A vertical assembly device for a cartridge valve and an assembly method thereof

Abstract

This invention discloses a vertical assembly device and method for a plate-type multi-way valve, relating to the field of plate-type multi-way valve assembly. The assembly device includes a sub-assembly table and a final assembly table. The sub-assembly table includes a base and a rotatable and lockable turntable. A pin is formed on the side of the turntable away from the base, used to insert and position the valve plate. The final assembly table includes an assembly plate and a connecting sleeve. A first nut is inserted into the connecting sleeve, and the shape of the inner cavity of the connecting sleeve is adapted to the shape of the first nut. The first nut is threadedly connected to a first screw arranged in a vertical direction, and the first screw abuts against the inner bottom wall of the connecting sleeve at one end. The first screw is used to insert several valve bodies, and a second nut is threadedly connected to the first screw. When the first nut and the second nut abut against the vertically stacked valve bodies, a plate-type multi-way valve is formed. This invention solves the problem of the potential for sealing ring detachment caused by horizontal stacking by changing the stacking direction of the valve bodies from horizontal to vertical in the final assembly process.

Description

Technical Field

[0001] This invention relates to the field of plate multi-way valve assembly, and more particularly to a vertical assembly device and assembly method for plate multi-way valves. Background Technology

[0002] A disc-type multi-way valve is a modular hydraulic control valve composed of multiple independent discs stacked together. Each disc can independently control a hydraulic actuator. They are bolted between the base valve and the tail plate, forming a compact multi-way hydraulic control system. These valves are widely used in construction machinery, hoisting machinery, and agricultural machinery. They support parallel, series, or combined oil circuit connections and feature pressure compensation and load sensing functions, enabling precise control of flow and pressure, improving operational efficiency and stability.

[0003] Currently, the assembly of disc-type multi-way valves is mainly completed using a horizontal workbench combined with simple support fixtures. Specifically, firstly, studs extending horizontally are pre-set. Then, the operator sequentially passes each valve disc through the studs, with the disc surface perpendicular to the horizontal direction. After all the valve discs have passed through the studs, they are stacked horizontally. Next, the operator puts nuts on both ends of the studs and applies force to the nuts at both ends of the studs with a wrench, pressing the nuts onto the outermost valve disc to establish axial preload. However, in actual production, this assembly method has a risk of sealing ring detachment due to the horizontal stacking. Specifically, when the valve discs are horizontally stacked on the studs, the opening direction of the O-ring mounting groove between the reversing couplings (the reversing coupling is the basic working unit in a disc-type multi-way valve that controls the direction of movement of a single actuator, equivalent to an independent reversing valve) is parallel to the direction of gravity. Under the action of gravity, the sealing ring will experience a slight radial downward slippage, easily partially detaching from the groove constraint. When the valve plate is pushed in, the dislodged sealing ring may be sheared or squeezed and deformed, leading to internal leakage of hydraulic oil passages after assembly, which affects the reliability of the whole machine.

[0004] Therefore, a vertical assembly device and assembly method for a plate-type multi-way valve are proposed to solve the problem of potential detachment of the sealing ring caused by horizontal stacking. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical assembly device and assembly method for a plate-type multi-way valve, which solves the problem of potential detachment of the sealing ring caused by horizontal stacking.

[0006] To achieve this objective, the present invention adopts the following technical solution: A vertical assembly device for a plate-type multi-way valve, the assembly device includes a sub-assembly table and a main assembly table, the sub-assembly table includes a base and a rotatable and lockable turntable, a pin is formed on the side of the turntable away from the base, the pin is used to insert and position the valve plate; The assembly platform includes an assembly plate and a connecting sleeve. A first nut is inserted into the connecting sleeve, and the shape of the inner cavity of the connecting sleeve is adapted to the shape of the first nut. The first nut is threadedly connected to a first screw arranged in a vertical direction, and the first screw is located at one end of the connecting sleeve and abuts against the inner bottom wall of the connecting sleeve. The first screw is used to pass through several valve bodies. A second nut is threadedly connected to the first screw. When the first nut and the second nut abut against the vertically stacked valve bodies respectively, a plate-type multi-way valve is formed.

[0007] A rotating shaft is provided at the center of the turntable, and the turntable is connected to the base through the rotating shaft. A boss is formed on the base at the position corresponding to the turntable, and a locking block is provided on the boss to move in the direction of the turntable. When the locking block contacts the turntable, it locks the turntable.

[0008] The turntable has several grooves at equal intervals on its outer side, and the locking block has a protrusion. The width of the locking block is adapted to the width of the inner cavity of the groove. When the locking block moves and contacts the groove, it locks the turntable.

[0009] A cylinder is provided on the base, and the locking block is connected to the output end of the cylinder.

[0010] The assembly plate is provided with a guide rail plate, and a connecting plate is detachably fixed on the assembly plate. A bolt is threadedly connected to the corresponding connecting sleeve on the connecting plate. When the bolt rotates and moves towards the connecting sleeve, the bolt clamps the valve body located between the guide rail plate and the connecting plate.

[0011] The assembly plate is threaded with a second screw, and the second screw is provided with an abutment plate. The connecting plate abuts between the assembly plate and the abutment plate.

