Pressure mounting clamp for assembling long slide valve

Abstract

The utility model discloses a pressure mounting clamp for assembling a long slide valve, which is used for pressing a valve sleeve into a shell and comprises a support frame, a pressing part and a pressing rod, the press-fitting part comprises a pressing plate, a spiral guide rail, a transmission piece and a hand wheel. The pressing plate is slidably connected to the supporting frame. The lower end of the spiral guide rail penetrates through the upper end of the supporting frame and is detachably connected to the top face of the pressing plate. The transmission part is fixed at the upper end of the support frame and in transmission connection with the spiral guide rail; the hand wheel is in transmission connection with the transmission part to drive the spiral guide rail to drive the pressing plate to vertically slide. The shell is arranged at the lower end of the supporting frame. The lower end of the valve sleeve corresponds to a shell pressing-in opening. The upper end of the pressing rod abuts against the bottom face of the pressing plate, and the lower end of the pressing rod abuts against the upper end of the valve sleeve to press the valve sleeve into the shell. According to the utility model, the vertical press-in of the valve sleeve is realized through the vertical movement of the pressing plate, and compared with other schemes such as horizontal loading, the vertical press-in can reduce the influence of the shape and position change caused by the size and gravity of the long slide valve in the process of loading the long slide valve into the shell on the assembly of the sealing ring to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the field of aviation repair technology, and more specifically to a pressure mounting fixture for assembling long slide valves. Background Technology

[0002] In the aviation repair field, some hydraulic products have long internal spool valves. The valve sleeve surface has multiple sealing ring grooves, each containing a sealing ring to meet the sealing requirements after the valve sleeve is fitted into the hydraulic product housing. After the sealing rings are installed in the valve sleeve grooves, they protrude from the valve sleeve surface. When fitting the valve sleeve with the sealing rings into the product housing, precise control of the installation process is required to avoid damage to the sealing rings. Typically, due to the installation of multiple sealing rings, there is a certain resistance during the installation process. This resistance is related to the number and size of the sealing rings, as well as the fit clearance between the valve sleeve and the housing. This resistance is usually difficult to overcome manually and requires specialized equipment or fixtures for press-fitting. Furthermore, it is necessary to be able to observe or sense for any abnormalities during the press-fitting process.

[0003] Existing common manual pressing equipment or fixtures, due to their standardized design, cannot meet the assembly requirements of long slide valves in terms of pressing methods or working strokes. While some electric equipment or fixtures use sensors to detect resistance during the pressing process, the resistance varies constantly as the valve sleeve enters the housing during pressing. Furthermore, manufacturing deviations in components such as the valve sleeve, housing, and sealing rings make it difficult to predict data fluctuations for different products. Therefore, relying on sensors to monitor resistance data during assembly to determine whether the sealing ring has been damaged is not very reliable. Moreover, such equipment is typically expensive to manufacture, while products in the aviation repair field are usually produced in small quantities, lacking economies of scale, resulting in very limited overall benefits. Therefore, this type of slide valve is still usually assembled manually, relying on human experience combined with the smoothness of force and movement during assembly to determine if the assembly process is successful.

[0004] Therefore, designing a low-cost, simple, and easy-to-maintain manual pressure installation fixture for the reliable assembly of long slide valves is of great significance for the aviation repair operation process. Utility Model Content

[0005] In view of this, the present invention provides a pressure installation fixture for assembling long slide valves, which solves the problem of needing to accurately control the installation process and avoid damage to the sealing ring when assembling long slide valves in hydraulic products in the aviation repair field. It is easy to operate and can be completed by a single person. At the same time, the fixture has a simple structure, low manufacturing cost, and is easy to use and maintain.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pressure mounting fixture for assembling a long slide valve, used to press the valve sleeve into the housing, includes a support frame, a pressing part and a pressure bar;

[0008] The pressing part includes a pressure plate, a spiral guide rail, a transmission component, and a handwheel; the pressure plate is slidably connected to the support frame; the lower end of the spiral guide rail vertically passes through the upper end of the support frame and is detachably connected to the top surface of the pressure plate; the transmission component is fixed to the upper end of the support frame and is drively connected to the spiral guide rail; the handwheel is drively connected to the transmission component to drive the spiral guide rail to move the pressure plate up and down;

[0009] The housing is located at the lower end of the support frame; the lower end of the valve sleeve corresponds to the pressure inlet of the housing; the upper end of the pressure rod abuts against the bottom surface of the pressure plate, and the lower end abuts against the upper end of the valve sleeve to press the valve sleeve into the housing.

