A nozzle test device for locomotive wheel rim lubrication

Abstract

The present invention relates to the field of nozzle production technology, and more specifically, it relates to a nozzle testing device for locomotive wheel rim lubrication, comprising a body, a carrier frame and a back plate fixedly mounted on the top of the body and distributed front and back, a slide material placement unit for supporting and feeding the nozzle is arranged on the front side of the back plate, and a triangular force-stabilizing sealing unit and a follow-up liquid spraying unit are arranged on the inner side of the carrier frame. In the present invention, three seals are synchronously inserted into the three openings of the nozzle, and the triangular fixed structure formed between the three seals effectively enhances the sealing stability. Even if the test process encounters external forces such as test gas pressure fluctuations and the device's own vibrations, the relative positions between the seals are still stable, and can always fit tightly to the openings to prevent gas leakage, thereby ensuring the reliability of the sealing effect during the test. When the test pressure changes and generates a reaction force, the displacement of the nozzle in all directions can be limited, so that the nozzle can always remain stable during the entire test process.

Description

Technical Field

[0001] The invention relates to the technical field of nozzle production, and more particularly to a nozzle testing device for lubricating a locomotive wheel rim. Background Art

[0002] Wheel rim grease sprayer is a device used to lubricate locomotive wheel rims, aiming to reduce friction and loss between locomotive wheel rims and rails. It usually uses speed sensing condition shaping integration, the speed motor provides the locomotive operating conditions, the grease spray controller converts the speed conditions and outputs the grease spray conditions, and works in a fixed-distance grease spraying manner. The main components include grease spray controller, grease storage tank, nozzle, etc.

[0003] The production process of locomotive wheel rim grease sprayer generally includes: controller manufacturing, tank processing, nozzle production, pre-assembly inspection, overall assembly and debugging inspection. Among them, after the assembly is completed, the grease sprayer as a whole including the nozzle needs to be tested for air tightness. In the current test of the locomotive wheel rim lubrication nozzle, a rubber ring sealing method is mostly used. The rubber ring is put on each opening of the nozzle, and then a certain pressure is applied through an external clamp to make the rubber ring contact with the inner wall of the opening to achieve sealing. When performing a pressure test, the sealed nozzle is connected to the pressure test equipment, and a certain pressure of gas is filled into the nozzle to observe whether there is gas leakage, but this test method still has certain defects: 1. At present, a rigid connection sealing method is used in the test process. For example, the seal is directly fixed at the nozzle opening using a fixed bracket or a clamp. Each seal is independent of each other. Therefore, when the test gas pressure fluctuates, due to the lack of a way to disperse the pressure and the structure that cannot effectively transmit and disperse the force, the pressure borne by the seal will directly act on the contact part with the nozzle. Once the pressure exceeds the sealing limit between the seal and the nozzle, it will cause gas leakage. Under high-pressure test conditions, the seal is easily failed due to pressure concentration, and the sealing stability during the test cannot be guaranteed, thereby affecting the accuracy of the test results and it is difficult to truly reflect the airtight performance of the nozzle.

[0004] 2. At present, during the test process, soapy water is sprayed to determine the leakage point. The leakage is mainly determined by observing whether bubbles are generated. For extremely small leaks, the bubbles generated may be very small or even difficult to detect, and it is easy to miss the detection. Especially when the leakage amount is extremely small, the bubbles may burst soon after they are formed, making it even more difficult for the inspectors to detect it in time. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a nozzle testing device for locomotive wheel rim lubrication, comprising a body, a carrier frame and a back plate fixedly installed on the top of the body and distributed front and back, a slide material placement unit for supporting and feeding the nozzle is arranged on the front side of the back plate, a triangular stabilizing sealing unit and a follow-up liquid spraying unit are arranged on the inner side of the carrier frame, the triangular stabilizing sealing unit comprises a multi-point sealing component and a control component for driving the multi-point sealing component, and the follow-up liquid spraying unit comprises a liquid spraying component for spraying phenolphthalein reagent to the nozzle opening to determine the leakage point.

[0006] The multi-point sealing assembly includes three pairs of guide rods respectively fixedly mounted on the front, middle and rear inner walls of the carrier frame, a circular plate is provided at the bottom of the guide rods, a single pair of guide rods are symmetrical between the left and right, a movable plate is slidably mounted on the outer side of the single pair of guide rods, a hinge frame is fixedly mounted on the bottom of the middle movable plate through two driving rods, a connecting rod is hinged between the two ends of the hinge frame and the other two movable plates, a sealing member is fixedly mounted on the side of the movable plate away from the carrier frame through a mounting rod, and the sealing member is located between the left and right opposite connecting rods; the control member is fixedly mounted on the middle top of the carrier frame, and the output end of the control member is fixedly connected to the movable plate located in the middle. A sealing positioning cone is provided on the top of the body, and the bottom end of the nozzle is inserted into the sealing positioning cone for sealing positioning during testing.