[0012] An assembly method for a vertical assembly device for a plate-type multi-way valve, the assembly method being applied to the assembly device described above, the assembly method comprising the following steps: Step S1: Fix the valve plate to be assembled on the sub-assembly table, take the radial side of the valve plate as the first assembly reference, and then rotate the valve plate around the horizontal axis so that different functional modules are installed on different circumferential sides of the valve plate to obtain the valve body. Step S2: After assembling the first screw and the first nut, a positioning component is obtained. Then, the positioning component is installed vertically so that the first nut is embedded in the connecting sleeve on the assembly plate. Step S3: Repeat step S1 to obtain several valve bodies. Then, using the axial end face of the valve body as the second assembly reference, stack the corresponding positioning parts of the valve body from top to bottom. The valve body includes a sealing ring, which is installed on the valve body under the action of gravity. Step S4: After several valve bodies are stacked, install the second nut on the first screw and tighten the second nut to abut against the uppermost valve body to obtain a plate-type multi-way valve.

[0013] Step S1 specifically includes the following steps: Step S11: Align the mounting hole of the valve plate to be assembled with the pin on the turntable, insert the valve plate and place it flat on the surface of the turntable. At this time, the radial side of the valve plate is facing upward, which serves as the first assembly reference surface for the current process. Step S12: Then retract the locking block from the groove around the turntable to release the lock on the turntable. The operator manually rotates the turntable so that the target side of the valve plate to be installed faces upward. When the turntable is rotated to the appropriate angle, the locking block extends and engages with the corresponding groove. By using the matching relationship between the width of the locking block and the width of the groove cavity, the turntable is circumferentially locked. Step S13: On the locked, upward-facing side, use a tool to install the corresponding functional module and tighten it. Step S14: Repeat steps S12 and S13, and rotate the turntable around the axis to rotate each circumferential side of the valve plate to the upward operating position until all sides of the valve plate that require the installation of accessories are assembled; after assembly, remove the assembled valve body from the pin to obtain the valve body.

[0014] Step S2 specifically includes the following steps: Step S21: Screw the first nut into the bottom end of the first screw, and the two are connected by threads to form a positioning component, with the first nut serving as the load-bearing base of the positioning component; Step S22: With one end of the first nut facing down, the assembled positioning component is vertically placed into the connecting sleeve of the assembly table, and the first nut is embedded in the fitting inner cavity of the connecting sleeve.

[0015] Step S3 specifically includes the following steps: Step S31: Use the axial end face of the first valve body as the second assembly reference, align its mounting hole with the first screw on the positioning part, and fit it from top to bottom until the bottom end face of the valve body contacts the upper end face of the connecting sleeve. Step S32: Place a sealing ring in the sealing groove on the upper end face of the placed valve body. The sealing ring sinks to the bottom of the sealing groove under the action of gravity. Then, take off a piece of valve body, align its mounting hole with the first screw, and put it on top of the previous piece of valve body from top to bottom. Step S33: Repeat step S32 until all valve bodies are stacked in the preset order.

[0016] Step S4 specifically includes the following steps: Step S41: After all valve bodies are stacked, screw the second nut into the top of the first screw to connect the second nut to the first screw. Step S42: Use a torque wrench to apply a preset torque to the second nut until the second nut abuts against the uppermost valve body to obtain a plate-type multi-way valve.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a vertical assembly device and method for a multi-way valve. By changing the stacking direction of the valve bodies from horizontal to vertical during the final assembly process, the stacking axis of the valve bodies is parallel to the direction of gravity when inserted along the first screw. Each valve body end face is in a horizontal position, and the opening direction of the sealing ring mounting groove is perpendicular to the direction of gravity. When placed in the groove, the sealing ring sinks vertically to the bottom of the groove under its own weight and adheres to the bottom surface. Before the valve bodies are tightened, there is no tendency for it to come off radially outward, thus eliminating the risk of the sealing ring being sheared or deformed by the subsequently stacked valve bodies, ensuring the sealing reliability of the hydraulic oil passages after assembly. Simultaneously, the inner shape of the connecting sleeve matches the shape of the first nut. After the first nut is embedded in the connecting sleeve, it is circumferentially constrained and cannot rotate. This eliminates the need for additional clamping at the bottom of the first screw during tightening. The operator only needs to apply torque to the second nut at the top of the first screw to establish the axial preload of the entire valve. The tightening operation is simplified from the double-end cooperation in traditional horizontal assembly to single-end force application, reducing operational actions and labor intensity. Furthermore, the turntable in the sub-assembly station can rotate around a horizontal axis and sequentially rotate different circumferential sides of the valve plate to an upward operating position. The operator can complete the installation of each circumferential functional module of the valve plate from a fixed position. After assembly, the valve body can be removed from the pin to obtain a valve body suitable for final assembly, reducing the risk of repeated handling and impact to the workpiece. The sub-assembly station and final assembly station in the device provide corresponding positioning and support for different process requirements of circumferential accessory installation and axial stacking of the entire valve body. The assembly process follows the sequence of sub-assembly followed by final assembly, with clear benchmarks at each stage to ensure assembly consistency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the base and the turntable in this invention; Figure 3 This is a schematic diagram of the right side of the dispensing stage in this invention; Figure 4 This is a schematic diagram of the disassembled structure of the connecting sleeve and the second nut in this invention; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A; Figure 6 This is a top view of the assembly plate in this invention. Figure 7 This is a schematic diagram of another state of the assembly station in this invention. Figure 8 This is a flowchart of the assembly method in this invention.

