Low-pressure test air inlet control tool structure

Abstract

The utility model relates to a low pressure test air inlet control tooling structure, including: frame, push rod, surge tank, pressure regulating valve, beam tube wheel and pressure gauge, the frame is provided with bumping post and elastic square post respectively, the push rod is connected with the frame front end in rotary connection mode, the front end of the push rod is provided with arc hook, and the front end of the push rod is connected with the elastic square post. A rotary supporting frame is arranged on the outer side of the arc hook, the beam tube wheel is arranged in the frame and rotationally connected with the frame, a buffer tube is evenly wound on the beam tube wheel, and the surge tank is in pipeline connection with the pressure gauge through the pressure regulating valve and the buffer tube. According to the utility model, the pump can be quickly pried through the running fit of the push rod and the frame, and the air inlet of the mechanical seal cavity is completely separated from the ground through the support of the rotating support, so that a tester can quickly connect a test pipeline; gas pumped manually passes through the pressure stabilizing tank, the pressure regulating valve and the buffer pipe and then enters the mechanical seal cavity, the speed is low, the flow speed is stable, the mechanical seal cavity is not prone to being damaged, and manual inflation is facilitated for control and adjustment.

Description

Technical Field

[0001] This utility model belongs to the technical field of pump tools, and specifically relates to a low-pressure test air intake control fixture structure. Background Technology

[0002] The mechanical seal cavity of a pump primarily serves a sealing function, maintaining a certain pressure within it depending on the operating conditions. Typically, the mechanical seal cavity requires a low-pressure test (0.04 MPa) for 10 minutes to verify its seal tightness. This type of pressure test requires relatively low pressure, and traditionally, a small air pump is used for manual air intake. However, due to the small size of the mechanical seal cavity, controlling the intake volume manually is difficult, leading to a sudden pressure spike. This instantaneous pressure exceedance can damage the mechanical seal or reduce its lifespan. For some pumps that are heavy and have the test inlet located at the bottom of the mechanical seal cavity, the tester must manually tilt the pump using a pry bar to facilitate the pressure test.

[0003] When performing air pressure sealing tests on the mechanical seal cavity of pump products using existing manual air pumps, the air pressure and flow rate produced by the manual press structure are extremely unstable. Due to the small size of the mechanical seal cavity, the instantaneous excessive pressure caused by the fluctuating gas flow rate can easily lead to damage to the top of the mechanical seal. Furthermore, the air inlet for some mechanical seal cavity tests is located too low, making it inconvenient to pry the pump up with a crowbar before connecting the air inlet test pipeline. Utility Model Content

[0004] This invention provides a low-pressure test air intake control fixture structure to solve the technical problems mentioned above, such as unstable air intake that easily damages the mechanical seal and inconvenience in connecting test pipelines.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a low-pressure test air intake control fixture structure, characterized in that it includes:

[0006] A frame, on which a stop post is provided, and above the stop post is a spring post, the spring post being slidably connected to the frame;

[0007] A push rod is rotatably connected to the front end of the frame. The front end of the push rod is provided with an arc hook, and the rear end of the push rod is provided with a push handle. A swivel support is provided on the outside of the arc hook, and a brake handle is provided on the push handle.

[0008] A pressure stabilizing tank is placed at the bottom of the vehicle frame. Valves are provided on both sides of the pressure stabilizing tank, and a one-way air valve is provided on one side of the valve.

[0009] The pressure regulating valve is connected to the valve on the other side of the pressure stabilizing tank via a pipeline.

[0010] A bundle tube wheel is placed inside the frame in a rotatable connection. A buffer tube is evenly wound on the bundle tube wheel. One end of the buffer tube is connected to the pressure regulating valve, and a pressure gauge is installed at the other end of the buffer tube.

[0011] Preferably, the push rod is in the shape of a square ring, and the push rod is rotatably connected to the outside of the frame. The push rod and the frame are in clearance fit, and the push rod and the frame are limited by the stop post and the spring post.