[0007] Furthermore, the slide loading unit includes a loading assembly for supporting and limiting the nozzle and a slide assembly for controlling the horizontal movement and feeding of the loading assembly. The loading assembly includes a plurality of L-shaped brackets fixedly mounted on the front side of the slide assembly and used to support the nozzle. The plurality of brackets are arranged horizontally and linearly, and an opening is provided at the bottom of the bracket. When the nozzle is placed, the oil outlet at the bottom of the nozzle passes through the opening and is supported by the bracket.

[0008] Furthermore, two clamps are fixedly installed on the front side of the bracket, which are distributed up and down and are used to clamp and fix the nozzle. The three openings opened on the outside of the nozzle are respectively the oil return port at the top, the oil pipe and the air duct on the front side and distributed up and down. Two left-right symmetrical baffle bars are fixedly installed on the top of the horizontal section of the bracket. When placing the nozzle, the air duct is placed between the two baffle bars to limit the nozzle circumferentially.

[0009] Furthermore, the liquid spray assembly includes a liquid tank fixedly mounted on the inner wall of the rear portion of the carrier frame, the interior of the liquid tank being divided into a liquid spray chamber and a liquid storage chamber distributed on the left and right by a partition, a liquid outlet pipe and a liquid suction pipe distributed front and back being fixedly mounted on the left side of the liquid tank, one end of the liquid suction pipe being connected to the liquid spray chamber and the other end being connected to the liquid storage chamber, one end of the liquid outlet pipe being connected to the liquid spray chamber and the other end being fixedly mounted with a shunt pipe.

[0010] Furthermore, two symmetrical liquid spray pipes are fixedly installed at the bottom end of the diversion pipe, and three nozzles are fixedly installed on the adjacent sides of the two liquid spray pipes. The three nozzles are respectively aimed at the three openings of the nozzle. Before the test, the nozzles spray phenolphthalein reagent to the openings. During the test, ammonia gas is flushed into the nozzle. If the ammonia gas leaks, it will react with the phenolphthalein reagent, causing the phenolphthalein reagent to turn red to determine the leakage point.

[0011] Furthermore, the follower liquid spraying unit also includes a follower assembly and two support sleeves fixedly installed on the bottom of the liquid tank, and the two support sleeves are fixedly sleeved on the outside of the liquid outlet pipe.

[0012] Furthermore, a folding hose is provided on the upper part of the vertical section of the liquid outlet pipe on the right side of the support sleeve, and an installation sleeve is provided on the outside of the liquid outlet pipe and below the folding hose, and an electric push rod is fixedly installed between the installation sleeve and the liquid tank.

[0013] Furthermore, the follower assembly includes a return spring fixedly installed on the bottom of the liquid tank, a return plate fixedly installed on the bottom end of the return spring, a sliding rod fixedly installed on the top of the reset plate that slides through the inner wall of the bottom of the liquid tank and extends into the spray chamber, and a sealing plate fixedly installed on the top of the sliding rod that is slidably connected to the inner wall of the spray chamber.

[0014] Furthermore, a pressure plate is fixedly installed on the rear side of the movable plate corresponding to the rear of the carrier frame through an L-shaped rod. The pressure plate is located on the top of the reset plate and is used to press the reset plate to move the sealing plate downward and squeeze out the phenolphthalein reagent in the spray chamber.

[0015] The beneficial effects of the present invention are: 1. In the present invention, three seals are synchronously inserted into the three openings of the nozzle, and the triangular fixed structure formed between the three seals effectively enhances the sealing stability. Even if the test process encounters external forces such as test gas pressure fluctuations and the device's own vibrations, the relative positions of the seals are still stable, and they can always fit tightly to the openings to prevent gas leakage, thereby ensuring the reliability of the sealing effect during the test and ensuring that the test is carried out in a stable sealing environment. When the test pressure changes and generates a reaction force, the displacement of the nozzle in all directions can be limited, so that the nozzle remains stable throughout the entire test process, providing a stable foundation for precise testing, avoiding test errors caused by nozzle shaking, and ensuring that the test results truly reflect the airtightness performance of the nozzle.

[0016] 2. In the present invention, the multi-point sealing assembly adopts a linkage structure of a connecting rod and an articulated frame to achieve synchronous movement of three sealing parts. This synchronization makes the sealing operation more efficient, avoids the risk of leakage caused by asynchronous sealing, greatly shortens the time required for sealing, improves test efficiency, and saves time for subsequent testing links by quickly completing the sealing of the nozzle.

[0017] 3. In the present invention, when there is a leak in the nozzle, since ammonia has good diffusivity, the entire detection area can be detected in a short time. Therefore, the leaked ammonia will quickly react with the phenolphthalein reagent pre-sprayed at the opening, causing the phenolphthalein reagent to turn red. This color change can intuitively and accurately indicate the location of the leak point.

