintenance personnel to turn the operating lever, and it also poses a great safety hazard.

[0007] In order to make the operating rod extend as long as possible from the wellhead, some maintenance personnel abandoned the above plan. In order not to affect the storage of the operating rod, the previous operating rod was shortened. Usually, the lower end of the operating rod is not inserted into the valve handwheel, but is placed directly at the bottom of the well. The upper end of the operating rod is still leaning against the well wall of the valve well or the inner wall of the manhole. When in use, the operating rod is pulled up upright and its lower end is inserted into the valve handwheel for operation. As mentioned above, such alignment operation is not easy, and the height from the valve handwheel to the bottom of the well is very limited, which leads to the length of the operating rod extending out of the wellhead is also very limited. Usually, the length of the operating rod extending out of the wellhead does not exceed 60 cm, so the maintenance personnel can only bend over or squat across the wellhead to turn the operating rod handwheel. The maintenance personnel consume a lot of physical energy, have low efficiency, and pose a safety hazard.

[0008] However, the existing operating lever cannot be left exposed outside the valve well when not in use. On the one hand, it affects the city's appearance. On the other hand, there is a risk of misoperation by unrelated personnel causing the rubber dam to lower and release water. Therefore, the existing operating lever must be stored in a management room outside the well or directly stored in the well after use.

[0009] Existing technologies cannot meet the requirements. Summary of the Invention

[0010] In view of the above deficiencies in the prior art, the technical problem to be solved by the present application is to provide a rubber dam valve control rod for safely operating the rubber dam valve outside the rubber dam valve well.

[0011] To achieve the above-mentioned purpose, the technical solution adopted by the present application to solve its technical problem is: a rubber dam valve control rod, including a handwheel connecting device, a single-section cross-axis universal joint, a first rotating rod, a second rotating rod, a positioning and anti-retraction device, an operating handwheel, an unlocking handle, a connecting piece and an anti-slip limit device, characterized in that: the lower end of the handwheel connecting device is connected to the valve handwheel of the rubber dam valve, the upper end of the handwheel connecting device is connected to the output shaft of the single-section cross-axis universal joint, the input shaft of the single-section cross-axis universal joint is connected to the lower end of the first rotating rod, the first rotating rod and the second rotating rod are polygonal hollow tubes with the same cross-sectional shape, the number of sides of the polygon is 3 to 8, and the first rotating rod The length is not less than the length of the second rotating rod, the first rotating rod and the second rotating rod are axially mounted together, and a gap is set between the first rotating rod and the second rotating rod. The minimum value of the gap allows the first rotating rod and the second rotating rod to smoothly perform relative axial linear motion, and the maximum value of the gap allows the first rotating rod and the second rotating rod to perform relative circumferential motion of no more than 6 degrees, so that the first rotating rod and the second rotating rod form a telescopic structure, and at least one transparent positioning hole is axially provided on the side wall of the first rotating rod, and a positioning stop device and a transparent first through hole are provided on the lower end tube wall of the second rotating rod, and the cross section of the first through hole is parallel to the cross section of the positioning hole and the two are perpendicular. The distance is the shortest, and the positioning and anti-retraction device is a controllable one-way anti-retraction mechanism. The positioning and anti-retraction device does not affect the upward movement of the second rotating rod, so that the second rotating rod is arranged at the corresponding positioning hole position of the first rotating rod through the first through hole by relying on the positioning and anti-retraction device and will not fall. The axial lower end of the operating handwheel is connected to the upper end of the second rotating rod, and the upper end port of the second rotating rod is sealed. The outer edge contour diameter of the operating handwheel is larger than the outer diameter of the pipes of the first rotating rod and the second rotating rod and is smaller than the inner edge contour diameter of the wellhead manhole of the rubber dam valve well, so that the operating handwheel can freely enter and exit the wellhead manhole, and the unlocking handle can be movably arranged on the operating handwheel up and down, and the connecting piece is a slender pull rod or pull rope. The unlocking handle controls the upper end of the connecting piece, and the lower end of the connecting piece is connected to the positioning and anti-retraction device. The connecting piece is a straight line without elasticity. Pulling the unlocking handle upward can release the positioning and anti-retraction function of the positioning and anti-retraction device, thereby allowing the second rotating rod to move downward along the axial direction of the first rotating rod. The position of the anti-slip limit device is at the lower side of the wellhead manhole of the rubber dam valve well. The anti-slip limit device limits the maximum upward stroke of the second rotating rod to prevent the first rotating rod and the second rotating rod from being separated from the mutual axial fitting state. Rotating the operating handwheel can rotate the second rotating rod, thereby driving the first rotating rod, the single-section cross-axis universal joint and the handwheel connecting device and the valve handwheel of the rubber dam valve to rotate, thereby realizing the operation of the rubber dam valve.

[0012] When the first rotating rod is sleeved on the outside of the second rotating rod, a tubular protective ring is provided around the first rotating rod on the lower end surface of the operating hand wheel. The axial length of the tubular protective ring is 20 cm to 50 cm to prevent the operator's hand from touching the upper end of the first rotating rod and causing squeezing damage, thereby playing a safety protection role. The tubular protective ring does not affect the normal movement of the second rotating rod.

[0013] When the cross-sections of the first rotating rod and the second rotating rod are rectangular, the aspect ratio of the rectangle is 1:1 to 5:3.

[0014] When the number of the positioning holes is not less than 2, the positioning holes are arranged along an axial straight line of the first rotating rod, and the distance between adjacent positioning holes is 2 cm to 20 cm.

[0015] When the rubber dam valve control rod is stored in the rubber dam valve well, the uppermost end thereof does not exceed the wellhead manhole and is not lower than 0.3 meters from the wellhead manhole.

