Jacking device for kerosene charging and discharging valve

Abstract

The invention provides a jacking device for a kerosene adding and discharging valve. The jacking device comprises a jacking tool, a fixing nut, a ball lock mechanism, a clamping sleeve and a check ring. The jacking tool is arranged at the inlet position of the kerosene adding and discharging valve; the outer wall of the bottom of the ejection tool is sleeved with the clamping sleeve; the ball lock mechanism is arranged between the clamping sleeve and the outer wall of the ejection tool; the check ring is arranged in a check ring groove in the peripheral wall of the bottom end of the ejection tool. The fixing nut is in threaded connection with the outer wall of the ejection tool, and the fixing nut is arranged above the clamping sleeve; the fixing nut is rotated, so that the fixing nut moves towards the clamping sleeve relative to the ejection tool, and the ejection tool and the kerosene adding and discharging valve are connected in a locked mode through the ball lock mechanism. The liquid rocket kerosene charging and discharging valve can be safely and reliably opened, the impact on the valve element is small, the valve is prevented from being damaged, visual detection of opening and closing of the valve is supported, the movement state and the displacement condition of the valve element are evaluated, and the valve element can be repeatedly used.

Description

Technical Field

[0001] This application relates to the technical field of aerospace propulsion systems and valve testing equipment, and in particular to a top-opening device for a kerosene filling and draining valve. Background Technology

[0002] The filler / release valve is a key component in the propellant loading and release system of liquid-fueled launch vehicles. It is typically installed at the bottom or side of the propellant tank, connecting the ground loading equipment to the onboard propellant piping system. It reliably controls the opening and closing of the propellant during loading and release, and effectively seals the tank after operation to prevent leakage. As a critical valve operating under high pressure and alternating high and low temperature environments, the reliability of the filler / release valve directly affects the safety of the propellant system and the success rate of mission execution. During factory inspection and final assembly testing, the valve's operational flexibility and valve core extension distance must be checked by opening the valve.

[0003] Traditional methods typically employ a valve core connector, such as the one disclosed in patent publication number CN120063061A, for actuation testing. However, this structure is bulky, complex to assemble, lacks accurate assessment of the valve core's movement and displacement, and the pneumatic drive method is prone to causing valve damage.

[0004] Although a subsequent patent publication number CN119147160A proposed replacing the pneumatic structure with a handwheel and screw mechanism to reduce the risk of damage, it still could not effectively fix and open the kerosene filling and drain valve without a flange structure, thus limiting the implementation of functional tests.

[0005] Therefore, the urgent technical problem to be solved is: how to provide a top-opening device for kerosene filling and draining valves, to solve the technical problems in the existing technology where the top-opening tooling is bulky and complex to assemble, the valve core opening distance cannot be quantified, the valve core movement state and displacement lack accurate assessment, and the top-opening tooling has a large impact on the valve core, and the pneumatic drive of the top-opening tooling is prone to valve damage. Summary of the Invention

[0006] The purpose of this application is to provide a top-opening device for a kerosene filling and draining valve, which can safely and reliably open the liquid rocket kerosene filling and draining valve without relying on a flange structure, with less impact on the valve core, avoiding valve damage, and supporting intuitive detection of valve opening and closing, realizing the evaluation of the valve core's movement state and displacement, and is reusable.

[0007] To achieve the above objectives, this application provides a top-opening device for a kerosene filling / refilling valve. The device includes: a top-opening fixture, a fixing nut, a ball locking mechanism, a ferrule, and a retaining ring. The top-opening fixture is positioned at the inlet of the kerosene filling / refilling valve. The ferrule is fitted onto the bottom outer wall of the top-opening fixture. The ball locking mechanism is positioned between the ferrule and the outer wall of the top-opening fixture. The retaining ring is positioned within a retaining ring groove on the outer peripheral wall of the bottom end of the top-opening fixture. The fixing nut is threaded to the outer wall of the top-opening fixture and is positioned above the ferrule. Rotating the fixing nut causes it to move relative to the top-opening fixture towards the ferrule, and the ball locking mechanism locks the top-opening fixture to the kerosene filling / refilling valve.