[0021] Illustration: 1. Sub-assembly platform; 11. Base; 111. Boss; 112. Locking block; 12. Turntable; 121. Pin; 122. Groove; 13. Shaft; 14. Cylinder; 2. Final assembly platform; 21. Assembly plate; 211. Connecting plate; 212. Bolt; 213. Second screw; 214. Abutment plate; 22. Connecting sleeve; 23. First nut; 24. First screw; 25. Second nut; 26. Guide rail plate. Detailed Implementation To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0023] Example 1: Please see Figures 1 to 8 This embodiment provides a vertical assembly device for a plate-type multi-way valve. The assembly device includes a sub-assembly platform 1 and a main assembly platform 2. The sub-assembly platform 1 includes a base 11 and a rotatable and lockable turntable 12. A pin 121 is formed on the side of the turntable 12 away from the base 11. The pin 121 is used to insert and position the valve plate. The assembly platform 2 includes an assembly plate 21 and a connecting sleeve 22. A first nut 23 is inserted into the connecting sleeve 22, and the shape of the inner cavity of the connecting sleeve 22 is adapted to the shape of the first nut 23. The first nut 23 is threadedly connected to a first screw 24 arranged vertically, and one end of the first screw 24 abuts against the inner bottom wall of the connecting sleeve 22. The first screw 24 is used to pass through several valve bodies. A second nut 25 is threadedly connected to the first screw 24. When the first nut 23 and the second nut 25 abut against the vertically stacked valve bodies, a plate-type multi-way valve is formed. Specifically, the inner cavity of the connecting sleeve 22 has a polygonal structure, and the outer periphery of the first nut 23 is set with a corresponding structure that matches the polygonal structure to restrict the circumferential rotation of the first nut 23.

[0024] In the above structure, the connecting sleeve 22 and the first nut 23 form a passive circumferential constraint through the adaptation of their inner cavity shapes. After the first screw 24 is installed vertically, the stacking axis of the valve body is parallel to the direction of gravity. During the stacking process, the sealing ring sinks to the bottom of the groove due to its own weight because the groove opening is perpendicular to the direction of gravity, and does not have a tendency to slip radially, thus avoiding the common problem of sealing ring falling off when stacking horizontally. At the same time, the first nut 23 cannot rotate due to the constraint of the connecting sleeve 22, and the operator only needs to apply force to the second nut 25 on one side at the top to complete the axial tightening, simplifying the traditional double-end operation process.

[0025] The turntable 12 of the disassembly station 1 can rotate around the horizontal axis and be circumferentially locked. After the operator positions the valve plate through the pin 121, rotating the turntable 12 will make the different circumferential sides face upwards in sequence. All accessories are installed in the fixed position to obtain the valve body.

[0026] The assembly using the above-mentioned device ensures reliable positioning of the sealing ring through vertical stacking, reduces operational actions through unilateral fastening, and clarifies the datum for sub-assembly and final assembly, thereby improving assembly consistency and efficiency. The passive constraint structure of the connecting sleeve 22 is simple and reliable, requiring no additional clamping components; the valve body's own weight ensures that the mating surfaces are naturally parallel, reducing the need for correction; and the sealing ring's gravity self-positioning eliminates the need for grease assistance, ensuring the cleanliness of the hydraulic system.

[0027] Example 2: The basic content is the same as in Example 1, except that: Please see Figure 3In this embodiment, a rotating shaft 13 is provided at the center of the turntable 12. The turntable 12 is connected to the base 11 through the rotating shaft 13. A boss 111 is formed on the base 11 at the position corresponding to the turntable 12. A locking block 112 that moves toward the turntable 12 is provided on the boss 111. When the locking block 112 contacts the turntable 12, it locks the turntable 12.

[0028] Furthermore, the turntable 12 has several grooves 122 evenly spaced on its outer side, and the locking block 112 has a protrusion 111 through it. The width of the locking block 112 is adapted to the width of the inner cavity of the groove 122. When the locking block 112 moves and contacts the groove 122, it locks the turntable 12.

[0029] Furthermore, a cylinder 14 is provided on the base 11, and the locking block 112 is connected to the output end of the cylinder 14.

[0030] In embodiment 2, a rotating shaft 13 is provided at the center of the turntable 12, and the turntable 12 is connected to the base 11 through the rotating shaft 13, thereby realizing rotation around the horizontal axis. A boss 111 is formed on the base 11 at the position corresponding to the turntable 12. A locking block 112 that can move towards the turntable 12 is provided on the boss 111. After the locking block 112 contacts the turntable 12, it applies circumferential constraint to the turntable 12 to lock the turntable 12. Several grooves 122 are evenly spaced on the outer side of the turntable 12. The locking block 112 passes through the boss 111, and the width of the locking block 112 is adapted to the width of the inner cavity of the groove 122. When the locking block 112 enters the groove 122 during movement, the cooperation between the locking block 112 and the groove 122 can restrict the circumferential rotation of the turntable 12. A cylinder 14 is also provided on the base 11. A locking block 112 is connected to the output end of the cylinder 14. The cylinder 14's extension and retraction movement drives the locking block 112 to move forward and backward relative to the groove 122. When installing the circumferential accessories of the valve plate, the operator first fixes the valve plate to the pin 121 through the mounting hole, with the radial side of the valve plate facing upward as the assembly reference. When it is necessary to change the mounting surface, the cylinder 14 drives the locking block 112 to retract from the groove 122 to release the lock on the turntable 12. The operator can then manually rotate the turntable 12 to rotate the target side of the valve plate to be installed to the upward position. After rotation, the cylinder 14 drives the locking block 112 to extend and engage in the corresponding groove 122, using the fit between the width of the locking block 112 and the inner width of the groove 122 to relock the turntable 12. By repeating the above unlocking, rotating, and locking operations, each circumferential side of the valve plate can face upward in sequence, allowing the operator to complete the installation of all functional modules on all sides from a fixed position. This structure makes it easier to switch the posture during the valve plate assembly process. The positioning method of the locking block 112 and the groove 122 ensures the consistency of the angle after each rotation. The cylinder 14 drives the locking block 112 to move forward and backward, which reduces the operational intensity of unlocking and locking actions.