[0016] The length of the second rotating rod is 1.5 meters to 2.5 meters.

[0017] The unlocking handle is connected to the upper end of the guide column, and the guide column passes through the upper side of the operating handwheel to the lower side of the operating handwheel. The guide column can slide up and down in the channel it passes through. The cross-sectional shape of the guide column is circular or a polygonal shape with 3 to 8 sides. The lower end of the guide column is connected to the limit plate and the upper end of the connecting piece in sequence. The limit plate is circular or a polygonal shape with 3 to 8 sides. The outer edge contour diameter of the limit plate is larger than the edge of the channel through which the guide column passes and does not touch the tube wall of the first rotating rod and the second rotating rod. The length of the guide column is larger than the length of the channel through which it passes. The difference in length between the two is the up and down stroke of the unlocking handle. The up and down stroke of the unlocking handle is greater than the minimum unlocking stroke required by the positioning stop device and is less than the maximum unlocking stroke allowed by the positioning stop device.

[0018] The anti-slip limit device is a one-way anti-retraction mechanism. The anti-slip limit device does not affect the downward movement of the second rotating rod, but prevents the second rotating rod from continuing to move upward when the second rotating rod moves upward to a set limit position. The anti-slip limit device is arranged inside or outside the rubber dam valve control rod, and a transparent limiting hole is arranged on the tube wall near the upper end of the first rotating rod, and a transparent second through hole is arranged on the tube wall near the lower end of the second rotating rod. The cross section of the limiting hole is parallel to the cross section of the second through hole and the vertical distance between them is the shortest. The plane where the cross section of the limiting hole is located is parallel to the cross section of the positioning hole. The planes where the surfaces are located are not in the same plane, and the anti-slip limit device is arranged on the tube wall near the upper end of the first rotating rod or on the tube wall near the lower end of the second rotating rod. When the anti-slip limit device is arranged on the tube wall near the upper end of the first rotating rod, the anti-slip limit device is stuck at the second through hole position of the second rotating rod through the limiting hole, thereby preventing the second rotating rod from continuing to move upward. When the anti-slip limit device is arranged on the tube wall near the lower end of the second rotating rod, the anti-slip limit device is stuck at the limiting hole position through the second through hole of the second rotating rod, thereby preventing the second rotating rod from continuing to move upward.

[0019] The anti-slip and anti-retraction limit device includes a limit rope, the upper end of the limit rope is connected to the upper connection point of the lower end of the second rotating rod, and the lower end of the limit rope is connected to the lower connection point of the lower end of the first rotating rod. The length of the limit rope is equal to the straight-line distance between the upper connection point and the lower connection point when the second rotating rod reaches the set limit stroke upward.

[0020] The rubber dam valve control rod described in the present application has the following beneficial effects: the rubber dam valve control rod is an overall retractable structure, which can well meet the operator's requirements for the control rod height, and will not block the manhole of the rubber dam valve well, and will not hinder people from entering and exiting the valve well, thereby achieving the expected effect; a reliable gap is set between the first rotating rod and the second rotating rod, so that the telescopic operation between the second rotating rod and the first rotating rod is free of jamming, and the reliability of the circumferential transmission between the two is guaranteed, and the wear of the pipe wall between the two is greatly reduced; the lower end of the rubber dam valve control rod is connected to the handwheel of the rubber dam valve, and there is no need to insert the handwheel gap again during each operation; the rubber dam valve control rod is installed in the valve well, and there is no need to remove the rubber dam valve control rod from the valve well; the upper end of the rubber dam valve control rod is very close to the valve well entrance, and it is easy to realize the taking, placing and storing operation of the rubber dam valve control rod, and a single-section cross-axis universal joint is set to allow the rubber dam valve control rod to be tilted, so that the operation of the valve It is very flexible and also solves the damage to the rubber dam valve control rod and valve handwheel caused by the rigid rod structure; the length of the first rotating rod is not less than the length of the second rotating rod. Compared with the existing operating rod, even under the condition of the same cross-section, the mass of the second rotating rod is greatly reduced, and the height adjustment up and down is very easy; upper and lower limit structures are set, so that the upper end of the first rotating rod cannot push out the upper end of the second rotating rod, and the first rotating rod and the second rotating rod cannot be separated from each other's nested state, thereby ensuring the integrity of the structure; a positioning and retreat device with a torsion spring and corresponding positioning holes are provided to ensure the reliability of the positioning and retreat function; the positioning and retreat device is a controllable one-way retreat mechanism, so that the length of the rubber dam valve control rod can be well controlled and contracted, and has good adaptability; a tubular protective ring is provided to protect the operator from injury; the rubber dam valve control rod described in this application is easy to store, simple and flexible to operate, simple in structure, and very easy to produce and install; the overall structure is detachable for easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram showing the structure of a typical existing rubber dam valve well, wherein the rubber dam valve 2 is schematically drawn with a valve symbol.

[0022] FIG2 is a schematic diagram showing the rubber dam valve control rod of the present application housed in the rubber dam valve well.

[0023] FIG3 is a schematic diagram showing the rubber dam valve control rod of the present application being pulled out from the rubber dam valve well.

[0024] 4 , 5 , 6 and 7 are schematic diagrams showing partial cross-sectional shapes of the first rotating rod 9 and the second rotating rod 10 of the rubber dam valve control rod described in the present application.

[0025] FIG8 is a partial cross-sectional view of the control rod of the rubber dam valve of the present application.