[0012] Preferably, the spring-loaded column includes an inclined column, a central rod, a locking platform, a spring, and a pull rope. The inclined column is slidably connected to the frame and is placed inside the frame. The spring is provided at the rear end of the inclined column. The central rod is threadedly connected to the inclined column. The locking platform is provided on the central rod. The pull rope is connected to the central rod.

[0013] Preferably, the inclined column is provided with an inclined surface, and the inclined surface of the inclined column is in a figure-eight shape.

[0014] Preferably, the brake handle is connected to the rotating support frame by a brake cable, the rotating support frame is rotatably connected to the arc hook by a rotating shaft, a brake cable is wound around the outside of the rotating shaft of the rotating support frame, and a tension spring is provided between the rotating support frame and the push rod.

[0015] Preferably, an air cylinder is provided at the rear of the vehicle frame, and one side of the pressure stabilizing tank is connected to the air cylinder via a one-way air valve. A first pressure gauge and a pressure relief valve are sequentially provided on the upper part of the pressure stabilizing tank.

[0016] Preferably, a test valve is provided between the pressure gauge and the buffer tube, and the buffer tube is manually pulled to rotate the bundle tube wheel.

[0017] The beneficial effects of this utility model are as follows: This utility model uses a push rod and a rotating frame to pry up the pump and support it with a swing bracket, completely lifting the air inlet of the mechanical seal cavity off the ground. This facilitates the testing personnel directly connecting the pressure gauge's tubing to the pump's mechanical seal cavity air inlet, making the connection of the mechanical seal cavity's test tubing extremely convenient. The pressure stabilizing tank can pre-fill with manually pumped gas from an air cylinder for pressure stabilization. Then, controlled by a pressure regulating valve and through a long, coiled buffer tube, the gas is slowly delivered into the mechanical seal cavity. The airflow into the mechanical seal cavity is slow and stable, which not only reduces the risk of damage to the mechanical seal cavity but also facilitates manual control and adjustment. This fixture has a simple structure, is easy to use, and offers excellent convenience for batch pressure testing of mechanical seal cavities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0020] Figure 3 This is the utility model Figure 1 A partial structural diagram;

[0021] Figure 4 This is the utility model Figure 3 A schematic diagram of the left-side view structure;

[0022] Figure 5 This is a schematic diagram of the structure of the elastic square column of this utility model;

[0023] Figure 6 This is a schematic diagram of the main structure of an embodiment of this utility model;

[0024] Figure 7 This is the utility model Figure 6 A schematic diagram of the left cross-section of the swivel support frame;

[0025] In the diagram: 1. Frame, 11. Stop post, 12. Spring square post, 121. Inclined post, 1211. Inclined surface, 122. Center rod, 123. Locking platform, 124. Spring, 125. Step pull rope, 2. Push rod, 21. Arc hook, 22. Swivel support frame, 221. Swivel shaft, 222. Tension spring, 23. Push handle, 24. Brake handle, 241. Brake cable, 3. Pressure stabilizing tank, 31. Valve, 32. One-way air valve, 33. Pressure relief valve, 34. First pressure gauge, 4. Pressure regulating valve, 5. Bundle tube wheel, 51. Buffer tube, 6. Pressure gauge, 61. Test valve, 7. Air cylinder. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be understood that the preferred embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. In the embodiments, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to an electrical connection; they can refer to a hydraulic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Reference Figures 1 to 7 As shown, one aspect of this utility model provides a low-pressure test air intake control fixture structure, including: a frame 1, a push rod 2, a pressure stabilizing tank 3, a pressure regulating valve 4, a bundle tube wheel 5, a pressure gauge 6, and an air cylinder 7.

[0030] The following text will describe in detail some of the structure and principles of the components described above according to this tooling.