[0010] The beneficial effects of this utility model are as follows: Before pressing, multiple sealing rings are fitted onto the outer wall of the valve sleeve, and the lower end of the valve sleeve is pre-inserted into the housing. The insertion length of the valve sleeve is based on the contact between the lowermost sealing ring and the upper end face of the housing. The valve sleeve is positioned by anchoring the lower end of the valve sleeve to the housing. The position of the pressure plate is adjusted by rotating the handwheel to drive the spiral guide rail, moving the pressure plate to the top. At the same time, the assembled valve sleeve and housing are placed on the base. The operator holds the pressure bar and rotates the handwheel to drive the pressure plate down until it abuts against the upper end of the pressure bar. The handwheel is continued to be rotated to drive the pressure plate to provide pressure to the pressure bar. The pressure bar is used to press the valve sleeve into the housing to complete the assembly of the long slide valve. During the continuous assembly process, the operator can hold the pressure bar or the valve sleeve to ensure the vertical pressing of the valve sleeve. This fixture installs the valve sleeve by vertical pressing, which can minimize the impact of the valve sleeve's shape and position changes caused by its own size and gravity on the assembly of the sealing rings compared to other methods such as horizontal installation.

[0011] Preferably, the support frame includes two guide columns and a fixing plate and a base respectively fixed to the upper and lower ends of the two guide columns; the pressure plate is slidably connected to the two guide columns; the transmission component is fixed to the top surface of the fixing plate; the housing is disposed on the top surface of the base; the lower end of the spiral guide rail passes through the fixing plate and is connected to the pressure plate. Utilizing two parallel guide columns as slide rails for the pressure plate, and connecting the two guide columns through the fixing plate and base, the structure is simple and the manufacturing cost is low.

[0012] Preferably, a lower support is bolted to the top surface of the base, and the lower end of the guide post is embedded in the lower support and screwed to the base. The lower end of the guide post is supported by the lower support, ensuring the stability of the guide post. At the same time, the screwed connection between the lower end of the guide post and the base ensures stable support of the guide post during the movement of the pressure plate and facilitates disassembly and assembly.

[0013] Preferably, an upper support is bolted to the bottom surface of the fixing plate, and the upper end of the guide column is embedded in the upper support. By using the upper support to support the upper end of the guide column, combined with the lower support, the parallelism of the axes between the two guide columns can be ensured, thus ensuring the stable operation of the clamp.

[0014] Preferably, the pressing part further includes two linear bearings, each slidably connected to one of the two guide pillars, with its upper end face fixed to the bottom surface of the pressing plate. The balls within the linear bearings can roll along the outer wall of the guide pillars, reducing frictional resistance through point contact and ensuring smooth sliding of the pressing plate along the guide pillars.

[0015] Preferably, a protective sleeve is fitted over the outer wall of the spiral guide rail relative to the upper part of the support frame. During long-term use, the protective sleeve prevents damage and dirt buildup on the upper part of the spiral guide rail; maintenance is only required periodically by applying grease to the portion of the spiral guide rail between the pressure plate and the fixing plate.

[0016] Preferably, the lower end of the spiral guide rail is bolted to the center of the top surface of the pressure plate via a flange. The spiral guide rail is connected to the pressure plate via the flange, making installation and removal convenient and quick.

[0017] Preferably, the axis of the pressure bar is arranged to coincide with the axes of the valve sleeve and the spiral guide rail. The alignment of the pressure plate with the spiral guide rail's axis facilitates the application of force, allowing a single person to complete the valve body installation by turning the handwheel.

[0018] Preferably, the lower end of the spiral guide rail is screwed to the top surface of the pressure plate via a connecting flange.