[0031] In the above structure, the turntable 12 is connected to the base 11 via a rotating shaft 13. The rotational motion revolves around the fixed axis of the rotating shaft 13, which provides stable rotational support for the turntable 12, ensuring smooth rotation and consistent axial position. A boss 111 is positioned on the base 11 corresponding to the turntable 12. A locking block 112 passes through the boss 111, providing a mounting base and a guide channel for the locking block 112. This ensures that the movement direction of the locking block 112 is consistent with the radial direction of the turntable 12, facilitating accurate alignment between the locking block 112 and the groove 122. The equally spaced grooves 122 on the outer side of the turntable 12 mate with the locking block 112. The equal spacing of the grooves 122 ensures that the angular interval is the same each time the turntable 12 rotates to the position of an adjacent groove 122, allowing the operator to perform indexing rotation in fixed angular increments, meeting the angular positioning requirements when the valve plate is installed on multiple sides. The width of the locking block 112 is adapted to the width of the inner cavity of the groove 122. When the locking block 112 enters the groove 122, the gap between the side of the locking block 112 and the side wall of the groove 122 is small, which can effectively limit the circumferential shaking of the turntable 12 and improve the stability of the valve plate in the locked state. The output end of the cylinder 14 is directly connected to the locking block 112. The reciprocating linear motion of the cylinder 14 realizes the forward and backward movement of the locking block 112. The operator only needs to control the reversing of the cylinder 14 to complete the unlocking and locking actions, without having to manually move the locking block 112 or tighten the locking handle, reducing the operation steps and physical exertion.

[0032] Furthermore, the engagement between the locking block 112 and the groove 122 is a rigid mechanical limit. In the locked state, the turntable 12 will not experience angular displacement due to vibration or slight external force, which helps ensure the stability of the valve plate's posture during accessory installation and avoids installation errors or collisions caused by accidental rotation of the turntable 12. The evenly spaced grooves 122 give the turntable 12 a defined circumferential indexing position. During repeated rotation, the operator does not need to additionally measure or observe the angle scale; simply aligning the locking block 112 with the next groove 122 completes the positioning, improving the efficiency and consistency of repetitive operations. The cylinder 14, as the driving element for the locking block 112, has a fast response speed and a fixed stroke, allowing for quick switching between unlocked and locked states, thus shortening the auxiliary time for each posture switch. The cylinder 14 bears the operating force for rotating and locking the turntable 12. The operator only needs to apply the force to rotate the turntable 12 without simultaneously overcoming the frictional resistance of the locking mechanism, reducing the operator's hand labor intensity, making it particularly suitable for mass assembly operations.

[0033] Example 3: The basic content is the same as in Example 1, except that: Please see Figures 4 to 6In this embodiment, the assembly plate 21 is provided with a guide rail plate 26, and a connecting plate 211 is detachably fixed on the assembly plate 21. A bolt 212 is threadedly connected to the connecting sleeve 22 on the connecting plate 211. When the bolt 212 rotates and moves toward the connecting sleeve 22, the bolt 212 clamps the valve body located between the guide rail plate 26 and the connecting plate 211.

[0034] Furthermore, a second screw 213 is threadedly connected to the assembly plate 21, and an abutment plate 214 is provided on the second screw 213. The connecting plate 211 abuts between the assembly plate 21 and the abutment plate 214.

[0035] In embodiment 3, when bolt 212 rotates, its end can move towards connecting sleeve 22. During the overall valve assembly, after the valve bodies are stacked sequentially from top to bottom along the first screw 24, the operator can rotate bolt 212 to push the end of bolt 212 towards the side of the valve body until the end of bolt 212 abuts against the side of the stacked valve bodies, thereby applying a lateral clamping force to the valve body stack. This clamping force, in conjunction with guide plate 26, can temporarily fix the valve body stack before tightening the second nut 25, to prevent the valve bodies from being stacked too high, causing the center of gravity to shift upward and resulting in tipping. At the same time, by rotating the nut on the second screw 213, the abutment plate 214 can be moved towards the assembly plate 21, thereby pressing and fixing the connecting plate 211 onto the assembly plate 21. When it is necessary to adjust the position of the connecting plate 211 to accommodate valve bodies of different specifications, the abutment plate 214 can be loosened, the connecting plate 211 can be moved to the appropriate position and then tightened, so as to realize the detachable fixing and position adjustment of the connecting plate 211 on the assembly plate 21.

[0036] In the above structure, bolt 212, in conjunction with guide plate 26, applies a lateral clamping force to the stacked valve body layers. This clamping force is independent of the axial tightening force of the first screw 24 and the second nut 25, stabilizing the posture of the valve body stack before the axial preload is established, reducing the risk of tipping due to valve body rotation or shaking during tightening. Bolt 212 and connecting plate 211 are connected by threads. The forward and backward stroke of bolt 212 can be controlled by the number of rotations. The operator can flexibly adjust the clamping degree according to the actual thickness of the valve body stack, avoiding excessive clamping force causing damage to the valve body surface or insufficient clamping force leading to fixation failure.