[0031] As an example, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the frame 1 can be a square frame made of welded square tubes. The lower part of the frame 1 can be equipped with self-locking wheels. The frame 1 can be welded with partitions for storing tools. The upper end of the frame 1 can be a flat platform that can be used as a workbench. The pressure stabilizing tank 3 can be placed at the bottom of the frame 1. The pressure stabilizing tank 3 can be a cylindrical gas tank. Valves 31 are provided on the inlet and outlet of both sides of the pressure stabilizing tank 3. A first pressure gauge 34 and a pressure relief valve 33 are arranged sequentially on the upper part of the pressure stabilizing tank 3. A one-way air valve 32 is provided on one side valve 31 of the pressure stabilizing tank 3. The pressure stabilizing tank 3 is connected to the air outlet pipeline of the air cylinder 7 through the one-way air valve 32. The air cylinder 7 is a manual air pump. The air cylinder 7 can be bolted to the frame 1. The valve 31 on one side of the pressure stabilizing tank 3 is connected to the air cylinder 7 through the one-way air valve 32. The valve 31 on the other side of the pressure stabilizing tank 3 is connected to the buffer tube 51 on the bundle tube wheel 5 through the pressure regulating valve 4. The pressure regulating valve 4 can be an SMC brand AC dual unit (AC2010-02), with a pressure regulating range of 0.01-0.85MPa. The buffer tube 51 can be a corrugated flexible hose with good sealing performance. The bundle tube wheel 5 can be placed inside the frame 1 in a rotatable connection. The buffer tube 51 is evenly wound on the bundle tube wheel 5. One end of the buffer tube 51 is connected to the pressure regulating valve 4, and the other end of the buffer tube 51 is connected to the pressure gauge 6. A test valve 61 can also be set between the pressure gauge 6 and the buffer tube 51. The test valve 61 is the same as the valve 31, which is a regulating valve for opening or closing the air passage. The buffer tube 51 is evenly wound on the bundle tube wheel 5. After the bundle tube wheel 5 is rotated, the buffer tube 51 can be wound up or unwound. Holding the pressure gauge 6 and manually pulling the buffer tube 51, the bundle tube wheel 5 is rotated, moving the pressure gauge 6 to the connection area for detection.

[0032] In a specific embodiment of this utility model, the gas pumped manually into the pressure stabilizing tank 3 through the air cylinder 7 is stabilized. The one-way valve 32 prevents the gas in the pressure stabilizing tank 3 from flowing back into the air cylinder 7. The internal pressure of the pressure stabilizing tank 3 can be viewed through the first pressure gauge 34. The pressure in the pressure stabilizing tank 3 can also be released by manually pulling the pressure relief valve 33. The pressure in the pressure stabilizing tank 3 is usually the test pressure to 0.01 MPa greater than the test pressure. The pressure is then controlled by the pressure regulating valve 4 and slowly and steadily delivered to the mechanical seal cavity of the pump body under test through the long, coiled buffer tube 51. The airflow speed when entering the mechanical seal cavity is slow and the flow rate is stable, which not only makes it less likely to damage the mechanical seal cavity, but also facilitates manual control and adjustment of air replenishment.

[0033] As an example, such as Figure 1 , Figure 2 , Figure 5 As shown, a stop post 11 is provided on the frame 1. The stop post 11 is a circular metal post and is welded to the frame 1. The push rod 2 is rotatably connected to the front end of the frame 1. The rear of the push rod 2 can be limited by the stop post 11. The stop post 11 can be covered with a rubber sleeve to prevent noise when the push rod 2 contacts the stop post 11. The push rod 2 is square-shaped and can be made of welded steel pipe. The axis of the rotatable connection between the push rod 2 and the frame 1 is on the same axis, ensuring smooth rotation of the push rod 2 on the frame 1. The push rod 2 is rotatably connected to the outside of the frame 1. The push rod 2 and the frame 1 are in a clearance fit. The lower end of the push rod 2 on the frame 1 is limited by the stop post 11. A spring-loaded square post 12 is provided above the stop post 11, and the spring-loaded square post 12 can be placed inside the frame 1 for a sliding fit connection. The upper end of the push rod 2 on the frame 1 is limited by the spring-loaded square post 12. In other words, the push rod 2 and the frame 1 can be locked together by the stop post 11 and the spring-loaded square post 12 in a pin-like manner, preventing the push rod 2 from rotating on the frame 1.

