Sealing test clamp for connecting elbow of pressure oil pump

Abstract

The utility model discloses a sealing test fixture for a connecting elbow of a pressure oil pump, which belongs to the technical field of sealing test and comprises a sealing part I and a sealing part II, the sealing part I comprises a clamping jaw clamped and fixed on the inner surface of the flange end surface of the connecting elbow and a blanking cap arranged in the clamping jaw and used for pressing an orifice at the flange end surface of the connecting elbow; an O-shaped ring I embedded into the plug cover is arranged on the pressing end face of the plug cover, the pressing screw penetrates through a clamping jaw body, a threaded through hole matched with the pressing screw is formed in the clamping jaw body, and the sealing part II comprises a bottom plate and a positioning shaft plug fixed to the bottom plate and used for plugging the end face of the outer circle of the connecting bent pipe. An O-shaped ring II embedded into the positioning shaft plug is arranged on the plugging surface of the positioning shaft plug, a movable pressing plate capable of overturning is hinged to the bottom plate, and an arc-shaped open groove matched with the end face of the outer circle of the connecting bent pipe is formed in the outer end of the movable pressing plate; the sealing device is of a clamping jaw rotating pressing plate type split structure, the overall structure is light, operation of a user is facilitated, the sealing effect is good, and machining is easy.

Description

Technical Field

[0001] This utility model belongs to the field of sealing test technology, specifically relating to a sealing test fixture for connecting bends of oil pumps. Background Technology

[0002] The hydraulic pump connecting elbow is an important component of the hydraulic pump system, used to connect the hydraulic pump to other parts and ensure smooth oil flow. A sealing test must be performed on the hydraulic pump connecting elbow before use. The hydraulic pump connecting elbow has a relatively complex shape with many spatial angles; its structure is as follows... Figure 1 As shown, one end is the flange end face 20 of the connecting bend, and the other end is the outer circle end face 21 of the connecting bend. The orifices that need to be sealed at both ends are located in the X plane and the Y plane respectively, which are not in the same plane, so the requirements for the sealing test fixture are high.

[0003] Existing technology uses conventional sealing test fixtures for sealing tests, such as Figure 2 As shown, the connecting elbow flange end face 20 adopts a frame-type clamping method. The inner surface of the connecting elbow flange end face 20 is tightly fitted with the U-shaped groove, and the outer surface of the connecting elbow flange end face 20 is clamped to the round pressure plate by matching bolts. An O-ring I6 is provided between the outer surface of the flange end face 20 and the round pressure plate. However, since the clamping method uses an integral fixture, the fixture is heavy, which is inconvenient for workers to operate and results in high labor intensity. In addition, the O-ring I6 used for sealing the connecting elbow flange end face 20 needs to be placed between the round pressure plate and the outer surface of the connecting elbow flange end face 20 each time. Since the round pressure plate and the connecting elbow flange end face 20 are in a vertical position, the O-ring I6 can easily slip off between the round pressure plate and the connecting elbow flange end face 20, and the sealing surface cannot be completely sealed, affecting the efficiency of the sealing test.

[0004] like Figure 3 As shown, the outer circular end face 21 of the connecting bend also adopts a frame-type clamping method. One end of the clamp is tightly fitted with the outer surface of the outer circular end face 21 of the connecting bend and an O-ring II 14 is inserted for sealing. The other end is clamped by bolts and a circular pressure plate. Although the clamp is a split type, the weight of the two parts is still relatively large, which is inconvenient for workers to operate and increases labor intensity. In addition, since the part of the oil pump connecting bend clamped by the circular pressure plate in the clamp is an arc surface, it is not on the same axis as the center of the outer circular end face 21 of the connecting bend. It often happens that the outer circular end face 21 of the connecting bend and the clamp plane cannot fit together after clamping, resulting in the sealing surface not being completely sealed, which also affects the sealing test efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing test fixture for connecting bends of oil pumps. It is a split structure with rotating jaws and pressure plates. The overall structure is lightweight, convenient for users to operate, and has good sealing effect and is easy to process.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A sealing test fixture for connecting a hydraulic pump to a bend includes a sealing part I for sealing the flange end face of the connecting bend and a sealing part II for sealing the outer circular end face of the connecting bend. The sealing part I includes a claw whose end is fixed to the inner surface of the flange end face of the connecting bend and a plug disposed inside the claw, which is pressed against the orifice at the flange end face of the connecting bend by rotating a clamping screw. An O-ring I is embedded in the clamping end face of the plug. The clamping screw passes through the body of the claw and has a threaded through hole matching the clamping screw. The sealing part II includes a base plate and a positioning plug fixed on the base plate for sealing the orifice at the outer circular end face of the connecting bend. An O-ring II is embedded in the sealing surface of the positioning plug. A movable pressure plate that can be rotated is also hinged to the base plate, and the outer end of the movable pressure plate has an arc-shaped groove matching the outer circular end face of the connecting bend.