[0018] 4. In the present invention, the liquid spraying assembly is linked with the triangular stabilizing sealing unit. When the sealing unit is working, the liquid spraying action is automatically triggered without additional manual operation, thus realizing the automation of the test process, which not only improves the test efficiency, but also reduces the errors that may be caused by manual operation, making the test process more standardized and normalized, and by pre-spraying phenolphthalein reagent at the nozzle opening, the chemical reaction of ammonia and phenolphthalein reagent can be used to intuitively and accurately determine the location of the leakage point. Compared with the detection method of observing whether bubbles are generated, this method has a clearer and more definite characterization, greatly improves the accuracy of the detection, helps to quickly discover the sealing problem of the nozzle, and provides an accurate basis for subsequent maintenance and improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a partial three-dimensional structural schematic diagram of the triangular force-stabilizing sealing unit, the supporting frame, the machine body and the sealing positioning cone of the present invention.

[0021] Figure 3 It is a partial three-dimensional structural schematic diagram of the back plate, nozzle, bracket, clamp and baffle rod of the present invention.

[0022] Figure 4 It is a partial three-dimensional structural schematic diagram of the follow-up liquid spraying unit, the carrier frame, the nozzle, the connecting rod and the back plate of the present invention.

[0023] Figure 5 It is a partial three-dimensional structural schematic diagram of the control member, the driving rod, the articulated frame, the connecting rod and the mounting rod of the present invention.

[0024] Figure 6 It is a partial three-dimensional structural schematic diagram of the liquid box, liquid storage chamber, liquid spray chamber, liquid extraction pipe and liquid outlet pipe of the present invention.

[0025] Figure 7 It is a diagram showing the changing states of the multi-point sealing assembly of the present invention.

[0026] Figure 8 It is a partial three-dimensional structural schematic diagram of the reset spring, reset plate, slide rod and pressure plate of the present invention.

[0027] In the figure: 1, body; 2, back plate; 3, carrier; 4, slide loading unit; 5, triangular stabilizing sealing unit; 6, follow-up spray unit; 7, nozzle; 8, sealing positioning cone; 401, slide assembly; 402, loading assembly; 4021, bracket; 4022, clamp; 4023, stop rod; 501, multi-point sealing assembly; 502, control part; 5011, guide rod; 5012, moving plate; 5013, driving rod; 5014, articulated frame; 5015, connecting rod; 5016, connecting rod; 5017, connecting rod; 5018, connecting rod; 5019, connecting rod; 5020, connecting rod; 5021, connecting rod; 5022, connecting rod; 5023, connecting rod; 5024, connecting rod; 5025, connecting rod; 5026, connecting rod; 5027, connecting rod; 5028, connecting rod; 5029, connecting rod; 5030, connecting rod; 5031, connecting rod; 5032, connecting rod; 5033, connecting rod; 5034, connecting rod; 5035, connecting rod; 5036, connecting rod; 5037, connecting rod; 5038, connecting rod; 5039, connecting rod; 5040, connecting rod; 5041, connecting rod; 5042, connecting rod; 5043, connecting rod; 5044, connecting rod; 5045, connecting rod; 5046, connecting rod; 5047, connecting rod; 5048, connecting rod; 5049, connecting rod; 5050, connecting rod; 5051, connecting rod; 5052, connecting rod; 5053, connecting rod; 5 016, mounting rod; 5017, sealing element; 601, liquid spraying assembly; 602, follow-up assembly; 603, supporting sleeve; 6011, liquid tank; 6012, liquid storage chamber; 6013, liquid spraying chamber; 6014, liquid extraction pipe; 6015, liquid outlet pipe; 6016, shunt pipe; 6017, liquid spraying pipe; 6018, mounting sleeve; 6019, electric push rod; 6021, reset spring; 6022, reset plate; 6023, sliding rod; 6024, sealing plate; 6025, pressure plate. DETAILED DESCRIPTION

[0028] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0029] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 In this embodiment, a nozzle testing device for locomotive wheel rim lubrication is proposed, comprising a body 1, a back plate 2 and a carrier 3 fixedly mounted on the top of the body 1 and distributed front and back, a slide material placement unit 4 for supporting and feeding a nozzle 7 is arranged on the front side of the back plate 2, a triangular stabilizing sealing unit 5 and a follow-up liquid spraying unit 6 are arranged on the inner side of the carrier 3, the triangular stabilizing sealing unit 5 comprises a multi-point sealing component 501 and a control component 502 for driving the multi-point sealing component 501, the follow-up liquid spraying unit 6 comprises a liquid spraying component 601 for spraying phenolphthalein reagent to the opening of the nozzle 7 to determine the leakage point, a sealing positioning cone 8 is arranged on the top of the body 1, and the bottom end of the nozzle 7 is inserted into the sealing positioning cone 8 for sealing positioning during testing.