[0026] Figures 9, 10 and 11 are schematic diagrams of an embodiment of the positioning and retreat-stopping device 11 described in the present application, wherein Figures 9 and 11 show that the positioning and retreat-stopping device 11 is set inside the second rotating rod 10, Figure 11 is a side view of Figure 9, and Figure 11 does not show the first rotating rod 9 and the limiting pull rope 16, and Figure 10 is a separate isolation drawing of the embodiment of the positioning and retreat-stopping device 11 from Figure 9.

[0027] Figures 12, 13, 14 and 15 are schematic diagrams of embodiments of the anti-slip limit device 15 of the rubber dam valve control rod of the present application, wherein Figures 12 and 13 show that the anti-slip limit device 15 is arranged inside the rubber dam valve control rod, and Figures 14 and 15 show that the anti-slip limit device 15 is arranged outside the rubber dam valve control rod. The anti-slip limit and retreat device 15 shown in Figures 12 and 14 has not reached the limit point, and the anti-slip limit and retreat device 15 shown in Figures 13 and 15 has reached the limit point.

[0028] 16 and 17 are plan views showing an embodiment of the positioning and preventing device 11 for the control rod of the rubber dam valve of the present application, wherein FIG16 shows that the positioning point has not been reached, and FIG17 shows that the positioning point has been reached.

[0029] 18, 19 and 20 are schematic diagrams showing embodiments of the structure of the upper end portion of the rubber dam valve control rod.

[0030] FIG21 is a schematic diagram showing the embodiment of the positioning and preventing retreat device 11 shown in FIG9 , FIG10 and FIG11 when it is in the positioning and preventing retreat state.

[0031] FIG. 22 is a schematic diagram showing an embodiment in which the positioning and preventing device 11 is arranged on the outer wall of the second rotating rod 10 .

[0032] Among them, 1, pipeline 2, rubber dam valve 3, valve handwheel 4, ladder 5, wellhead manhole 6, well cover 7, handwheel connecting device 8, single-section cross-axis universal joint 9, first rotating rod 901, positioning hole 902, limit hole 10, second rotating rod 101, first through hole 102, second through hole 11, positioning anti-retraction device 111, anti-retraction bracket 112, first rotating shaft 113, shaft sleeve 114, second rotating shaft 115, rotating arm 116, first Torsion spring 117, first bracket 118, first roller 119, first axle 12, operating handwheel 13, unlocking handle 131, guide column 132, limit plate 14, connector 15, anti-slip limit device 150, second torsion spring 151, push rod 152, third rotating shaft 157, second bracket 158, second roller 159, second axle 16, limit rope 161, upper connection point 162, lower connection point 17, tubular protective ring sleeve. DETAILED DESCRIPTION

[0033] The technical solution of the rubber dam valve control rod of the present application will be further described in detail below using the embodiment shown in the accompanying drawings as an example.

[0034] As shown in Figure 2, a rubber dam valve control rod includes a handwheel connecting device 7, a single-section cross-axis universal joint 8, a first rotating rod 9, a second rotating rod 10, a positioning and anti-retraction device 11, an operating handwheel 12, an unlocking handle 13, a connecting piece 14 and an anti-slip limit device 15. It is characterized in that: in the rubber dam valve well, the structure of the rubber dam valve control rod is from bottom to top, the lower end of the handwheel connecting device 7 is connected to the valve handwheel 3 of the rubber dam valve 2, the upper end of the handwheel connecting device 7 is connected to the output shaft of the single-section cross-axis universal joint 8, and the input shaft of the single-section cross-axis universal joint 8 is connected to the lower end of the first rotating rod 9.

[0035] The first rotating rod 9 and the second rotating rod 10 are polygonal hollow tubes with the same cross-sectional shape, as shown in Figures 4, 5, 6 and 7. The number of sides of the polygon is 3 to 8. The figures do not show the case of 6 to 8 sides, but it is not difficult to understand the cross-sectional shape described in the present application by analogy. When the cross-section of the first rotating rod 9 and the second rotating rod 10 is a rectangle as shown in Figure 4, the aspect ratio of the rectangle is 1:1 to 5:3. If the difference between the length and width of the rectangle is too large, it will be detrimental to the utilization of the internal space of the tube, affect the placement of components in the tube, and deteriorate its mechanical properties. Although this can be solved by increasing the wall thickness, this will undoubtedly increase the weight and reduce the space inside the tube, which is obviously not the technical direction of the solution described in the present application. The existing technology only considers its mechanical properties and allows the rectangle to have a wider range of aspect ratios and thicker wall thickness. It can be seen that when the aspect ratio of the rectangle is 1:1, a square as shown in Figure 5 will be formed, an equilateral triangle as shown in Figure 6, and an equilateral pentagon as shown in Figure 7. Of course, according to specific technical requirements, the solution described in this application does not exclude unequal-sided polygons.