[0037] In a specific embodiment, such as Figure 7As shown, the guide rail plate 26 is rotatably mounted on the assembly plate 21, and the guide rail plate 26 is equipped with grippers. During the assembly of the multi-way valve, the grippers can hold the multi-way valve in assembly to prevent it from tipping over when stacked. In addition, after the multi-way valve is assembled, the rotatable guide rail plate 26 is used to dock with the test platform, and the multi-way valve located on the assembly plate 21 can slide on the guide rail plate 26 to facilitate the vertical movement of the multi-way valve to the test platform.

[0038] This invention also provides a vertical assembly device for a plate-type multi-way valve, which is applied to the above-described assembly method. Please refer to [link / reference]. Figure 8 This embodiment describes an assembly method for a vertical assembly device for a plate-type multi-way valve, the assembly method comprising the following steps: Step S1: Fix the valve plate to be assembled on the sub-assembly table 1, take the radial side of the valve plate as the first assembly reference, and then rotate the valve plate around the horizontal axis so that different functional modules are installed on different circumferential sides of the valve plate to obtain the valve body. Step S2: After assembling the first screw 24 and the first nut 23, a positioning component is obtained. Then, the positioning component is installed vertically so that the first nut 23 is embedded in the connecting sleeve 22 on the assembly plate 21. Step S3: Repeat step S1 to obtain several valve bodies. Then, using the axial end face of the valve body as the second assembly reference, stack the corresponding positioning parts of the valve body from top to bottom. The valve body includes a sealing ring, which is installed on the valve body under the action of gravity. Step S4: After several valve bodies are stacked, install the second nut 25 on the first screw 24 and tighten the second nut 25 to abut against the uppermost valve body to obtain a plate-type multi-way valve.

[0039] Step S1: Fix the valve plate to be assembled on the sub-assembly table 1, take the radial side of the valve plate as the first assembly reference, and then rotate the valve plate around the horizontal axis so that different functional modules are installed on different circumferential sides of the valve plate to obtain the valve body. Step S1 specifically includes the following steps: Step S11: Align the mounting hole of the valve plate to be assembled with the pin 121 on the turntable 12, insert the valve plate and flatten it on the surface of the turntable 12. At this time, the radial side of the valve plate faces upward, serving as the first assembly reference surface for the current process. It should be noted that the first assembly reference is used in the sub-assembly stage, with the radial side as a reference for installing functional modules.

[0040] Step S12: Then, retract the locking block 112 from the groove 122 around the turntable 12 to release the lock on the turntable 12. The operator manually rotates the turntable 12 so that the target side of the valve plate to be installed faces upward. When the turntable 12 is rotated to a suitable angle, the locking block 112 extends out and engages with the corresponding groove 122. By utilizing the matching relationship between the width of the locking block 112 and the inner cavity width of the groove 122, the turntable 12 is circumferentially locked. Step S13: On the locked, upward-facing side, use a tool to install the corresponding functional module and tighten it. Step S14: Repeat steps S12 and S13, and rotate the turntable 12 around the rotating shaft 13 to rotate each circumferential side of the valve plate to the upward operating position in sequence until all sides of the valve plate that need to be equipped with accessories are assembled; after assembly, remove the assembled valve body from the pin 121 to obtain the valve body.

[0041] In step S1, through repeated rotation and locking, the different circumferential sides of the valve disc are sequentially positioned facing upwards, allowing the operator to install and secure each functional module from a fixed standpoint, ultimately resulting in a fully assembled valve body. It should be noted that in the assembly process of a multi-way valve disc, different functional modules, such as manual reversing modules, electrical control modules, or hydraulic control modules, need to be installed on the upper surface and left and right sides of each individual valve disc. If a traditional manual method is used, the operator must walk around the workbench or repeatedly move and flip the valve body to position the installation surface in an easily accessible orientation. This process not only increases physical exertion and time but also poses a risk of impact damage due to frequent contact between the valve body and the tooling or workbench, especially for machined sealing surfaces or precision-fitted parts.

[0042] To address the inconvenience and susceptibility to impacts associated with traditional assembly methods, step S1 utilizes the rotation of the turntable 12 and the locking mechanism of the groove 122 and locking block 112 to unify the multi-sided installation of the valve plate into an upward-facing operation. After being positioned by the pin 121, the valve plate rotates with the turntable 12 around a horizontal axis, allowing the operator to ensure the target side faces them without moving, thus avoiding the risk of impacts caused by manual handling and flipping. The cooperation between the locking block 112 and the groove 122 provides reliable circumferential locking after each rotation, ensuring that the valve plate does not rotate accidentally when tightening the screws, guaranteeing installation accuracy and operational safety. This method consolidates the dispersed, circular operation into a repetitive action at a fixed station, eliminating quality risks caused by passive adjustment of the valve plate's posture from a process design perspective.

[0043] The implementation of step S1 significantly simplifies the installation process of the circumferential accessories of the single-piece valve body. The operator only needs to rotate and lock the turntable 12 in front of the assembly table 1 to process each side of the valve piece sequentially, reducing both labor intensity and working time. Since the valve piece is always positioned by the pin 121 and supported by the turntable 12 during rotation, its relative movement with the tooling is controlled, effectively reducing surface scratches or edge bumps caused by free handling. Furthermore, using the radial side as a unified first assembly datum ensures the consistency of the installation positions of each functional module, providing dimensionally and positionally accurate individual components for the subsequent vertical stacking of the entire valve, indirectly guaranteeing the sealing reliability and assembly pass rate during the final assembly stage.