[0008] As described above, the top-opening device for a kerosene filling and draining valve includes a ball lock mechanism comprising a steel ball; the top-opening fixture comprising a steel ball mounting position; the ferrule comprising a steel ball working position; the outer peripheral wall of the kerosene filling and draining valve having a groove; the steel ball is placed in the steel ball working position, and the fixing nut is rotated so that the fixing nut moves relative to the top-opening fixture toward the ferrule, and the steel ball moves from the steel ball working position into the steel ball mounting position and the groove.

[0009] The aforementioned top-opening device for a kerosene filling / refilling valve includes a lower base, a screw handwheel mechanism, and a push rod mechanism. The screw handwheel mechanism is vertically mounted on the lower base, with its bottom extending into the lower base. The push rod mechanism is located at the bottom end of the screw handwheel mechanism and is correspondingly positioned above the valve core of the kerosene filling / refilling valve. The screw handwheel mechanism drives the push rod mechanism to move towards the valve core of the kerosene filling / refilling valve, thereby opening the valve.

[0010] As described above, the opening device for a kerosene filling / refilling valve includes a screw-handwheel mechanism comprising: a handwheel, a screw, a guide rod, and a slider; the handwheel is fixedly connected to the screw; the guide rod is parallel to the screw and disposed beside the screw; the slider is threadedly connected to the screw and is sleeved on the guide rod; the push rod mechanism is fixedly connected to the slider; rotating the handwheel causes the screw to rotate, and the slider moves along the length of the screw, thereby driving the push rod mechanism to move toward or away from the valve core of the kerosene filling / refilling valve.

[0011] As described above, the top-opening device for a kerosene filling and draining valve includes a top rod mechanism comprising: a top rod fixing plate, a top rod center rod, and a conical top rod surface; the top rod fixing plate and the conical top rod surface are respectively fixedly connected to both ends of the top rod center rod; the top rod fixing plate is fixedly connected to the slider; and the conical top rod surface is disposed above the valve core of the kerosene filling and draining valve.

[0012] As described above, the top-opening device for a kerosene filling and draining valve includes a support plate fixedly connected to the lower base; the support plate is arranged perpendicular to the lower base; an upper top plate is fixedly connected to the top of the support plate; and the upper top plate is provided with a screw mounting position for mounting the screw rod and a guide rod mounting position for mounting the guide rod.

[0013] As described above, the top-opening device for a kerosene filling and draining valve has a movable opening at the top of the lower base; the movable opening is used to observe the movement of the valve core.

[0014] As described above, the top-opening device for a kerosene filling and draining valve includes a plurality of steel ball mounting positions on the outer peripheral wall of the lower base; the sleeve includes a plurality of steel ball working positions; the plurality of steel ball working positions are correspondingly arranged with the plurality of steel ball mounting positions; the steel ball includes a plurality of steel balls, which are respectively arranged in the plurality of steel ball working positions.

[0015] As described above, the top-opening device for a kerosene filling and draining valve is provided with a scale on the side wall of the top rod fixing plate.

[0016] As described above, the opening device for a kerosene filling and draining valve includes a ring-shaped ferrule with wrench slots evenly distributed on the outer peripheral wall of the top of the ferrule.

[0017] The beneficial effects achieved by this application are as follows:

[0018] (1) The opening fixture of this application has a simple structure. By rotating the handwheel, the push rod mechanism is driven to contact the valve core and open the valve, thus realizing the reliability of the opening action.

[0019] (2) The ball lock mechanism of this application is matched with the top opening tooling, and the locking effect is achieved by moving the steel ball to the working position of the steel ball.

[0020] (3) This application provides an movable port on the lower base and a scale on the side wall of the top rod fixing plate. The valve core movement is observed through the movable port, and the maximum and minimum strokes of the valve core are recorded through the scale to quantify the opening effect and observe the opening effect and opening form. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the working state of a top-opening device for a kerosene filling and draining valve according to an embodiment of this application.

[0023] Figure 2 This is a perspective view of the top-opening tooling according to an embodiment of this application.

[0024] Figure 3 This is an exploded view of the fixing nut, ferrule, and steel ball in an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the retaining ring and kerosene filling / removing valve according to an embodiment of this application.