[0019] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a pressure mounting clamp for assembling long slide valves, which has the following beneficial effects:

[0020] 1. The valve sleeve is vertically pressed in by the up and down movement of the pressure plate. Vertical pressing in has obvious advantages over other methods such as horizontal installation. It can minimize the impact of the shape and position changes of the long slide valve caused by its own size and gravity on the assembly of the sealing ring during the installation of the housing.

[0021] 2. The lateral design of the handwheel ensures that a single person can operate the valve sleeve and observe its movement in real time without the need for assistance from others.

[0022] 3. The spiral guide rail is designed with a protective sleeve, which avoids damage and dirt on the upper part of the guide rail during long-term use of the fixture. The maintenance of the fixture can be achieved by simply applying grease to the part of the spiral guide rail between the pressure plate and the fixed plate periodically.

[0023] 4. The structure is simple and the operation is easy. One person can complete the assembly of long slide valves. The overall reliability of the fixture is high, and it is convenient to use and maintain with low manufacturing cost. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 A schematic diagram of the clamp structure provided by this utility model;

[0026] Figure 2 A front view of the fixture provided by this utility model;

[0027] Figure 3 This is a schematic diagram of the initial state of valve sleeve press-fitting provided by this utility model;

[0028] Figure 4 This is a schematic diagram showing the valve sleeve press-fitted state after the present invention.

[0029] in,

[0030] 1-Support frame; 11-Base; 12-Guide column; 13-Fixing plate; 14-Lower support; 15-Upper support; 16-Fastening bolt; 17-Fastening screw;

[0031] 2-Pressure fitting section; 21-Pressure plate; 22-Spiral guide rail; 23-Handwheel; 24-Transmission component; 25-Linear bearing; 26-Protective sleeve; 27-Flange; 28-Connecting bolt; 29-Lock nut;

[0032] 3-Pressure bar;

[0033] 4-Valve sleeve;

[0034] 5-Sealing ring;

[0035] 6-Shell. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Participate in the attached Figures 1-2 This utility model embodiment discloses a pressure mounting fixture for assembling a long slide valve, used to press the valve sleeve 4 into the housing 6, including a support frame 1, a pressing part 2 and a pressure bar 3;

[0038] The pressing part 2 includes a pressure plate 21, a spiral guide rail 22, a transmission component 24, and a handwheel 23; the pressure plate 21 is slidably connected to the support frame 1; the lower end of the spiral guide rail 22 vertically passes through the upper end of the support frame 1 and is detachably connected to the top surface of the pressure plate 21; the transmission component 24 is fixed to the upper end of the support frame 1 and is connected to the spiral guide rail 22; the handwheel 23 is connected to the transmission component 24 to drive the spiral guide rail 22 to move the pressure plate 21 up and down.

[0039] The housing 6 is located at the lower end of the support frame 1; the lower end of the valve sleeve 4 corresponds to the pressure inlet of the housing 6; the upper end of the pressure rod 3 abuts against the bottom surface of the pressure plate 21, and the lower end abuts against the upper end of the valve sleeve 4 to press the valve sleeve 4 into the housing 6.

[0040] like Figure 1 As shown, a mounting hole is provided in the middle of the fixed plate, and the lower end of the spiral guide rail passes through the mounting hole and is fixed in the middle of the pressure plate; the handwheel drives the spiral guide rail to rotate through the transmission component, and the spiral guide rail can drive the pressure plate to slide up and down along the guide column during the rotation, thereby realizing the pressing of the valve sleeve.

[0041] In some other specific embodiments, the transmission component adopts a gear set, which drives the rotation of the spiral guide rail through the meshing of the gears. The rotational motion of the spiral guide rail can be converted into the linear motion of the pressure plate, realizing the up and down movement of the pressure plate. The handwheel is located on the side of the transmission component corresponding to the long axis of the fixed plate. When the handwheel is turned, the pressing status of the valve sleeve can be observed at any time.

[0042] In some other specific embodiments, the helical guide rail can be replaced by a screw.

[0043] In this embodiment, the support frame 1 includes two guide columns 12 and a fixing plate 13 and a base 11 respectively fixed to the upper and lower ends of the two guide columns 12; the pressure plate 21 is slidably connected to the two guide columns 12; the transmission component 24 is fixed to the top surface of the fixing plate 13; the housing 6 is provided on the top surface of the base 11; the lower end of the spiral guide rail 22 passes through the fixing plate 13 and is connected to the pressure plate 21.