[0036] The length of the first rotating rod 9 is not less than the length of the second rotating rod 10. The first rotating rod 9 and the second rotating rod 10 are axially mounted together. Here, an embodiment in which the first rotating rod 9 can be mounted on the outside of the second rotating rod 10 is selected for illustration. Based on this, it is not difficult to understand the embodiment in which the second rotating rod 10 is mounted on the outside of the first rotating rod 9. A gap is set between the first rotating rod 9 and the second rotating rod 10. The minimum value of the gap allows the first rotating rod 9 and the second rotating rod 10 to smoothly perform relative axial linear motion. The maximum value of the gap allows the first rotating rod 9 and the second rotating rod 10 to perform relative circumferential motion of no more than 6 degrees, so that the first rotating rod 9 and the second rotating rod 10 form a telescopic structure. It can be seen that the size of the gap will seriously affect the working performance of the telescopic structure. A gap that is too small will cause the axial motion between the second rotating rod 10 and the first rotating rod 9 to be not smooth enough or even to cause jamming or stuck. Ideally, the minimum value of the gap is greater than 0 mm. According to common knowledge in the field, the minimum value of the gap is related to the smoothness and lubrication of the sliding surface and the contact condition. The existence of the gap will cause the second rotating rod 10 and the first rotating rod 9 to move smoothly. There is a possibility of relative circumferential movement, so when rotating the rubber dam valve control rod described in this application, an excessively large gap can easily cause the second rotating rod 10 and the tube wall of the first rotating rod 9 to suffer greater impact wear in the circumferential direction, or even get stuck or the second rotating rod 10 cannot transmit power to the first rotating rod 9. In addition, an excessively large gap will have unacceptable adverse effects on the positioning and retreat device 11 or the anti-slip limit device 15, such as functional failure, unreliability or component wear. Taking into account the possible uneven distribution of the gap, the scheme described in this application limits the relative circumferential circular movement between the second rotating rod 10 and the first rotating rod 9 to 6 degrees. The existing technology expresses this maximum gap as a length unit. Such an expression ignores the profound impact of the gap, which in turn leads to a one-sided, imprecise and inaccurate understanding of the technical solution.

[0037] At least one transparent positioning hole 901 is axially provided on the side wall of the first rotating rod 9, as shown in FIG8 . When the number of positioning holes 901 is at least two, each positioning hole 901 is arranged in a straight line along the axial direction of the first rotating rod 9 , and the distance between adjacent positioning holes 901 is 2 cm to 20 cm. If the distance is too small, the axial shear stress resistance strength of the tube wall between adjacent positioning holes will be reduced. The larger the distance, the greater the impact force that the lower edge of the positioning hole 901 and the components of the positioning stop device 11 may be subjected to during positioning, as shown in FIG17 , FIG21 and FIG22 . In the figure, the top end of the positioning bracket 111 rests on the lower edge of the positioning hole 901, and the upper side surface of the positioning bracket 111 rests on the upper edge of the first through hole 101, thereby preventing the positioning stop device 11 and the device connected thereto from moving downward. Excessive impact force may reduce the service life of the components or even damage them. Of course, too large a distance may also affect the positioning accuracy, causing the height of the operating hand wheel 12 to be too high or too low, thereby affecting operation.

[0038] A positioning and retreat preventing device 11 and a transparent first through hole 101 are provided on the tube wall at the lower end of the second rotating rod 10, as shown in Figures 9, 10, 11, 16, 17 and 21. In these embodiments, the positioning and retreat preventing device 11 is provided inside the second rotating rod 10. Of course, based on this and in combination with the common knowledge in this field, the embodiment of providing the positioning and retreat preventing device 11 on the outer wall of the second rotating rod 10 is also easy to understand. Please refer to Figure 22. The cross section of the first through hole 101 is parallel to the cross section of the positioning hole 901 and the vertical distance between the two is the shortest, that is, there is a gap between the two. The positioning and retreat preventing device 11 is a controllable one-way retreat preventing mechanism. The positioning and retreat preventing device 11 does not affect the upward movement of the second rotating rod 10, so that the second rotating rod 10 relies on the positioning and retreat preventing device 11 to pass through the first through hole 101 and is set at the corresponding positioning hole 901 position of the first rotating rod 9 without falling.

[0039] As shown in the embodiments of Figures 9, 10, 11, 16, 17, 21 and 22, the positioning and retreat preventing device 11 is arranged on the tube wall of the second rotating rod 10 via the first rotating shaft 112 or a first bracket 117 is arranged on the tube wall of the second rotating rod 10, the first rotating shaft 112 is arranged on the first bracket 117, the positioning and retreat preventing device 11 includes a rotating arm 115 and a first torsion spring 116, wherein in Figures 9, 10, 11 and 21, the rotating arm 115 is disc-shaped, and a retreat preventing bracket 111 is arranged at one end of the rotating arm 115, and the first rotating shaft 112 can be The center of the first torsion spring 116 and the rotation center of the rotating arm 115 are relatively rotated. A second rotating shaft 114 is provided at the other end of the rotating arm 115. A sleeve 113 is fitted on the second rotating shaft 114. The lower end of the connecting member 14 is on the sleeve 113. The anti-retraction bracket 111 and the second rotating shaft 114 are respectively located on the radial sides of the first rotating shaft 112. One end of the first torsion spring 116 is not against the tube wall of the second rotating rod 10, and one end of the first torsion spring 116 is not against the anti-retraction bracket 111. The force direction of the torsion spring 116 makes the anti-retraction bracket The bracket 111 applies pressure to the tube wall of the first rotating rod 9 through the first through hole 101. As shown in Figures 9 and 21, when the second rotating rod 10 moves upward, when it encounters the positioning hole 901, the top of the anti-retreat bracket 111 will enter the positioning hole 901, thereby making the anti-retreat bracket 111 lean against the lower edge of the positioning hole 901, and the upper side of the positioning bracket 111 leans against the upper edge of the first through hole 101, so that the positioning anti-retreat device 11 and the related devices connected thereto cannot move downward, thereby realizing the positioning of the second rotating rod 10 and realizing the stretching and positioning of the rubber dam valve control rod described in this application. 3 ; pull the connecting piece 14 upward to overcome the elastic force of the first torsion spring 116 so that the rotating arm 115 rotates around the first rotating shaft 112 and thereby drives the anti-recognition bracket 111 to rotate. At the same time, the second rotating rod 10 will also move upward together, so that the anti-recognition bracket 111 is completely disengaged from the positioning hole 901, and finally the positioning of the second rotating rod 10 is released. When the second rotating rod 10 moves downward, the connecting piece 14 must be pulled continuously so that the top end of the anti-recognition bracket 111 cannot enter the positioning hole 901, thereby realizing the contraction operation of the rubber dam valve control rod described in this application, which is convenient for storage, as shown in FIG. 2 .