[0044] Step S2: After assembling the first screw 24 and the first nut 23, a positioning component is obtained. Then, the positioning component is installed vertically so that the first nut 23 is embedded in the connecting sleeve 22 on the assembly plate 21. Step S2 specifically includes the following steps: Step S21: Screw the first nut 23 into the bottom end of the first screw 24. The two are connected by threads to form a positioning component, and the first nut 23 serves as the load-bearing base of the positioning component. Step S22: With one end of the first nut 23 facing down, the assembled positioning component is vertically placed into the connecting sleeve 22 of the assembly platform 2, and the first nut 23 is embedded in the matching inner cavity of the connecting sleeve 22.

[0045] In step S2, after the first nut 23 sinks into the connecting sleeve 22, its circumferential rotation is constrained by the inner cavity wall, and it limits the first screw 24, keeping the first screw 24 in a vertically upward state, providing axial guidance for the subsequent insertion and stacking of valve bodies. It should be noted that in the overall assembly stage of the multi-way valve, several valve bodies need to be sequentially inserted and stacked along the first screw 24, and finally axial preload is established by tightening the top second nut 25. However, in the traditional horizontal assembly method, the bottom first nut 23 is in a free state. When the operator applies torque at the top, the first screw 24 will drive the bottom first nut 23 to rotate synchronously, resulting in the inability to effectively establish axial tension. Therefore, it is usually necessary for two people to cooperate or for the operator to hold a wrench in each hand and apply force to both ends of the screw, fixing one end and applying force to the other end. The operation process is cumbersome and it is difficult to ensure torque consistency.

[0046] To address the cumbersome issue of traditional long bolt tightening requiring operation from both ends, step S2 establishes a passive circumferential constraint at the bottom end by pre-screwing the first nut 23 into the first screw 24 and embedding it entirely into the adaptable inner cavity of the connecting sleeve 22. In subsequent steps, when the operator tightens the second nut 25 only at the top of the first screw 24, the following torque on the first screw 24 is transmitted to the first nut 23 at the bottom. The first nut 23, constrained by the shape of the inner cavity of the connecting sleeve 22, cannot rotate, thus converting the torque into axial tension on the first screw 24. This eliminates the need for additional clamping or tools at the bottom end; tightening can be achieved solely through force applied from the top. Step S2 replaces manual assistance with structural fit, eliminating the burden of double-end operation from the very beginning of the assembly process.

[0047] Step S2 simplifies the tightening process in the overall valve assembly from a two-end operation to a single-end operation. The operator only needs to tighten the second nut 25 at the top of the stacked valve bodies, without needing to consider the state of the first nut 23 at the bottom, reducing the number of operators and steps, and improving assembly efficiency. Simultaneously, the reliable constraint of the connecting sleeve 22 on the first nut 23 ensures the stability of the reaction force support during each tightening, contributing to the accurate transmission of tightening torque and thus improving the consistency of the axial preload of the multi-piece valve bodies. Furthermore, the vertical installation of the positioning component provides a vertical guide reference for the subsequent top-to-bottom insertion of the valve bodies into the stack, allowing the valve bodies to fall smoothly into place along the first screw 24, creating the preconditions for gravity-assisted stacking to prevent detachment.

[0048] Step S3: Repeat step S1 to obtain several valve bodies. Then, using the axial end face of the valve body as the second assembly reference, stack the corresponding positioning parts of the valve body from top to bottom. The valve body includes a sealing ring, which is installed on the valve body under the action of gravity. Step S3 specifically includes the following steps: Step S31: Take the axial end face of the first valve body as the second assembly reference, align its mounting hole with the first screw 24 on the positioning part, and fit it from top to bottom until the bottom end face of the valve body contacts the upper end face of the connecting sleeve 22. Step S32: Place a sealing ring in the sealing groove on the upper end face of the placed valve body. The sealing ring sinks to the bottom of the sealing groove under gravity. Then, remove a valve body piece, align its mounting hole with the first screw 24, and slide it onto the previous valve body piece from top to bottom, stacking it on top of the previous valve body piece. It should be noted that the sealing groove refers to the annular groove opened on the end face of the valve body for installing the O-ring seal. When the two valve bodies are stacked and pressed together, the sealing ring is compressed between the groove and the end face of the adjacent valve body, forming a seal. The second assembly datum is used in the final assembly stage, using the axial end face as a reference for stacking and alignment. Step S33: Repeat step S32 until all valve bodies are stacked in the preset order.

[0049] In step S3, the entire stacking process is axially guided by the first screw 24, and each valve body is positioned vertically in sequence by its own weight. It should be noted that in the assembly of a multi-way valve, the inlet body, several reversing couplings, and the tail plate are stacked sequentially along the connecting screw, and sealing rings are installed on the sealing surfaces between each valve body to prevent hydraulic oil leakage. However, in the traditional horizontal stacking method, the opening direction of the sealing ring mounting groove is parallel to the direction of gravity. Under its own weight, the sealing ring is prone to radial slippage, partially disengaging from the groove constraint. When subsequent valve plates are pushed in, the disengaged sealing ring may be sheared or deformed, leading to internal leakage in the hydraulic oil passages after assembly. Therefore, it is necessary to change the valve body posture during the stacking process to eliminate the adverse effects of gravity on the sealing ring and ensure that the sealing ring remains stably within the groove before the valve bodies are stacked.