[0044] like Figure 1 and 2 As shown, the support frame uses two guide columns as slide rails for the pressure plate. The two guide columns are connected by a fixed plate and a base, resulting in a simple structure and low manufacturing cost. The spiral guide rail passes through the fixed plate and is connected to the pressure plate. The rotation of the spiral guide rail can be converted into the up and down movement of the pressure plate. The position of the pressure plate relative to the guide columns can be adjusted by driving the rotation of the spiral guide rail with a handwheel, which facilitates the assembly of the housing, valve sleeve and pressure bar.

[0045] To further optimize the above technical solution and ensure smooth up-and-down movement of the pressure plate, the pressing part 2 also includes two linear bearings 25. The two linear bearings 25 are slidably connected to the two guide columns 12 respectively, and their upper end faces are fixed to the bottom surface of the pressure plate 21.

[0046] A linear bearing is fitted onto the outer wall of the guide column. The balls inside the linear bearing roll along the outer wall of the guide column. The upper end of the linear bearing is fastened to the pressure plate through a connecting flange. Through holes are opened at both ends of the pressure plate. The diameter of the through holes is larger than the outer diameter of the guide column. The linear bearing ensures that the pressure plate slides smoothly along the guide column.

[0047] To further optimize the above technical solution and facilitate the maintenance of the fixture, a protective sleeve 26 is provided on the outer wall of the spiral guide rail 22 above the support frame 1.

[0048] The outer wall of the spiral guide rail above the fixed plate is fitted with a protective sleeve to prevent wear and dirt contamination of the spiral guide rail section above the fixed plate. When maintaining the fixture, it is only necessary to lubricate the section of spiral guide rail between the fixed plate and the pressure plate.

[0049] To further optimize the above technical solution, the lower end of the spiral guide rail 22 is bolted to the middle of the top surface of the pressure plate 21 via the flange 27.

[0050] like Figure 2 As shown, the outer wall of the spiral guide rail 22 passes through the mounting hole on the fixing plate 21. The flange 27 is fixed to the middle of the top surface of the pressure plate 21 by connecting bolts 28. The lower end of the spiral guide rail 22 is inserted into the flange 27 and tightened by locking nut 29. By tightening the locking nut 29, the spiral guide rail 22 and the flange 27 can be fastened together, thus realizing the installation of the spiral guide rail 22.

[0051] To further optimize the above technical solution, a lower support 14 is bolted to the top surface of the base 11, and the lower end of the guide post 12 is embedded in the lower support 14 and screwed to the base 11. An upper support 15 is bolted to the bottom surface of the fixing plate 13, and the upper end of the guide post 12 is embedded in the upper support 15.

[0052] like Figure 2 As shown, threaded holes are provided at both ends of the base 11, and the guide post 12 corresponds to the threaded holes. The fastening screw 17 is screwed into the threaded hole from bottom to top and fastened to the lower end of the guide post 12, thereby connecting the guide post 12 and the base 11. At the same time, in order to ensure the overall verticality of the guide post 12, the lower support 14 is sleeved on the lower end of the guide post 12 and located on the top surface of the base 11. In order to ensure the parallelism of the axes between the two guide posts 12, the upper support 15 is sleeved on the upper end of the guide post 12 and located on the bottom surface of the fixing plate 13. The upper support 14 is fastened to the base 11, and the lower support 15 is fastened to the fixing plate 13 by fastening bolts 16.

[0053] To further optimize the above technical solution and ensure convenient force application, the axis of the pressure bar 3 is arranged to coincide with the axis of the spiral guide rail 22.

[0054] The fixture provided in this embodiment, in specific use, such as Figure 3 and 4 As shown, the sealing ring 5 is installed on the valve sleeve 4 beforehand, and the valve sleeve 4 with the sealing ring 5 is placed on the housing 6 for preliminary assembly. During the installation of the valve sleeve 4, the lower end of the valve sleeve 4 can be inserted into the upper inner cavity of the housing 6 for a certain distance. The insertion depth is based on the contact between the lowermost sealing ring and the upper end of the housing. The valve sleeve is positioned during the press-fitting process by anchoring the valve sleeve to the housing for a certain length.