[0040] The top of the anti-retraction bracket 111 shown in FIG21 is arc-shaped, and the top of the anti-retraction bracket 111 shown in FIG22 is provided with a roller device. According to this solution and common knowledge in the field, both have advantages and disadvantages.

[0041] As shown in Figures 18, 19 and 20, the axial lower end of the operating handwheel 12 is connected to the upper end of the second rotating rod 10, and the upper end of the second rotating rod 10 is blocked. The outer edge contour diameter of the operating handwheel 12 is larger than the outer diameter of the first rotating rod 9 and the second rotating rod 10 and smaller than the inner edge contour diameter of the wellhead manhole 5 of the rubber dam valve well, so that the operating handwheel 12 can freely enter and exit the wellhead manhole 5. The unlocking handle 13 can be movably arranged on the operating handwheel 12. The connecting piece 14 is a thin A long pull rod or pull rope, the unlocking handle 13 controls the upper end of the connecting member 14, the lower end of the connecting member 14 is connected to the positioning and retreat preventing device 11, and the connecting member 14 is a straight line without elasticity. Pulling up the unlocking handle 13 can release the retreat preventing function of the positioning and retreat preventing device 11, thereby allowing the second rotating rod 10 to move downward along the axial direction of the first rotating rod 9. If the positioning and retreat preventing device 11 is arranged on the outer wall of the second rotating rod 10, the connecting member 14 that controls it is also arranged on the outside of the rubber dam valve control rod, as shown in Figure 20.

[0042] The unlocking handle 13 is connected to the upper end of the guide column 131, and the guide column 131 passes through the upper side of the operating hand wheel 12 to the lower side of the operating hand wheel 12, and the guide column 131 can slide up and down in the channel through which it passes. The cross-sectional shape of the guide column 131 is circular or a polygon with 3 to 8 sides, and the lower end of the guide column 131 is connected to the limit plate 132 and the upper end of the connecting member 14 in sequence. The limit plate 132 is circular or a polygon with 3 to 8 sides, and the outer edge contour diameter of the limit plate 132 is larger than the edge of the channel through which the guide column 131 passes and does not touch the tube wall of the first rotating rod 9 and the second rotating rod 10. The length of the guide column 131 is larger than the length of the channel through which it passes, and the length difference between the two is the up and down stroke of the unlocking handle 13, and the up and down stroke of the unlocking handle 13 is greater than the minimum unlocking stroke required by the positioning stop device 11 and less than the maximum unlocking stroke allowed by the positioning stop device 11.

[0043] The anti-slip limit device 15 is located at the lower side of the wellhead manhole 5 of the rubber dam valve well. The anti-slip limit device 15 limits the maximum upward stroke of the second rotating rod 10 to prevent the first rotating rod 9 and the second rotating rod 10 from being separated from the mutual axial fitting state. The solution described in this application does not recommend setting the positioning stop device 11 or the anti-slip limit device 15 on the outside of the rubber dam valve control rod at the wellhead manhole 5 and the manhole cover 6 to prevent inconvenience or damage during operation.

[0044] As shown in Figures 12, 13, 14 and 15, in this embodiment, the second rotating rod 10 is on the inner side of the first rotating rod 9. The connecting member 14 in the figure will not have any effect on the anti-slip limit device. The anti-slip limit device 15 is a one-way stop mechanism. The anti-slip limit device 15 does not affect the downward movement of the second rotating rod 10, but prevents the second rotating rod 10 from continuing to move upward when the second rotating rod 10 moves upward to the set limit position. The anti-slip limit device 15 is arranged inside or outside the rubber dam valve control rod, wherein Figures 12 and 13 are embodiments in which the anti-slip limit device 15 is arranged inside the rubber dam valve control rod, and Figures 14 and 15 are embodiments in which the anti-slip limit device 15 is arranged outside the rubber dam valve control rod. A transparent limiting hole 902 is provided on the pipe wall near the upper end of the first rotating rod 9, and a transparent second through hole 102 is provided on the pipe wall near the lower end of the second rotating rod 10. The cross-sections of the positioning hole 902 and the second through hole 102 are parallel and the vertical distance between them is the shortest. The plane where the cross-section of the limiting hole 902 is located is not in the same plane as the plane where the cross-section of the positioning hole 901 is located, so that the positioning hole 901 will not affect the anti-slip limit device 15. The anti-slip limit device 15 is arranged on the tube wall near the upper end of the first rotating rod 9 or on the tube wall near the lower end of the second rotating rod 10. When the anti-slip limit device 15 is arranged on the tube wall near the upper end of the first rotating rod 9, the anti-slip limit device 15 is stuck at the position of the second through hole 102 of the second rotating rod 10 through the limiting hole 902, thereby preventing the second rotating rod 10 from continuing to move upward. When the anti-slip limit device 15 is arranged on the tube wall near the lower end of the second rotating rod 10, the anti-slip limit device 15 is stuck at the position of the limiting hole 902 through the second through hole 102 of the second rotating rod 10, thereby preventing the second rotating rod 10 from continuing to move upward.