[0030] It should be noted that the sealing positioning cone 8 can be driven by an external cylinder to move up and down to avoid the feeding of the nozzle 7. The carrier frame 3 is composed of a vertical section (i.e., the front side) fixedly connected to the body 1, a horizontal section (i.e., the rear side) fixedly connected to the back plate 2, and an inclined section (i.e., the middle section) fixedly connected between the vertical section and the horizontal section. The carrier frame 3 is erected above the slide material placement unit 4, and the follow-up spray unit 6 is arranged at the bottom of the horizontal section of the carrier frame 3.

[0031] See also Figure 1 , Figure 3 and Figure 4 The slide loading unit 4 includes a loading assembly 402 for supporting and limiting the nozzle 7 and a slide assembly 401 for controlling the horizontal movement and feeding of the loading assembly 402. The loading assembly 402 includes a plurality of L-shaped brackets 4021 fixedly mounted on the front side of the slide assembly 401 and used to support the nozzle 7. The plurality of brackets 4021 are arranged horizontally and linearly, and an opening is provided at the bottom of the bracket 4021. When the nozzle 7 is placed, the oil outlet at the bottom of the nozzle 7 passes through the opening and is supported by the bracket 4021.

[0032] See also Figure 3 The front side of the bracket 4021 is fixedly installed with two clamps 4022 distributed up and down and used to clamp and fix the nozzle 7. The three openings opened on the outside of the nozzle 7 are respectively the oil return port at the top, the oil pipe and the air duct distributed up and down on the front side. Two left-right symmetrical blocking rods 4023 are fixedly installed on the top of the horizontal section of the bracket 4021. When placing the nozzle 7, the air duct is placed between the two blocking rods 4023 to limit the nozzle 7 circumferentially.

[0033] See also Figure 1-Figure 4 During specific use, in the test preparation stage, the operator places the nozzle 7 to be tested on the material placement assembly 402 of the slide material placement unit 4 for fixation. Specifically: the oil outlet at the bottom of the nozzle 7 passes through the opening at the bottom of the bracket 4021 and is supported by the bracket 4021 to achieve initial support for the nozzle 7. Then, the two clamps 4022 distributed up and down on the front side of the bracket 4021 are used to clamp and fix the nozzle 7 to initially limit its horizontal movement. At the same time, the air duct of the nozzle 7 is placed between the two left-right symmetrical blocking rods 4023 to complete the circumferential limit of the nozzle 7. At this point, the nozzle 7 is accurately fixed and positioned on the material placement assembly 402. After the positioning is completed, the slide assembly 401 is started to control the material placement assembly 402 to move horizontally and feed to the right.

[0034] During feeding, the external cylinder receives the control signal and drives the sealing positioning cone 8 to move downward. In this way, the sealing positioning cone 8 will not hinder the horizontal feeding of the nozzle 7, and the slide loading unit 4 can smoothly send the nozzle 7 to the bottom of the test position (that is, when the oil outlet of the nozzle is facing the center of the sealing positioning cone 8). At this time, the external cylinder acts again to drive the sealing positioning cone 8 to move upward until the bottom end of the nozzle 7 is inserted into the sealing positioning cone 8, thereby realizing the sealing positioning of the oil outlet of the nozzle 7.

[0035] See also Figure 2 , Figure 4 , Figure 5 and Figure 7 The multi-point sealing assembly 501 includes three pairs of guide rods 5011 respectively fixedly mounted on the inner walls of the vertical section, the inclined section and the horizontal section of the carrier frame 3. A circular plate is provided at the bottom end of the guide rods 5011. The single pair of guide rods 5011 are symmetrical with each other. A movable plate 5012 is slidably mounted on the outer side of the single pair of guide rods 5011. The guide rods 5011 guide the movable plate 5012 during its movement, limiting the movement trajectory of the movable plate 5012 so that the movable plate 5012 can only slide along a fixed direction. The circular plate at the bottom supports and limits the movable plate 5012 to prevent it from falling off or deviating during its movement. A hinged frame 5014 is fixedly installed at the bottom of the movable plate 5012 of the inclined section of the supporting frame 3 through two driving rods 5013, and the driving rod 5013 is located between the corresponding pair of guide rods 5011. The two ends of the hinged frame 5014 are hinged with connecting rods 5015 between the other two movable plates 5012. A sealing member 5017 is fixedly installed on the side of the movable plate 5012 away from the supporting frame 3 through a mounting rod 5016. The sealing member 5017 is located between the left and right opposite connecting rods 5015. The control member 502 is fixedly installed on the top of the inclined section of the supporting frame 3, and the output end of the control member 502 is fixedly connected to the movable plate 5012 of the inclined section of the corresponding supporting frame 3.