[0026] Figure 5 This is a cross-sectional view of a top-opening device for a kerosene filling and draining valve according to an embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the push rod mechanism according to an embodiment of this application.

[0028] Reference numerals: 1-Top opening fixture; 2-Fixing nut; 3-Steel ball; 4-Collar sleeve; 5-Retaining ring; 6-Kerosene filling and draining valve; 111-Handwheel; 112-Upper top plate; 113-Support plate; 114-Slider; 115-Guide rod; 116-Scale; 117-Lower base; 118-Steel ball mounting position; 119-Retaining ring groove; 120-Moving port; 121-Lead screw; 122-First bearing; 123-Second bearing ; 124-Push rod mechanism; 125-Upper fixing bolt; 126-Lower fixing bolt; 127-First push rod fixing plate; 128-Push rod fixing bolt; 129-Second push rod fixing plate; 130-Push rod fixing plate mounting position; 131-Conical push rod surface; 132-Push rod center rod; 411-Wrench holder; 412-Steel ball working position; 511-Retaining ring opening; 611-Valve core; 612-Spring; 613-End cap. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] like Figure 1-5As shown, this application provides a top-opening device for a kerosene filling and draining valve. The device includes: a top-opening fixture 1, a fixing nut 2, a ball locking mechanism, a retaining sleeve 4, and a retaining ring 5. The top-opening fixture 1 is located at the inlet position of the kerosene filling and draining valve 6. The retaining sleeve 4 is sleeved on the bottom outer wall of the top-opening fixture 1. The ball locking mechanism is located between the retaining sleeve 4 and the outer wall of the top-opening fixture 1. The retaining ring 5 is located in the retaining ring groove 119 on the outer peripheral wall of the bottom end of the top-opening fixture 1. The fixing nut 2 is threadedly connected to the outer wall of the top-opening fixture 1 and is located above the retaining sleeve 4. By rotating the fixing nut 2, the fixing nut 2 moves relative to the top-opening fixture 1 towards the retaining sleeve 4, and the ball locking mechanism locks the top-opening fixture 1 to the kerosene filling and draining valve 6.

[0031] like Figure 2 and 3 As shown, the ball lock mechanism includes a steel ball 3; the top-opening fixture 1 includes a steel ball mounting position 118; the retaining sleeve 4 includes a steel ball working position 412; the outer peripheral wall of the kerosene filling and releasing valve 6 has a groove; the steel ball 3 is placed in the steel ball working position 412, and the fixing nut 2 is rotated, causing the fixing nut 2 to move relative to the top-opening fixture 1 towards the retaining sleeve 4. The fixing nut 2 pushes the retaining sleeve 4, causing the steel ball 3 to move downward. When the steel ball 3 reaches the steel ball mounting position 118, the steel ball 3 moves from the steel ball working position 412 into the steel ball mounting position 118 and the groove on the outer peripheral wall of the kerosene filling and releasing valve 6, and the steel ball 3 enters the fixed position, achieving the effect of fixing the kerosene filling and releasing valve 6 and the top-opening fixture 1. The ball lock mechanism realizes the quick connection and locking of the top-opening fixture 1 and the kerosene filling and releasing valve 6.

[0032] It is understandable that the ferrule 4 can move up and down. When the ferrule 4 moves up and down relative to the top opening fixture 1, the ferrule 4 pushes the steel ball 3 to move radially (up and down) relative to the top opening fixture 1 to achieve a locking connection between the top opening fixture 1 and the kerosene filling and draining valve 6.

[0033] like Figure 2-5 As shown, the top-opening fixture 1 includes a lower base 117, a screw handwheel mechanism, and a push rod mechanism 124; the lower base 117 is connected to the kerosene filling and releasing valve 6. The screw handwheel mechanism is vertically mounted on the lower base 117, with its bottom extending into the lower base 117; the push rod mechanism 124 is located at the bottom end of the screw handwheel mechanism and is correspondingly positioned above the valve core 611 of the kerosene filling and releasing valve 6; the screw handwheel mechanism is used to drive the push rod mechanism 124 to move towards the valve core 611 of the kerosene filling and releasing valve 6 to open the valve of the kerosene filling and releasing valve 6.