[0050] To address the issue of sealing rings easily detaching due to traditional horizontal stacking, step S3 changes the stacking direction from horizontal to vertical. In the vertical position, the opening direction of the sealing ring mounting groove is perpendicular to the direction of gravity. When the sealing ring is placed in the upper end groove, gravity causes it to sink evenly to the bottom of the groove and adhere to the bottom surface, preventing radial slippage. When the operator sequentially inserts subsequent valve bodies, the sealing ring remains in the predetermined position under the constraint of gravity, avoiding shear or compression damage caused by the pushing action of the valve body. This method does not rely on additional auxiliary materials or temporary fixing structures; it fundamentally eliminates the mechanical conditions for sealing ring detachment simply by changing the relative direction of the valve body and the gravitational field during the stacking process.

[0051] The implementation of step S3 significantly improves the positioning reliability of the sealing ring during the valve stacking process. Under gravity, the sealing ring automatically sinks to the bottom of the groove and remains stable, eliminating the need for repeated checks or adjustments by the operator, thus reducing auxiliary actions and potential quality issues during assembly. The vertical stacking method avoids the risk of the sealing ring being sheared or squeezed, reducing the hydraulic oil passage leakage failure rate caused by seal failure from the process source. Furthermore, the valve bodies are sequentially inserted from top to bottom along the first screw 24, with the relative positions between each valve body axially guided by the first screw 24, ensuring stacking accuracy and providing a good assembly foundation for subsequent unilateral tightening and uniform establishment of the overall valve axial preload.

[0052] Step S4: After several valve bodies are stacked, install the second nut 25 on the first screw 24 and tighten the second nut 25 to abut against the uppermost valve body to obtain a plate-type multi-way valve.

[0053] Step S4 specifically includes the following steps: Step S41: After all valve bodies are stacked, screw the second nut 25 into the top of the first screw 24 to connect the second nut 25 to the first screw 24. Step S42: Apply a preset torque to the second nut 25 using a torque wrench until the second nut 25 abuts against the uppermost valve body to obtain a plate-type multi-way valve.

[0054] In step S4, the first nut 23 at the bottom of the first screw 24 is circumferentially constrained and cannot rotate because it is embedded in the fitting inner cavity of the connecting sleeve 22. The torque applied at the top is fully converted into the axial tension of the first screw 24, thereby pressing the stacked valve bodies axially. It should be noted that after the valve bodies are stacked, the valve bodies are only positioned by the first screw 24, and a reliable axial clamping force has not yet been formed. The sealing ring at the sealing surface is not sufficiently compressed and deformed, and the sealing performance of the hydraulic oil passage cannot be guaranteed. In the traditional fastening method, wrenches need to be operated at both ends of the screw, with one end fixed and the other end applied force. The operation process is cumbersome and requires two people to cooperate or the operator to work with both hands alternately.

[0055] To address the issues of cumbersome traditional double-end tightening operations and poor torque consistency, step S4 utilizes the passive circumferential constraint established in step S2, applying force only on one side of the top of the first screw 24 to complete the overall valve tightening. When the operator applies torque to the second nut 25, the rotational tendency of the first screw 24 is transmitted to the bottom first nut 23. The first nut 23, constrained by the inner cavity of the connecting sleeve 22, cannot rotate with the screw, thus creating a reaction force support. The operator does not need to clamp or use tools at the bottom; the second nut 25 can be tightened to the specified torque using only the top torque wrench, establishing the axial preload. This method simplifies the tightening process and reduces manual intervention.

[0056] With the implementation of step S4, the axial tightening process of the entire valve is simplified from a two-end operation to a single-end operation. The operator only needs to tighten the second nut 25 at the top of the stacked valve bodies, reducing the number of operators and the number of steps, and improving the overall assembly efficiency. Utilizing the reliable circumferential constraint of the connecting sleeve 22 on the first nut 23, the reaction force support is stable during tightening, and the preset torque applied by the torque wrench can be accurately transmitted to the screw, ensuring uniform axial clamping force between the valve bodies and guaranteeing the uniformity of the sealing ring compression. The resulting multi-way valve with tightly joined valve plates and a reliable seal at the sealing surface provides a qualified assembly foundation for subsequent hydraulic testing and overall machine assembly.

[0057] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vertical assembly device for a plate-type multi-way valve, characterized in that, The assembly device includes a sub-assembly table (1) and a main assembly table (2). The sub-assembly table (1) includes a base (11) and a rotatable and lockable turntable (12). A pin (121) is formed on the side of the turntable (12) away from the base (11). The pin (121) is used to insert and position the valve plate. The assembly platform (2) includes an assembly plate (21) and a connecting sleeve (22). A first nut (23) is inserted into the connecting sleeve (22), and the shape of the inner cavity of the connecting sleeve (22) is adapted to the shape of the first nut (23). The first nut (23) is threadedly connected to a first screw (24) arranged in the vertical direction, and the first screw (24) is located at one end of the connecting sleeve (22) and abuts against the inner bottom wall of the connecting sleeve (22). The first screw (24) is used to pass through several valve bodies. A second nut (25) is threadedly connected to the first screw (24). When the first nut (23) and the second nut (25) abut against the vertically stacked valve bodies respectively, a plate-type multi-way valve is formed.