[0036] It should be noted that the control component 502 can adopt a conventional cylinder or an electric telescopic rod, and a one-way air intake gas channel is provided in the sealing component 5017 (opening a gas channel in the sealing component 5017 is common knowledge for those skilled in the art, so it is not repeated in the present invention), and the one-way air intake gas channel can be connected to an external air source.

[0037] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7After the positioning and feeding of the nozzle 7 are completed, the control member 502 outputs a driving force. Since the output end of the control member 502 is fixedly connected to the moving plate 5012 located in the middle, the power generated by the control member 502 directly acts on the middle moving plate 5012, pushing it to slide along the extension direction of the corresponding guide rod 5011. When the middle moving plate 5012 slides on the corresponding guide rod 5011, it will drive the driving rod 5013 to move synchronously, thereby driving the articulated frame 5014 to move. Since the two ends of the articulated frame 5014 are respectively connected to the other two moving plates 5012 through the connecting rod 5 The hinged frame 5014 is hinged with the other two movable plates 5012. This hinged structure allows the hinged frame 5014 to move, through the connecting rod 5015, to drive the other two movable plates 5012 to move synchronously along the corresponding guide rods 5011 to approach the nozzle 7. Since the side of each movable plate 5012 away from the carrier frame 3 is fixedly mounted with a sealing member 5017 through a mounting rod 5016, as the three movable plates 5012 synchronously approach the nozzle 7 under the drive of the control member 502, the sealing member 5017 also gradually approaches and is finally inserted into the three openings of the nozzle 7 (the movement change process of the multi-point sealing assembly 501 is shown in FIG. Figure 7 As shown in the figure, the shape and size of the sealing member 5017 are matched with the opening corresponding to the nozzle 7, and can fit tightly against the inner wall of the opening, thereby realizing effective sealing of the nozzle 7. At the same time, since the three sealing members 5017 are interconnected by structures such as the connecting rod 5015 and the articulated frame 5014, a stable triangular fixed structure is formed. This triangular structure has good stability and rigidity, and can effectively resist the external force that may be generated during the test, thereby further ensuring the reliability of the seal and preventing the nozzle 7 from shaking or leaking during the test.

[0038] Explanation of the triangular fixed structure in the present invention: Three sides (connecting rods 5015): In the multi-point sealing assembly 501, the connecting rods 5015 are connected to different movable plates 5012. When the control component 502 drives the middle movable plate 5012 to move, the driving rod 5013 drives the articulated frame 5014, and then the connecting rods 5015 push the other two movable plates 5012 to move synchronously. During the test, if there is an external force, such as the impact force generated by the change in the test gas pressure, these connecting rods 5015 are like the sides of the triangle, dispersing the force to each movable plate 5012. When the internal pressure of the nozzle 7 suddenly increases, the connecting rod 5015 will disperse the force generated by this pressure to the movable plate 5012 connected to it, so as to prevent a single movable plate 5012 from being subjected to excessive pressure, which may cause the displacement of the seal 5017 or the failure of the seal.

[0039] Three corners (at the hinged structure): The three corners in the present invention are located at the connection points between the hinged frame 5014 and the connecting rod 5015, and between the connecting rod 5015 and the movable plate 5012. When subjected to external force, these corner structures can transmit and disperse the force in different directions. Taking one of the corners as an example, when the position of this corner is subjected to external force, it will transmit part of the force along the connecting rod 5015 to the adjacent movable plate 5012, and the other part will be transmitted to other connecting parts through the hinged frame 5014. If vibration occurs during the test, these corner structures can disperse the external force generated by the vibration into the entire triangular fixed structure, maintain the close fit between the seal 5017 and the opening of the nozzle 7, and ensure the sealing effect and the accuracy of the test.

[0040] See also Figure 4 and Figure 6 The liquid spraying assembly 601 includes a liquid tank 6011 fixedly installed at the bottom of the horizontal section of the support frame 3. The interior of the liquid tank 6011 is divided into a liquid spraying chamber 6013 and a liquid storage chamber 6012 distributed on the left and right by a partition. A liquid outlet pipe 6015 and a liquid suction pipe 6014 distributed front and back are fixedly installed on the left side of the liquid tank 6011. One end of the liquid suction pipe 6014 is connected to the liquid spraying chamber 6013, and the other end is connected to the liquid storage chamber 6012. One end of the liquid outlet pipe 6015 is connected to the liquid spraying chamber 6013, and the other end is fixedly installed with a shunt pipe 6016.

[0041] It should be noted that one-way valves are provided on the outsides of the liquid outlet pipe 6015 and the liquid extraction pipe 6014. The one-way valve on the liquid extraction pipe 6014 is a liquid inlet one-way valve, and the one-way valve on the liquid outlet pipe 6015 is a liquid outlet one-way valve.