[0034] like Figure 2-5As shown, the lower base 117 is cylindrical. A retaining ring groove 119 is provided on the outer circumferential wall of the bottom of the lower base 117 for installing the retaining ring 5. Multiple steel ball mounting positions 118 are arranged in a circular array around the middle of the outer cylinder of the lower base 117 for installing steel balls 3. The top of the outer cylinder of the lower base 117 is provided with mounting threads for installing and fixing nuts 2.

[0035] like Figure 2-5 As shown, the lead screw handwheel mechanism includes: a handwheel 111, a lead screw 121, a guide rod 115, and a slider 114; the handwheel 111 is fixedly connected to the lead screw 121; the guide rod 115 is arranged parallel to the lead screw 121 on its side; the slider 114 is threadedly connected to the lead screw 121, and the slider 114 is sleeved on the guide rod 115; the push rod mechanism 124 is fixedly connected to the slider 114; rotating the handwheel 111 causes the lead screw 121 to rotate, and the slider 114 moves along the length of the lead screw 121, driving the push rod mechanism 124 to move toward or away from the valve core 611 of the kerosene filling and releasing valve 6. The lead screw handwheel mechanism simplifies the components so that they can be easily disassembled and moved.

[0036] like Figure 2-6 As shown, the push rod mechanism 124 includes: a push rod fixing plate, a push rod center rod 132, and a conical push rod surface 131; the push rod center rod 132 is cylindrical, and the push rod fixing plate and the conical push rod surface 131 are respectively fixedly connected to the two ends of the push rod center rod 132; the push rod fixing plate is fixedly connected to the slider 114; the conical push rod surface 131 is disposed above the valve core 611 of the kerosene filling and draining valve 6.

[0037] like Figure 1-6 As shown, the push rod fixing plate includes a first push rod fixing plate 127 and a second push rod fixing plate 129. The first push rod fixing plate 127 and the second push rod fixing plate 129 are respectively fixed on both sides of the slider 114. The first push rod fixing plate 127 and the second push rod fixing plate 129 are provided with a plurality of push rod fixing plate mounting positions 130 in an array, which are used to install the first push rod fixing plate 127 and the second push rod fixing plate 129.

[0038] Preferably, a scale 116 is provided on the outer side of the first push rod fixing plate 127. The scale 116 moves with the first push rod fixing plate 127 and the slider 114. By observing the reading on the scale 116 corresponding to the top surface of the lower base 117 when the slider 114 is not moving and after it moves, the distance moved by the slider 114 can be obtained, and thus the downward movement distance of the push rod mechanism 124 can be obtained.

[0039] In a preferred embodiment of the present invention, the lower base 117 is provided with mounting positions for the guide rod 115 and the lead screw, and the mounting positions for the guide rod 115 and the lead screw are used to install the guide rod 115 and the lead screw.

[0040] like Figure 1-5 As shown, the lower base 117 has a fixing hole for the support plate 113 at its top. The support plate 113 is fixedly connected to the lower base 117; the support plate 113 is set perpendicular to the lower base 117, and the lower fixing bolt 126 passes through the lower base 117 to fix the support plate 113 to the lower base 117. The upper top plate 112 is fixedly connected to the top of the support plate 113, and the upper fixing bolt 125 fixes the upper top plate 112 to the top of the support plate 113; the upper top plate 112 is provided with a screw mounting position for mounting the screw rod 121 and a guide rod mounting position for mounting the guide rod 115.

[0041] In a preferred embodiment of the present invention, the slider 114 has a mounting hole on its side, and the top rod fixing bolt 128 passes through the top rod fixing plate to fix the top rod fixing plate in the mounting hole of the slider 114. This allows the top rod fixing plate and the slider 114 to move synchronously.

[0042] like Figure 5 As shown, a first bearing 122 is provided between the lead screw 121 and the upper top plate 112, and a second bearing 123 is provided between the lead screw 121 and the lower base 117. The first bearing 122 and the second bearing 123 transform the sliding friction between the lead screw 121 and the upper top plate 112 and the lower base 117 into rolling friction, making handwheel operation easier, the top rod positioning more accurate, and the device lifespan longer. Furthermore, it enables maintenance-free repeated use in kerosene environments, which is a key guarantee for the overall reliability and reusability of the machine.