[0045] In FIG12 , a second bracket 157 is provided on the inner wall of the second rotating rod 10, and the third rotating shaft 152 is rotatably passed through the second bracket 157, the rotating shaft end of the push rod 151 and the center of the second torsion spring 150. Of course, as an optional embodiment, the second bracket can also be eliminated, and the third rotating shaft 152 can be provided on the tube wall of the second rotating rod 10, so that the tube wall of the second rotating rod 10 plays the role of the second bracket 157. One end of the second torsion spring 150 does not lean against the inner wall of the second rotating rod 10, and the other end of the second torsion spring 150 does not lean against the push rod 151. The direction of the force applied by the second torsion spring 150 makes the top end of the push rod 151 pass through the second The through hole 102 is pressed against the inner wall of the first rotating rod 9. In this embodiment, a roller mechanism consisting of a second roller 158 and a second wheel axle is provided at the top end of the push rod 151. When the second rotating rod 10 moves upward to the maximum stroke, as shown in Figure 13, the top end of the push rod 151 is pressed against the upper edge of the limiting hole 902, and the lower side of the push rod 151 is pressed against the lower edge of the second through hole 102, so that the second rotating rod 10 cannot continue to move upward, thereby achieving the effect of limiting and preventing disengagement. At this time, if the second rotating rod 10 moves downward, the push rod 151 will disengage from the limiting hole 902 along the lower edge of the second through hole 102, and will not affect the continued operation of the second rotating rod 10.

[0046] By comparison, it is easy to understand the structure and specific working principle of the embodiment of the anti-slip limit device 15 shown in Figures 14 and 15, and no further details are given here.

[0047] Of course, by analogy, it is easy to obtain an embodiment of the anti-slip limit device 15 when the second rotating rod 10 is mounted on the outer side of the first rotating rod 9, and its structure and specific working principle are also easy to understand, which will not be described in detail here.

[0048] As shown in Figures 2 and 3, the anti-slip and stop limit device 15 includes a limit rope 16, the upper end of the limit rope 16 is connected to the upper connection point 161 of the lower end of the second rotating rod 10, and the lower end of the limit rope 16 is connected to the lower connection point 162 of the lower end of the first rotating rod 9. The length of the limit rope 16 is equal to the straight-line distance between the upper connection point 161 and the lower connection point 162 when the second rotating rod 10 reaches the set limit stroke upward. The advantages of this embodiment are simple structure and high reliability, but it bends in the tube and is easy to wear against the tube wall, so it is advisable to select polymer synthetic fibers such as POM, PE, PP, PA, and the inner wall of the first rotating rod 9 should be smooth and free of burrs.

[0049] As shown in FIG3 , after the rubber dam valve control rod described in the present application is stretched to the set positioning point, rotating the operating handwheel 12 can rotate the second rotating rod 10, thereby driving the first rotating rod 9, the single-section cross-axis universal joint 8, the handwheel connecting device 7, and the valve handwheel 3 of the rubber dam valve 2 to rotate, thereby operating the rubber dam valve 2.

[0050] As shown in Figures 18, 19 and 20, when the first rotating rod 9 is mounted on the outside of the second rotating rod 10, a tubular protective ring 17 is provided around the first rotating rod 9 on the lower end surface of the operating handwheel 12. The axial length of the tubular protective ring 17 is 20 cm to 50 cm to prevent the operator's hand from touching the upper end of the first rotating rod 9 and causing squeezing damage. The tubular protective ring 17 does not affect the normal movement of the second rotating rod 10 and only serves as a safety protection.

[0051] When the rubber dam valve control rod is retracted and stored in the rubber dam valve well, its top end does not exceed the wellhead manhole 5 and is not lower than 0.3 meters below the wellhead manhole 5. The solution described in the present application preferably sets its top end at the wellhead manhole 5, so that the operating hand wheel 12 can lean against or set a hook to hang on the inner wall of the wellhead manhole 5, which is conducive to pulling out and lowering the rubber dam valve control rod. When its top end is below the wellhead manhole 5, it can be considered to set a corresponding device such as a hook to make it no more than 0.3 meters, because the arm length of most adults is about 0.6 meters, and a position that is too low is very unfavorable for the use of the rubber dam valve control rod.

[0052] The length of the second rotating rod 10 is 1.5 meters to 2.5 meters. In order to ensure the stability of the rubber dam valve control rod and the normal arrangement of the corresponding structural parts, when the second rotating rod 10 reaches the maximum stroke, at least 20 cm of length must be reserved to overlap with the first rotating rod 9. If an operating height of 1.3 meters is selected, the lower limit of the second rotating rod 10 is not less than 1.5 meters. For most ordinary rubber dam valve control rods, the upper limit length of the second rotating rod 10 should not exceed 2 meters. For rubber dam valve control rods with higher requirements, the overlapping length of the second rotating rod 10 and the first rotating rod 9 is 50 cm. In order to ensure that personnel or other equipment can smoothly enter and exit the rubber dam valve well, the extended length of the second rotating rod 10 should be 2 meters, and the upper limit value of the second rotating rod 10 does not exceed 2.5 meters. Compared with the operating rod in the prior art, the length of the second rotating rod 10 is greatly reduced, and the effect is significant.

[0053] The length of the first rotating rod 9 is not less than that of the second rotating rod 10. Compared with the operating rod of the prior art, even under the condition of the same cross-sectional area, the mass of the second rotating rod 10 is greatly reduced, making the operation of adjusting the height up and down very easy. Excessive mass is not conducive to the operation of the rubber dam control rod and its downward impact force is very large. However, combined with the solution described in the present application and common knowledge in the field, it is easy to understand that the mass of the second rotating rod 10 accounts for the vast majority of the total mass of the movable components of the rubber dam control rod described in the present application. For a shorter second rotating rod 10, the total mass will be even lower. By comparison, it can be seen that the solution described in the present application has achieved significant improvement.