[0042] See also Figure 4 , Figure 5 and Figure 6 Two symmetrical liquid spray pipes 6017 are fixedly installed at the bottom end of the shunt pipe 6016. Three nozzles are fixedly installed on the adjacent sides of the two liquid spray pipes 6017. The three nozzles are respectively aimed at the three openings of the nozzle 7. Before the test, the nozzles spray phenolphthalein reagent to the openings. During the test, any seal 5017 is connected to the external ammonia source, and ammonia is injected into the nozzle 7 through one of the seals 5017. If the ammonia leaks, it will react with the phenolphthalein reagent, causing the phenolphthalein reagent to turn red to determine the leakage point.

[0043] See also Figure 4 and Figure 6The follow-up liquid spraying unit 6 also includes a follow-up component 602 and two support sleeves 603 fixedly installed at the bottom of the liquid tank 6011. The two support sleeves 603 are fixedly sleeved on the outside of the liquid outlet pipe 6015. The liquid outlet pipe 6015 is provided with a folding hose on the upper part of the vertical section on the right side of the support sleeve 603. A mounting sleeve 6018 is fixedly sleeved on the outside of the liquid outlet pipe 6015 and below the folding hose. An electric push rod 6019 is fixedly installed between the mounting sleeve 6018 and the liquid tank 6011. The support sleeve 603 supports and fixes the liquid outlet pipe 6015 to ensure the stability of the liquid outlet pipe 6015 during operation.

[0044] See also Figure 4 , Figure 5 , Figure 6 and Figure 8 The following assembly 602 includes a reset spring 6021 fixedly mounted at the bottom of the liquid tank 6011, a reset plate 6022 fixedly mounted at the bottom of the reset spring 6021, a slide bar 6023 fixedly mounted on the top of the reset plate 6022, which slides through the inner wall of the bottom of the liquid tank 6011 and extends into the liquid spraying chamber 6013, a sealing plate 6024 slidably connected to the inner wall of the liquid spraying chamber 6013 fixedly mounted on the top of the slide bar 6023, a pressing plate 6025 fixedly mounted on the rear side of the moving plate 5012 corresponding to the horizontal section of the carrier 3 through an L-shaped rod, the pressing plate 6025 is located on the top of the reset plate 6022 and is used to press the reset plate 6022 to move the sealing plate 6024 downward, and squeeze out the phenolphthalein reagent in the liquid spraying chamber 6013. The vertical side walls of the sealing plate 6024 are in conflict with the corresponding inner wall of the liquid spraying chamber 6013.

[0045] See also Figure 1-Figure 8 Before the initial test, a sufficient amount of phenolphthalein reagent is stored in the liquid storage chamber 6012, and at the same time, the reset plate 6022 is pressed down by the pressing plate 6025 to perform a sealing dry operation of the nozzle 7, and then reset. During the reset process, the moving plate 5012 corresponding to the horizontal section of the carrier 3 drives the pressing plate 6025 away from the reset plate 6022. The reset spring 6021 rebounds upward and resets and pulls the reset plate 6022. The reset plate 6022 drives the sliding rod 6023 and the sealing plate 6024 to slide upward, and the sealing plate 6024 is reset to the upper side of the liquid spraying chamber 6013. When the sealing plate 6024 slides upward, negative pressure is generated in the liquid spraying chamber 6013. Because one end of the liquid extraction tube 6014 is connected to the liquid storage chamber 6012 and the other end is connected to the liquid spraying chamber 6013, and the one-way valve on the liquid extraction tube 6014 is a liquid inlet one-way valve, it only allows liquid to flow from the liquid storage chamber 6012 to the liquid spraying chamber 6013. Under the action of negative pressure, the phenolphthalein reagent stored in the liquid storage chamber 6012 is sucked into the liquid spraying chamber 6013 through the liquid extraction tube 6014, thereby completing the process of the phenolphthalein reagent entering the liquid spraying chamber 6013 from the liquid storage chamber 6012, and preparing for the formal test.

[0046] Then, the output end of the electric push rod 6019 is controlled to push the part of the liquid outlet pipe 6015 located below the folding hose to move downward, thereby driving the two liquid spray pipes 6017 to move downward through the diverter pipe 6016, so that the nozzle is aligned with the opening of the nozzle 7. Then, in the process of sealing the nozzle opening and triangularly fixing the nozzle, when the movable plate 5012 on the rear side moves downward, the L-shaped rod fixed on its rear side drives the pressure plate 6025 to move synchronously, and the pressure plate 6025 gradually approaches and squeezes the reset plate 6022. The reset plate 6022 moves downward under the action of pressure, and the downward movement of the reset plate 6022 will drive the sliding rod 6023 and the sealing plate 6024 to slide downward together. During the downward movement of the sealing plate 6024, the phenolphthalein reagent in the liquid spraying chamber 6013 is squeezed, and the compressed phenolphthalein reagent flows out through the liquid outlet pipe 6015, and the other end of the liquid outlet pipe 6015 is connected to the shunt pipe 6016, and the shunt pipe 6016 evenly distributes the phenolphthalein reagent to two symmetrical liquid spraying pipes 6017, and then the phenolphthalein reagent is accurately sprayed to the three openings of the nozzle 7 through the three nozzles on the liquid spraying pipe 6017, and after the spraying of the phenolphthalein reagent is completed, ammonia is rushed into the nozzle 7 for testing, and if there is a leakage in the nozzle 7, the leaked ammonia will react with the phenolphthalein reagent sprayed at the opening, so that the phenolphthalein reagent turns red. The operator can quickly and intuitively judge the leakage point of the nozzle 7 by observing whether the phenolphthalein reagent turns red and the position of the reddening.