[0055] Prepare a soft metal pressure bar 3, turn the handwheel 23 to raise the pressure plate 21 to the top, place the pre-assembled housing 6 and valve sleeve 4 assembly directly below the pressure plate 21, place the pressure bar 3 on top, and turn the handwheel 23 in the opposite direction to lower the pressure plate 21 until it contacts the upper end of the pressure bar 3; during this process, you need to hold the pressure bar to ensure that the axis of the pressure bar coincides with that of the valve sleeve and the spiral guide rail.

[0056] Continue to slowly rotate handwheel 23, allowing pressure plate 21 to move slowly downwards, driving pressure rod 3 and valve sleeve 4 to slowly press into housing 6. Observe and feel the changes in movement resistance and the smoothness of valve sleeve movement (movement resistance is perceived by the force applied by the operator when rotating handwheel). When valve sleeve 4 is about halfway into housing 6, pause briefly and visually check for any fragments or residues of sealing ring 5 at the joint between valve sleeve 4 and housing 6. If there are no abnormalities, continue to slowly rotate handwheel 23 until valve sleeve 4 is installed in the designated position inside housing 6. During this process, continuously feel the changes in resistance and the smoothness of valve sleeve movement.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure mounting fixture for assembling a long slide valve, used to press a valve sleeve (4) into a housing (6), characterized in that, It includes a support frame (1), a pressing part (2), and a pressing bar (3); The pressing part (2) includes a pressure plate (21), a spiral guide rail (22), a transmission component (24), and a handwheel (23); the pressure plate (21) is slidably connected to the support frame (1); the lower end of the spiral guide rail (22) vertically penetrates the upper end of the support frame (1) and is detachably connected to the top surface of the pressure plate (21); the transmission component (24) is fixed to the upper end of the support frame (1) and is drively connected to the spiral guide rail (22); the handwheel (23) is drively connected to the transmission component (24) to drive the spiral guide rail (22) to drive the pressure plate (21) to slide up and down; The housing (6) is located at the lower end of the support frame (1); the lower end of the valve sleeve (4) corresponds to the pressure inlet of the housing (6); the upper end of the pressure rod (3) abuts against the bottom surface of the pressure plate (21), and the lower end abuts against the upper end of the valve sleeve (4) to press the valve sleeve (4) into the housing (6).

2. The pressure mounting fixture for assembling a long slide valve according to claim 1, characterized in that, The support frame (1) includes two guide columns (12) and a fixing plate (13) and a base (11) respectively fixed to the upper and lower ends of the two guide columns (12); the pressure plate (21) is slidably connected to the two guide columns (12); the transmission component (24) is fixed to the top surface of the fixing plate (13); the housing (6) is provided on the top surface of the base (11); the lower end of the spiral guide rail (22) passes through the fixing plate (13) and is connected to the pressure plate (21).

3. A pressure mounting fixture for assembling long slide valves according to claim 2, characterized in that, The top surface of the base (11) is bolted with a lower support (14), and the lower end of the guide post (12) is embedded in the lower support (14) and screwed to the base (11).

4. A pressure mounting fixture for assembling long slide valves according to claim 3, characterized in that, The bottom surface of the fixing plate (13) is bolted with an upper support (15), and the upper end of the guide column (12) is embedded in the upper support (15).

5. A pressure mounting fixture for assembling long slide valves according to claim 2, characterized in that, The pressing part (2) also includes two linear bearings (25). The two linear bearings (25) are slidably connected to the two guide columns (12) respectively, and their upper end faces are fixed to the bottom surface of the pressure plate (21).

6. A pressure mounting fixture for assembling long slide valves according to claim 1, characterized in that, The spiral guide rail (22) is fitted with a protective sleeve (26) on the outer wall above the support frame (1).

7. A pressure mounting fixture for assembling long slide valves according to claim 1, characterized in that, The lower end of the spiral guide rail (22) is bolted to the middle of the top surface of the pressure plate (21) via a flange (27).

8. A pressure mounting fixture for assembling a long slide valve according to any one of claims 1 to 7, characterized in that, The axis of the pressure bar (3) is arranged to coincide with the axis of the valve sleeve (4) and the spiral guide rail (22).

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