[0054] If the operating rod of the existing rigid rod structure is directly connected to the rubber dam valve handwheel, the upper end of the operating rod will inevitably produce lateral movement during operation, which can easily damage the operating rod and the rubber dam valve handwheel. As shown in Figures 2 and 3, the solution described in this application includes a single-section cross-axis universal joint 8, the input shaft of the single-section cross-axis universal joint 8 is connected to the lower end of the first rotating rod 9, and the output shaft of the single-section cross-axis universal joint 8 is connected to the handwheel connecting device 7. This solution solves the damage to the rubber dam valve control rod and the valve handwheel caused by the rigid rod structure, and also allows the rubber dam valve control rod to be tilted, making the valve operation very flexible and able to adapt well to the operator standing at the edge of the rubber dam valve well for operation. The valve operating rod in the prior art has always insisted on using a rigid rod structure with a fixed length, and this idea of ​​the prior art has remained unchanged.

[0055] The solution described in the present application allows the rubber dam valve control rod to be tilted, so the outer wall of the rubber dam valve control rod described in the present application may touch the inner wall edge of the wellhead manhole 5. As a preferred solution, the solution described in the present application should choose to set the anti-slip limit device 15, the connecting piece 14, and the positioning and stopping device 11 inside the rubber dam valve control rod. Of course, the present application does not exclude the feasibility of other embodiments based on the solution described in the present application.

[0056] The rubber dam control lever of the present application is operated as follows: the operator first opens the manhole cover 6, and then stands at the edge of the rubber dam valve well, bends down, and pulls the operating hand wheel 12 upward from the manhole 5 at the wellhead. During the upward pulling process, a metallic collision sound is usually heard. This is the sound of the top of the anti-retraction bracket 111 of the positioning anti-retraction device 11 hitting the pipe wall. When the operating hand wheel 12 reaches a height suitable for the operator, the operator continues to hold the operating hand wheel 12 and moves it slightly downward until it stops. At this time, the positioning anti-retraction device 11 takes effect, and the operator can turn the operating hand wheel 12 to control the rubber dam valve 2. After the operation is completed, the operator pulls up the unlocking handle 13. At this time, the operating hand wheel 12 and the second rotating rod 10 will also move slightly upward, releasing the positioning anti-retraction function. The operator continues to hold the unlocking handle 13 and moves it downward. At the same time, the operating hand wheel 12 and the second rotating rod 10 will also move downward under the action of gravity, so that the rubber dam valve control lever is retracted to the storage length and no longer moves. The operator can then let go and close the manhole cover 6 to complete this operation task. According to common knowledge in this field, as usage experience accumulates, the operating mode and method will tend to be improved, and the solution described in this application may also be partially improved.

[0057] Usually, there is a certain difference in the depth of the rubber dam valve well. In order to make the production of the rubber dam valve control rod described in this application serialized and standardized, the solution described in this application can also use the positioning stop device 11 and the positioning hole 901 to determine the required length of the rubber dam valve control rod to be retracted to the required storage length, without having to carry out targeted customized design for each rubber dam valve well.

[0058] Like all technical solutions, the solution described in this application may have defects, but these defects will not change the development direction of the technology in this field led by the technical solution described in this application. With the advancement of technology, the gradual resolution of these defects will enable the solution described in this application to be improved, and even provide better ideas for the development of technology in this field.

[0059] Of course, without departing from the framework of this application, there may be other options and developments as well as equivalent devices that we can foresee.

Claims

1. A rubber dam valve control rod, comprising a handwheel connecting device (7), a single-section cross-axis universal joint (8), a first rotating rod (9), a second rotating rod (10), a positioning and stopping device (11), an operating handwheel (12), an unlocking handle (13), a connecting piece (14) and an anti-slip limit device (15), characterized in that: The lower end of the handwheel connecting device (7) is connected to the valve handwheel (3) of the rubber dam valve (2), the upper end of the handwheel connecting device (7) is connected to the output shaft of the single-section cross-axis universal joint (8), the input shaft of the single-section cross-axis universal joint (8) is connected to the lower end of the first rotating rod (9), the first rotating rod (9) and the second rotating rod (10) are polygonal hollow tubes with the same cross-sectional shape, the number of sides of the polygon is 3 to 8, the length of the first rotating rod (9) is not less than the length of the second rotating rod (10), the first rotating rod (9) and the second rotating rod (10) are axially sleeved together, a gap is set between the first rotating rod (9) and the second rotating rod (10), so that the first rotating rod (9) and the second rotating rod (10) are ) forms a telescopic structure, at least one transparent positioning hole (901) is axially arranged on the side wall of the first rotating rod (9), and a positioning stop device (11) and a transparent first through hole (101) are arranged on the lower end tube wall of the second rotating rod (10), the cross section of the first through hole (101) is parallel to the cross section of the positioning hole (901) and the vertical distance between the two is the shortest, the positioning stop device (11) is a controllable one-way stop mechanism, the positioning stop device (11) does not affect the upward movement of the second rotating rod (10), so that the second rotating rod (10) relies on the positioning stop device (11) to pass through the first through hole (101) and is set at the corresponding positioning hole (901) position of the first rotating rod (9) without falling, the operation The axial lower end of the hand wheel (12) is connected to the upper end of the second rotating rod (10), and the upper end of the second rotating rod (10) is blocked. The outer edge profile diameter of the operating hand wheel (12) is larger than the outer diameter of the first rotating rod (9) and the second rotating rod (10) and smaller than the inner edge profile diameter of the wellhead manhole (5) of the rubber dam valve well, so that the operating hand wheel (12) can freely enter and exit the wellhead manhole (5). The unlocking handle (13) can be movably arranged on the operating hand wheel (12) up and down. The connecting member (14) is a slender pull rod or a pull rope. The unlocking handle (13) controls the upper end of the connecting member (14). The lower end of the connecting member (14) is connected to the positioning stop device (11). The connecting member (14) is a straight non-elastic The invention relates to a linear device. Pulling up the unlocking handle (13) can release the positioning anti-retraction device (11) from its anti-retraction function, thereby allowing the second rotating rod (10) to move axially downward along the first rotating rod (9). The anti-slip limit device (15) is located at the lower side of the wellhead manhole (5) of the rubber dam valve well. The anti-slip limit device (15) limits the maximum upward stroke of the second rotating rod (10) to prevent the first rotating rod (9) and the second rotating rod (10) from being separated from the mutually axially fitted state. Rotating the operating handwheel (12) can rotate the second rotating rod (10), thereby driving the first rotating rod (9), the single-section cross-axis universal joint (8), the handwheel connecting device (7), and the valve handwheel (3) of the rubber dam valve (2) to rotate, thereby realizing the operation of the rubber dam valve (2).