[0008] A further improvement of this utility model is that: a handle passes through the head of the clamping screw, the head of the clamping screw has a through hole that matches the handle, and retaining rings are provided at both ends of the handle to prevent the handle from falling off.

[0009] A further improvement of the present invention is that: a pin II passes through the positioning shaft plug and the base plate at their relative positions; the positioning shaft plug and the base plate are provided with through holes that match the pin II; and the two ends of the pin II are respectively provided with nuts III and V that match them.

[0010] A further improvement of this utility model is that the end of the movable pressure plate is hinged to the base plate by a ball head bolt and a pin I, and the shank of the ball head bolt is also provided with a matching nut II.

[0011] A further improvement of this utility model is that: a screw passes through the middle of the movable pressure plate, the end of the screw extends into the base plate, there is a through hole matching the screw at the relative position of the movable pressure plate and the base plate, and a matching nut I and nut IV are respectively provided at the head and middle part of the screw.

[0012] A further improvement of this utility model is that the claw, the movable pressure plate, and the base plate are all hollow structures.

[0013] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0014] This utility model features a split structure with rotating jaws and a pressure plate. The overall structure is lightweight, easy for users to operate, and easy to manufacture. The vertically placed O-ring I is fixedly embedded in the end face of the plug, preventing slippage when sealing the flange end face of the connecting bend, thus ensuring the normal conduct of the test. When the movable pressure plate is used to seal the outer end face of the connecting bend, the force direction on the outer end face of the connecting bend is on the same axis as its end face center, and the outer end face of the connecting bend is completely fitted with the base plate, resulting in a good sealing effect.

[0015] The present invention has a handle passing through the head of the clamping screw, and the head of the clamping screw has a through hole that matches the handle. Furthermore, retaining rings are provided at both ends of the handle. The handle is designed to make it more convenient for users to operate, and the retaining rings prevent the handle from falling off.

[0016] The claws, movable pressure plate, and base plate of this utility model are all hollow structures, which further reduces its weight and makes it easy to use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the hydraulic pump connection bend structure;

[0018] Figure 2 , Figure 3 This is a schematic diagram of the original sealing test;

[0019] Figure 4 This is a three-dimensional assembly drawing of this utility model;

[0020] Figure 5 This is a three-dimensional assembly exploded view of this utility model;

[0021] The components are as follows: 1. Clamping screw; 2. Retaining ring; 3. Handle; 4. Claw; 5. Plug; 6. O-ring I; 7. Moving pressure plate; 8. Nut I; 9. Screw; 10. Ball head bolt; 11. Nut II; 12. Positioning shaft plug; 13. Base plate; 14. O-ring II; 15. Pin I; 16. Pin II; 17. Nut III; 18. Nut IV; 19. Nut V; 20. Connecting elbow flange end face; 21. Connecting elbow outer diameter end face. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to embodiments:

[0023] like Figure 1 As shown, a sealing test fixture for connecting elbows of a hydraulic pump includes two parts, sealing part I and sealing part II, which are used to seal the flange end face 20 and the outer circular end face 21 of the connecting elbow, respectively.

[0024] The sealing part I includes a claw 4 whose end is fixed to the inner surface of the end face 20 of the connecting elbow flange, and a plug 5 located inside the claw 4. The plug 5 is pressed into the orifice at the end face 20 of the connecting elbow flange by rotating the clamping screw 1. An O-ring I 6 is embedded in the clamping end face of the plug 5. The clamping screw 1 passes through the body of the claw 4, and the body of the claw 4 has a threaded through hole that matches the clamping screw 1. A handle 3 passes through the head of the clamping screw 1, and the head of the clamping screw 1 has a through hole that matches the handle 3. Retaining rings 2 are provided at both ends of the handle 3. The handle 3 is designed to make it easier for the user to operate, and the retaining rings 2 prevent the handle 3 from falling off.

[0025] The sealing part II includes a base plate 13 and a positioning shaft plug 12 fixed on the base plate 13 for sealing the orifice at the outer end face 21 of the connecting bend. A pin II 16 passes through the positioning shaft plug 12 and the base plate 13 at their respective positions. The positioning shaft plug 12 and the base plate 13 are provided with through holes that match the pin II 16. Nuts III 17 and V 19 that match the pin II 16 are provided at both ends. An O-ring II 14 is embedded in the sealing surface of the positioning shaft plug 12. A movable pressure plate that can be rotated is also hinged to the base plate 13. 7. The end of the movable pressure plate 7 is hinged to the base plate 13 by ball head bolt 10 and pin I 15. The ball head bolt 10 is also provided with a matching nut II 11. The outer end of the movable pressure plate 7 is provided with an arc-shaped slot that matches the outer circular end face 21 of the connecting bend. A screw 9 passes through the middle of the movable pressure plate 7. The end of the screw 9 is inserted into the base plate 13. There are through holes matching the screw 9 at the relative positions of the movable pressure plate 7 and the base plate 13. The head and middle part of the screw 9 are respectively provided with matching nuts I 8 and IV 18.