[0047] It should be noted that the electric push rod 6019 fixedly installed between the mounting sleeve 6018 and the liquid tank 6011 can fine-tune the position of the liquid outlet pipe 6015 to better adapt to the testing requirements of different models of nozzles 7 and ensure that the nozzle can be accurately aligned with the opening of the nozzle 7.

[0048] After the test is completed, the sealing positioning cone 8 moves downward under the drive of the external cylinder, so that the slide material unit 4 can move the tested nozzle 7 out of the test area and feed the new nozzle 7 to be tested into the test area. At the same time, after the test is completed, the control component 502 performs a reverse action, and the middle movable plate 5012 slides in the opposite direction on the outside of the guide rod 5011. The reverse movement of the middle movable plate 5012 drives the articulated frame 5014 to move in the opposite direction through the driving rod 5013, thereby causing the connecting rod 5015 to pull the other two movable plates 5012 away from the nozzle 7 synchronously. Finally, the three sealing components 5017 withdraw from the opening of the nozzle 7, releasing the sealing state of the nozzle 7. This reset action restores the triangular stabilizing force sealing unit 5 to its initial position, preparing for the sealing operation of the next test.

[0049] At the same time, during the resetting process of the triangular stabilizing sealing unit 5, the rear moving plate 5012 drives the pressure plate 6025 away from the resetting plate 6022. At this time, the resetting spring 6021 resets upward and pulls the resetting plate 6022. The resetting plate 6022 drives the sliding rod 6023 and the sealing plate 6024 to slide upward, so that the sealing plate 6024 returns to the initial position of the spray chamber 6013. In this process, as the sealing plate 6024 slides upward, negative pressure is generated, and the phenolphthalein reagent stored in the liquid storage chamber 6012 is sucked into the spray chamber 6013 to prepare for the next test. At the same time, the output end of the electric push rod 6019 contracts, and the liquid outlet pipe 6015 is adjusted back to the initial position, avoiding the discharge of the nozzle 7 and the feeding of the next nozzle 7 to be tested, so as to avoid obstruction to the movement of the nozzle 7.

[0050] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A nozzle test device for locomotive wheel rim lubrication, comprising: A machine body (1), a back plate (2) fixedly mounted on the top of the machine body (1) and distributed front and back, and a carrier (3), characterized in that a slide material placement unit (4) for supporting and feeding a nozzle (7) is arranged on the front side of the back plate (2), and a triangular force-stabilizing sealing unit (5) and a follow-up liquid spraying unit (6) are arranged on the inner side of the carrier (3); The triangular force-stabilizing sealing unit (5) comprises a multi-point sealing component (501) and a control component (502) for driving the multi-point sealing component (501), and the follow-up liquid spraying unit (6) comprises a liquid spraying component (601) for spraying phenolphthalein reagent to the opening of the nozzle (7) to determine the leakage point; The multi-point sealing assembly (501) comprises three pairs of guide rods (5011) respectively fixedly mounted on the front, middle and rear inner walls of the support frame (3); a circular plate is provided at the bottom end of the guide rods (5011); a single pair of guide rods (5011) are symmetrical with each other; a movable plate (5012) is slidably mounted on the outer side of the single pair of guide rods (5011); a hinge frame (5014) is fixedly mounted on the bottom of the middle movable plate (5012) via two driving rods (5013); connecting rods (5015) are hingedly connected between the two ends of the hinge frame (5014) and the other two movable plates (5012); a sealing member (5017) is fixedly mounted on the side of the movable plate (5012) away from the support frame (3) via a mounting rod (5016); and the sealing member (5017) is located between the left and right opposing connecting rods (5015); The control member (502) is fixedly mounted on the top middle portion of the carrier frame (3), and the output end of the control member (502) is fixedly connected to a moving plate (5012) located in the middle portion; The control member (502) drives the three movable plates (5012) to synchronously approach the nozzle (7), so that the three sealing members (5017) are respectively inserted into the three openings of the nozzle (7) to implement sealing, and a stable triangular fixed structure is formed between the nozzle (7) and the three sealing members (5017) to prevent the nozzle (7) from shaking.