2. The rubber dam valve control rod according to claim 1, characterized in that: When the first rotating rod (9) is sleeved on the outside of the second rotating rod (10), a tubular protective ring (17) is provided around the first rotating rod (9) on the lower end surface of the operating hand wheel (12). The axial length of the tubular protective ring (17) is 20 cm to 50 cm to prevent the operator's hand from touching the upper end of the first rotating rod (9) and causing squeezing damage. The tubular protective ring (17) does not affect the normal movement of the second rotating rod (10).

3. The rubber dam valve control rod according to claim 1, characterized in that: When the cross-sections of the first rotating rod (9) and the second rotating rod (10) are rectangular, the aspect ratio of the rectangle is 1:1 to 5:

3.

4. The rubber dam valve control rod according to claim 1, characterized in that: When the number of the positioning holes (901) is not less than 2, each positioning hole (901) is arranged along the axial straight line of the first rotating rod (9), and the distance between adjacent positioning holes (901) is 2 cm to 20 cm.

5. The rubber dam valve control rod according to claim 1, characterized in that: When the rubber dam valve control rod is stored in the rubber dam valve well, its uppermost end does not exceed the wellhead manhole (5) and is not lower than 0.3 meters from the wellhead manhole (5).

6. The rubber dam valve control rod according to claim 1, characterized in that: The length of the second rotating rod (10) is 1.5 meters to 2.5 meters.

7. The rubber dam valve control rod according to claim 1, characterized in that: The minimum value of the gap enables the first rotating rod (9) and the second rotating rod (10) to smoothly perform relative axial linear motion, and the maximum value of the gap enables the first rotating rod (9) and the second rotating rod (10) to perform relative circumferential motion of no more than 6 degrees.

8. The rubber dam valve control rod according to claim 1, characterized in that: The unlocking handle (13) is connected to the upper end of the guide column (131), and the guide column (131) passes through the upper side of the operating hand wheel (12) to the lower side of the operating hand wheel (12). The guide column (131) can slide up and down in the channel through which it passes. The cross-sectional shape of the guide column (131) is circular or polygonal with 3 to 8 sides. The lower end of the guide column (131) is connected to the upper end of the limit plate (132) and the connector (14) in sequence. The limit plate (132) is circular or polygonal with 3 to 8 sides. The limit plate (132) is in a polygonal shape, the outer edge profile diameter of the limit plate (132) is larger than the edge of the channel through which the guide column (131) passes and does not touch the tube wall of the first rotating rod (9) and the second rotating rod (10), the length of the guide column (131) is larger than the length of the channel through which it passes, and the length difference between the two is the up and down stroke of the unlocking handle (13), and the up and down stroke of the unlocking handle (13) is larger than the minimum unlocking stroke required by the positioning and stopping device (11) and smaller than the maximum unlocking stroke allowed by the positioning and stopping device (11).

9. The rubber dam valve control rod according to claim 1, characterized in that: The anti-slip limit device (15) is a one-way stop mechanism. The anti-slip limit device (15) does not affect the downward movement of the second rotating rod (10), but prevents the second rotating rod (10) from continuing to move upward when the second rotating rod (10) moves upward to a set limit position. The anti-slip limit device (15) is arranged inside or outside the rubber dam valve control rod. A transparent limit hole (902) is arranged on the pipe wall near the upper end of the first rotating rod (9), and a transparent second through hole (102) is arranged on the pipe wall near the lower end of the second rotating rod (10). The cross sections of the limit hole (902) and the second through hole (102) are parallel and the vertical distance between them is the shortest. The plane where the cross section of the limit hole (902) is located is parallel to the plane where the cross section of the positioning hole (901) is located. The two rotating rods (10) are not in the same plane. The anti-slip limit device (15) is arranged on the tube wall near the upper end of the first rotating rod (9) or on the tube wall near the lower end of the second rotating rod (10). When the anti-slip limit device (15) is arranged on the tube wall near the upper end of the first rotating rod (9), the anti-slip limit device (15) is stuck at the position of the second through hole (102) of the second rotating rod (10) through the limiting hole (902), thereby preventing the second rotating rod (10) from continuing to move upward. When the anti-slip limit device (15) is arranged on the tube wall near the lower end of the second rotating rod (10), the anti-slip limit device (15) is stuck at the position of the limiting hole (902) through the second through hole (102) of the second rotating rod (10), thereby preventing the second rotating rod (10) from continuing to move upward.

10. The rubber dam valve control rod according to claim 1, characterized in that: The anti-drop limit device (15) comprises a limit rope (16), the upper end of the limit rope (16) is connected to the upper connection point (161) of the lower end of the second rotating rod (10), and the lower end of the limit rope (16) is connected to the lower connection point (162) of the lower end of the first rotating rod (9). The length of the limit rope (16) is equal to the straight-line distance between the upper connection point (161) and the lower connection point (162) when the second rotating rod (10) reaches a set limit stroke upward.

Images