[0026] This utility model features a split structure with rotating jaws and a pressure plate. The overall structure is lightweight, easy for users to operate, and easy to process. The vertically placed O-ring I6 is fixedly embedded in the pressing end face of the plug 5, preventing slippage when sealing the flange end face 20 of the connecting bend, thus ensuring the normal conduct of the test. When the movable pressure plate 7 is used to seal the outer circular end face 21 of the connecting bend, the force direction of the outer circular end face 21 of the connecting bend is on the same axis as its end face center, and the outer circular end face 21 of the connecting bend is completely fitted with the base plate 13, resulting in a good sealing effect.

[0027] In one embodiment of this utility model, the claw 4, the movable pressure plate 7, and the base plate 13 are all hollow structures, which further reduces their weight and makes them easy to use.

[0028] Instructions for use: When using this utility model, first use the sealing part II to seal the outer end face 21 of the connecting bend. Specifically, place the combination of the positioning shaft plug 12 and the O-ring II 14 into the hole of the positioning shaft plug 12 on the base plate 13, and tighten the pin II 16, tighten the nut III 17 and the nut V 19, then rotate the pressure plate 7 around the pin I 15 as the axis to cover the outer end face 21 of the connecting bend, and tighten the nuts I 8, IV 18 and II 11 to ensure that the outer end face 21 of the connecting bend is completely sealed; then use the sealing part I to seal the flange end face 20 of the connecting bend. Specifically, place the flange end face 20 of the connecting bend into the jaw 4, and then rotate the handle 3 to drive the clamping screw 1 to rotate inward until the flange end face 20 of the connecting bend is completely sealed.

[0029] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A sealing test fixture for connecting bends in a hydraulic pump, characterized in that: It includes a sealing part I for sealing the flange end face (20) of the connecting bend and a sealing part II for sealing the outer circular end face (21) of the connecting bend; The sealing part I includes a claw (4) whose end is fixed to the inner surface of the connecting elbow flange end face (20) and a plug (5) located inside the claw (4) to press the orifice at the connecting elbow flange end face (20) by rotating the clamping screw (1). An O-ring I (6) is embedded in the clamping end face of the plug (5). The clamping screw (1) passes through the body of the claw (4) and the body has a threaded through hole matching the clamping screw (1). The sealing part II includes a base plate (13) and a positioning shaft plug (12) fixed on the base plate (13) for sealing the opening at the outer circular end face (21) of the connecting bend. An O-ring II (14) is embedded in the sealing surface of the positioning shaft plug (12). A movable pressure plate (7) that can be rotated is also hinged on the base plate (13). The outer end of the movable pressure plate (7) is provided with an arc-shaped groove that matches the outer circular end face (21) of the connecting bend.

2. The sealing test fixture for connecting bends of a hydraulic pump according to claim 1, characterized in that: The head of the clamping screw (1) has a handle (3) passing through it. The head of the clamping screw (1) has a through hole that matches the handle (3), and the two ends of the handle (3) are provided with retaining rings (2) to prevent the handle (3) from falling off.

3. The sealing test fixture for connecting bends of a hydraulic pump according to claim 1, characterized in that: A pin II (16) passes through the positioning shaft plug (12) and the base plate (13) at their relative positions. The positioning shaft plug (12) and the base plate (13) are provided with through holes that match the pin II (16), and the two ends of the pin II (16) are respectively provided with nuts III (17) and nuts V (19).

4. The sealing test fixture for connecting bends of a hydraulic pump according to claim 1, characterized in that: The end of the movable pressure plate (7) is hinged to the base plate (13) by ball head bolt (10) and pin I (15), and the shank of the ball head bolt (10) is also provided with a matching nut II (11).

5. A sealing test fixture for a hydraulic pump connecting bend according to claim 4, characterized in that: A screw (9) passes through the middle of the movable pressure plate (7), and the end of the screw (9) extends into the bottom plate (13). There are through holes matching the screw (9) at the relative positions of the movable pressure plate (7) and the bottom plate (13), and the head and middle part of the screw (9) are respectively provided with matching nuts I (8) and nut IV (18).

6. A sealing test fixture for a hydraulic pump connecting bend according to claim 1, characterized in that: The claw (4), the movable pressure plate (7), and the base plate (13) are all hollow structures.

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