[0043] like Figure 1 and 2 As shown, the top of the lower base 117 has an opening 120; the opening 120 serves as an observation window for observing the movement of the valve core 611. A scale 116 is provided on the side wall of the push rod fixing plate. During the valve opening action, the movement of the valve core 611 is observed, and the opening distance is quantified by matching the scale 116.

[0044] like Figure 2-5 As shown, the outer peripheral wall of the lower base 117 is provided with a plurality of steel ball mounting positions 118; the sleeve 4 includes a plurality of steel ball working positions 412; the plurality of steel ball working positions 412 are correspondingly arranged with the plurality of steel ball mounting positions 118; the steel ball 3 includes a plurality of steel balls, and the plurality of steel balls 3 are respectively arranged in the plurality of steel ball working positions 412.

[0045] like Figure 3As shown, the ferrule 4 is annular; the outer circumferential wall of the ferrule 4 top is evenly distributed with wrench slots 411. The annular ferrule 4 itself can evenly push the steel ball 3 360° circumferentially; 4 to 6 wrench slots 411 are directly milled into the top, eliminating the need for a large nut, and the outer diameter can be reduced by 15% to 20% compared to a traditional hexagonal nut, which makes up for the originally tight radial space on the rocket body. The evenly distributed wrench slots 411 allow open-end wrenches or hook wrenches to be engaged from any angle, and the circumferential force is uniform during rotation.

[0046] like Figure 4 As shown, the retaining ring 5 has a retaining ring opening 511, which facilitates the installation of the retaining ring 5 within the retaining ring groove 119. The retaining ring 5 is an axial limiting component, which limits the lower position of the steel ball 3 and prevents the steel ball 3 from falling out of the steel ball working position 412. The retaining ring 5 prevents the steel ball 3 from slipping out from the bottom under gravity or vibration, thus preventing locking failure. This ensures reliable operation of the ball lock mechanism.

[0047] like Figure 5 As shown, a spring 612 is fitted around the outer periphery of the valve core 611, and an end cap 613 is provided at the bottom of the spring 612. The spring 612 always provides a preload force to the valve core 611; when the push rod mechanism 124 is removed, the valve core immediately returns to its seat, cutting off the kerosene passage and improving safety. If the spring stiffness is known, the tester can calculate the opening force based on the spring compression, and reversely verify whether the valve core is stuck or aging, achieving quantitative testing. After the end cap 613 is screwed into the valve body, it provides a rigid support surface for the spring.

[0048] The installation method of the top-opening device for the kerosene filling and draining valve according to this application is as follows: Place the retaining ring 5 in the retaining ring groove 119 of the top-opening fixture 1, then place the top-opening fixture 1 at the inlet position of the kerosene filling and draining valve 6, place the steel ball 3 in the steel ball working position 412 of the sleeve 4, and then install and screw in the fixing nut 2. As the fixing nut 2 is screwed in, the steel ball 3 slides into the steel ball mounting position 118, and the steel ball 3 fixes the top-opening fixture 1 to the kerosene filling and draining valve 6.

[0049] The detection method for the top-opening device of the kerosene filling and draining valve of this application is as follows: rotate the handwheel 111 to drive the top rod mechanism 124 to contact the valve core 611 and open the valve. Observe the movement of the valve core 611 through the movable port 120. Record the maximum and minimum stroke of the valve core 611 through the scale 116. Rotate the handwheel 111 in the opposite direction to complete the valve action check.

[0050] The beneficial effects achieved by this application are as follows:

[0051] (1) The opening fixture of this application has a simple structure. By rotating the handwheel, the push rod mechanism is driven to contact the valve core and open the valve, thus realizing the reliability of the opening action.

[0052] (2) The ball lock mechanism of this application is matched with the top opening tooling, and the locking effect is achieved by moving the steel ball to the working position of the steel ball.

[0053] (3) This application provides an movable port on the lower base and a scale on the side wall of the top rod fixing plate. The valve core movement is observed through the movable port, and the maximum and minimum strokes of the valve core are recorded through the scale to quantify the opening effect and observe the opening effect and opening form.