2. The vertical assembly device for a plate-type multi-way valve according to claim 1, characterized in that, A rotating shaft (13) is provided at the center of the turntable (12). The turntable (12) is connected to the base (11) through the rotating shaft (13). A boss (111) is formed on the base (11) at the position corresponding to the turntable (12). A locking block (112) that moves toward the turntable (12) is provided on the boss (111). When the locking block (112) contacts the turntable (12), it locks the turntable (12).

3. The vertical assembly device for a plate-type multi-way valve according to claim 2, characterized in that, The turntable (12) has several grooves (122) evenly spaced on the outer side. The locking block (112) has a protrusion (111) through it. The width of the locking block (112) is adapted to the width of the inner cavity of the groove (122). When the locking block (112) moves and contacts the groove (122), it locks the turntable (12).

4. The vertical assembly device for a plate-type multi-way valve according to claim 3, characterized in that, A cylinder (14) is provided on the base (11), and the locking block (112) is connected to the output end of the cylinder (14).

5. The vertical assembly device for a plate-type multi-way valve according to claim 1, characterized in that, The assembly plate (21) is provided with a guide rail plate (26), and a connecting plate (211) is detachably fixed on the assembly plate (21). A bolt (212) is threadedly connected to the connecting sleeve (22) on the connecting plate (211). When the bolt (212) rotates and moves towards the connecting sleeve (22), the bolt (212) clamps the valve body located between the guide rail plate (26) and the connecting plate (211).

6. The vertical assembly device for a plate-type multi-way valve according to claim 5, characterized in that, The assembly plate (21) is threaded with a second screw (213), and the second screw (213) is provided with an abutment plate (214). The connecting plate (211) abuts between the assembly plate (21) and the abutment plate (214).

7. An assembly method for a vertical assembly device for a plate-type multi-way valve, characterized in that, The assembly method is applied to the assembly apparatus according to any one of claims 1-6, and the assembly method includes the following steps: Step S1: Fix the valve plate to be assembled on the sub-assembly table, take the radial side of the valve plate as the first assembly reference, and then rotate the valve plate around the horizontal axis so that different functional modules are installed on different circumferential sides of the valve plate to obtain the valve body. Step S2: After assembling the first screw and the first nut, a positioning component is obtained. Then, the positioning component is installed vertically so that the first nut is embedded in the connecting sleeve on the assembly plate. Step S3: Repeat step S1 to obtain several valve bodies. Then, using the axial end face of the valve body as the second assembly reference, stack the corresponding positioning parts of the valve body from top to bottom. The valve body includes a sealing ring, which is installed on the valve body under the action of gravity. Step S4: After several valve bodies are stacked, install the second nut on the first screw and tighten the second nut to abut against the uppermost valve body to obtain a plate-type multi-way valve.

8. The assembly method of the vertical assembly device for the plate-type multi-way valve according to claim 7, characterized in that, Step S1 specifically includes the following steps: Step S11: Align the mounting hole of the valve plate to be assembled with the pin on the turntable, insert the valve plate and place it flat on the surface of the turntable. At this time, the radial side of the valve plate is facing upward, which serves as the first assembly reference surface for the current process. Step S12: Then retract the locking block from the groove around the turntable to release the lock on the turntable. The operator manually rotates the turntable so that the target side of the valve plate to be installed faces upward. When the turntable is rotated to the appropriate angle, the locking block extends and engages with the corresponding groove. By using the matching relationship between the width of the locking block and the width of the groove cavity, the turntable is circumferentially locked. Step S13: On the locked, upward-facing side, use a tool to install the corresponding functional module and tighten it. Step S14: Repeat steps S12 and S13, and rotate the turntable around the axis to rotate each circumferential side of the valve plate to the upward operating position until all sides of the valve plate that require the installation of accessories are assembled; after assembly, remove the assembled valve body from the pin to obtain the valve body.

9. The assembly method of the vertical assembly device for the plate-type multi-way valve according to claim 7, characterized in that, Step S2 specifically includes the following steps: Step S21: Screw the first nut into the bottom end of the first screw, and the two are connected by threads to form a positioning component, with the first nut serving as the load-bearing base of the positioning component; Step S22: With one end of the first nut facing down, the assembled positioning component is vertically placed into the connecting sleeve of the assembly table, and the first nut is embedded in the fitting inner cavity of the connecting sleeve.

10. The assembly method of the vertical assembly device for the plate-type multi-way valve according to claim 7, characterized in that, Step S3 specifically includes the following steps: Step S31: Use the axial end face of the first valve body as the second assembly reference, align its mounting hole with the first screw on the positioning part, and fit it from top to bottom until the bottom end face of the valve body contacts the upper end face of the connecting sleeve. Step S32: Place a sealing ring in the sealing groove on the upper end face of the placed valve body. The sealing ring sinks to the bottom of the sealing groove under the action of gravity. Then, take off a piece of valve body, align its mounting hole with the first screw, and put it on top of the previous piece of valve body from top to bottom. Step S33: Repeat step S32 until all valve bodies are stacked in the preset order.

11. The assembly method of the vertical assembly device for the plate-type multi-way valve according to claim 7, characterized in that, Step S4 specifically includes the following steps: Step S41: After all valve bodies are stacked, screw the second nut into the top of the first screw to connect the second nut to the first screw. Step S42: Use a torque wrench to apply a preset torque to the second nut until the second nut abuts against the uppermost valve body to obtain a plate-type multi-way valve.

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