2. A nozzle testing device for locomotive wheel rim lubrication according to claim 1, characterized in that: The slide loading unit (4) comprises a loading assembly (402) for supporting and limiting the position of the nozzle (7) and a slide assembly (401) for controlling the horizontal movement and feeding of the loading assembly (402); the loading assembly (402) comprises a plurality of L-shaped brackets (4021) fixedly mounted on the front side of the slide assembly (401) and used for supporting the nozzle (7); the plurality of brackets (4021) are arranged horizontally and linearly; an opening is provided at the bottom of the bracket (4021); when the nozzle (7) is placed, the oil outlet at the bottom of the nozzle (7) passes through the opening and is supported by the bracket (4021).

3. A nozzle testing device for locomotive wheel rim lubrication according to claim 2, characterized in that: The front side of the bracket (4021) is fixedly mounted with two clamps (4022) which are distributed up and down and are used to clamp and fix the nozzle (7). The three openings opened on the outside of the nozzle (7) are respectively an oil return port at the top, an oil pipe and an air pipe which are distributed up and down at the front. Two left-right symmetrical blocking rods (4023) are fixedly mounted on the top of the horizontal section of the bracket (4021). When the nozzle (7) is placed, the air pipe is placed between the two blocking rods (4023) to limit the nozzle (7) in a circumferential direction.

4. A nozzle testing device for locomotive wheel rim lubrication according to claim 1, characterized in that: The liquid spraying assembly (601) comprises a liquid tank (6011) fixedly mounted on the inner wall of the rear portion of the carrier frame (3); the interior of the liquid tank (6011) is divided into a liquid spraying chamber (6013) and a liquid storage chamber (6012) distributed on the left and right by a partition; a liquid outlet pipe (6015) and a liquid extraction pipe (6014) distributed on the front and back are fixedly mounted on the left side of the liquid tank (6011); one end of the liquid extraction pipe (6014) is connected to the liquid spraying chamber (6013) and the other end is connected to the liquid storage chamber (6012); one end of the liquid outlet pipe (6015) is connected to the liquid spraying chamber (6013) and the other end is fixedly mounted with a shunt pipe (6016).

5. A nozzle testing device for locomotive wheel rim lubrication according to claim 4, characterized in that: Two symmetrical liquid spray pipes (6017) are fixedly installed at the bottom end of the diverter pipe (6016). Three spray heads are fixedly installed on the adjacent sides of the two liquid spray pipes (6017). The three spray heads are respectively aimed at the three openings of the nozzle (7). Before the test, the spray heads spray phenolphthalein reagent to the openings. During the test, ammonia gas is injected into the nozzle (7). If the injected ammonia gas leaks, it will react with the phenolphthalein reagent, causing the phenolphthalein reagent to turn red so as to determine the leakage point.

6. A nozzle testing device for locomotive wheel rim lubrication according to claim 4, characterized in that: The follower liquid spraying unit (6) further comprises a follower assembly (602) and two support sleeves (603) fixedly mounted on the bottom of the liquid tank (6011), and the two support sleeves (603) are both fixedly mounted on the outside of the liquid outlet pipe (6015).

7. A nozzle testing device for locomotive wheel rim lubrication according to claim 6, characterized in that: The liquid outlet pipe (6015) is provided with a folding hose at the upper part of the vertical section on the right side of the support sleeve (603), and a mounting sleeve (6018) is fixedly provided on the outside of the liquid outlet pipe (6015) and below the folding hose, and an electric push rod (6019) is fixedly installed between the mounting sleeve (6018) and the liquid tank (6011).

8. A nozzle testing device for locomotive wheel rim lubrication according to claim 6, characterized in that: The follower assembly (602) comprises a return spring (6021) fixedly mounted at the bottom of the liquid tank (6011); a return plate (6022) is fixedly mounted at the bottom end of the return spring (6021); a slide bar (6023) is fixedly mounted on the top of the return plate (6022) and slides through the inner wall of the bottom of the liquid tank (6011) and extends into the liquid spraying chamber (6013); a sealing plate (6024) is fixedly mounted on the top of the slide bar (6023) and is slidably connected to the inner wall of the liquid spraying chamber (6013).

9. A nozzle testing device for locomotive wheel rim lubrication according to claim 8, characterized in that: A pressing plate (6025) is fixedly mounted on the rear side of the movable plate (5012) corresponding to the rear part of the carrier frame (3) via an L-shaped rod. The pressing plate (6025) is located on the top of the reset plate (6022) and is used to press the reset plate (6022) to move the sealing plate (6024) downward, thereby squeezing out the phenolphthalein reagent in the liquid spraying chamber (6013).

10. A nozzle testing device for locomotive wheel rim lubrication according to claim 1, characterized in that: A sealing positioning cone (8) is provided on the top of the machine body (1). During testing, the bottom end of the nozzle (7) is inserted into the sealing positioning cone (8) for sealing positioning.

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