[0054] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0055] In the description of this application, the word "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0056] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A top-opening device for a kerosene filling and draining valve, characterized in that, The device includes: a top-opening fixture, a fixing nut, a ball lock mechanism, a ferrule, and a retaining ring; The top-opening fixture is located at the inlet position of the kerosene filling and draining valve; The ferrule is fitted onto the bottom outer wall of the top-opening fixture; The ball locking mechanism is disposed between the outer wall of the sleeve and the top opening tooling; The retaining ring is disposed in the retaining ring groove on the outer peripheral wall of the bottom end of the top opening tooling; The fixing nut is threaded to the outer wall of the top-opening tool, and the fixing nut is located above the ferrule; Rotate the fixing nut so that it moves relative to the top opening fixture toward the ferrule, and the ball locking mechanism locks the top opening fixture to the kerosene filling and draining valve.

2. The top-opening device for a kerosene filling and draining valve according to claim 1, characterized in that, The ball lock mechanism includes steel balls; The top-opening fixture includes a steel ball mounting position; The ferrule includes a ball bearing working position; The outer peripheral wall of the kerosene filling and draining valve has a groove; The steel ball is placed in the working position, and the fixing nut is rotated so that the fixing nut moves relative to the top opening tool towards the sleeve, and the steel ball enters the steel ball mounting position and the groove from the working position.

3. The top-opening device for a kerosene filling and draining valve according to claim 2, characterized in that, The top-opening fixture includes a lower base, a lead screw handwheel mechanism, and a top rod mechanism; The lead screw handwheel mechanism is vertically mounted on the lower base, and the bottom of the lead screw handwheel mechanism extends into the lower base; The push rod mechanism is located at the bottom end of the lead screw handwheel mechanism, and the push rod mechanism is correspondingly located above the valve core of the kerosene filling and releasing valve; The lead screw handwheel mechanism is used to drive the push rod mechanism to move toward the valve core of the kerosene filling and draining valve, so as to open the valve of the kerosene filling and draining valve.

4. The top-opening device for a kerosene filling and draining valve according to claim 3, characterized in that, The lead screw handwheel mechanism includes: a handwheel, a lead screw, a guide rod, and a slider; The handwheel is fixedly connected to the lead screw; The guide rod is arranged parallel to the lead screw on the side of the lead screw; The slider is threadedly connected to the lead screw, and the slider is sleeved on the guide rod; The push rod mechanism is fixedly connected to the slider; When the handwheel is turned, the lead screw rotates, and the slider moves along the length of the lead screw. The slider drives the push rod mechanism to move toward or away from the valve core of the kerosene filling and draining valve.

5. The top-opening device for a kerosene filling and draining valve according to claim 4, characterized in that, The push rod mechanism includes: a push rod fixing plate, a push rod center rod, and a conical push rod surface; The top rod fixing plate and the tapered top rod surface are respectively fixedly connected to both ends of the top rod center rod; The top rod fixing plate is fixedly connected to the slider; The conical push rod surface is positioned above the valve core of the kerosene filling and draining valve.

6. The top-opening device for a kerosene filling and draining valve according to claim 4, characterized in that, A support plate is fixedly connected to the lower base; The support plate is arranged perpendicular to the lower base; The top plate is fixedly connected to the top of the support plate; The upper top plate is provided with a lead screw mounting position for installing the lead screw and a guide rod mounting position for installing the guide rod.

7. The top-opening device for a kerosene filling and draining valve according to claim 3, characterized in that, The top of the lower base has an opening for movement; The movable port is used to observe the movement of the valve core.

8. The top-opening device for a kerosene filling and draining valve according to claim 3, characterized in that, The outer peripheral wall of the lower base is provided with multiple steel ball mounting positions; The ferrule includes multiple ball bearing positions; Multiple steel ball working positions are correspondingly provided with multiple steel ball mounting positions; The steel balls include multiple steel balls, which are respectively arranged in multiple steel ball working positions.

9. The top-opening device for a kerosene filling and draining valve according to claim 5, characterized in that, A scale is provided on the side wall of the top rod fixing plate.

10. The top-opening device for a kerosene filling and draining valve according to claim 5, characterized in that, The sleeve is circular in shape; The outer peripheral wall at the top of the ferrule is evenly distributed with wrench positions.

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