[0034] Reference Figure 5 As shown, the spring-loaded column 12 can be an elastic pin. The spring-loaded column 12 may include an inclined column 121, a central rod 122, a locking platform 123, a spring 124, and a pull rope 125. The inclined column 121 is provided with an inclined surface 1211. The inclined column 121 is placed inside the frame 1 and can be slidably connected to the frame 1. The spring 124 is provided at the rear end of the inclined column 121, and the spring 124 pushes the inclined column 121 outward. The central rod 122 is threadedly connected to the inclined column 121, and the locking platform 123 is integrally formed on the central rod 122. 23. The inclined column 121 can be prevented from being completely pushed out or detached from the frame 1 by the spring 124 through the middle rod 122 and the locking platform 123; the middle rod 122 can be connected to the foot pull rope 125. Pulling the foot pull rope 125 can move the middle rod 122 and the inclined column 121 and further compress the spring 124, so that the inclined column 121 can be completely retracted into the frame 1 and will not be exposed, ensuring that the spring column 12 cannot limit the push rod 2, and the push rod 2 can rotate and move upward on the frame 1.

[0035] The spring-loaded columns 12 can be symmetrically distributed in two on the frame 1. The inclined surfaces 1211 of the inclined columns 121 all face outwards, and the inclined surfaces 1211 of the two inclined columns 121 are distributed in a V-shape or a figure-eight shape. When the push rod 2 rotates downwards on the frame 1, the push rod 2 can compress the inclined columns 121 inwards through the transition of the inclined surfaces 1211, causing the push rod 2 to contact the stop post 11. At this time, the push rod 2 disengages from the inclined columns 121, and the spring 124 fully lifts the inclined columns 121 again, locking the push rod 2 between the stop post 11 and the inclined columns 121 of the spring-loaded columns 12. A foot-operated pull rope 125 can be tied between the two spring-loaded columns 12 distributed in a figure-eight shape, allowing the inclined columns 121 to extend or retract when stepped on.

[0036] In the embodiments, reference is made to Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, the front end of the push rod 2 is provided with an arc hook 21, which is welded to the push rod 2. Multiple arc hooks 21 can be distributed in a rake-tooth-like protrusion pattern. The rear end of the push rod 2 is provided with a push handle 23, which allows the arc hook 21 at the front end of the push rod 2 to be used as a lever. When the space between the mechanical seal cavity of the pump product and the air inlet of the pressure gauge 6 is small, the pump body can be pried up using the arc hook 21 to increase the operating space for pipeline connection. Simultaneously, a rotating support frame 22 is provided on the outside of the arc hook 21, which is rotatably connected to the arc hook 21. The rotating shaft 221 of the rotating support frame 22 is rotatably connected to the arc hook 21 using a bearing-type connection. A tension spring 222 is provided between the rotating support frame 22 and the push rod 2, with both ends of the tension spring 222 resting on the push rod 2 and the rotating support frame 22 respectively. The tension spring 222 pulls the rotating support frame 22 closer to the push rod 2. The push rod 2 has a push handle 23 at its rear end, and a brake handle 24 is provided on the push handle 23. The brake handle 24 can be a bicycle brake handle structure. The brake cable 241 of the brake handle 24 can be tightly connected to the rotating shaft 221 of the rotating support frame 22. The brake cable 241 can be wound around the rotating shaft 221. When the brake handle 24 is manually squeezed, the rotating shaft 221 is driven by the brake cable 241 to rotate the rotating support frame 22 synchronously. The tension spring 222 is stretched, so that the rotating support frame 22 is supported directly below the arc hook 21. This ensures that if the pump is pried up too heavily, it will hit the hand or damage the connecting parts, thus providing good safety. This utility model utilizes the rotational cooperation between the push rod 2 and the frame 1 to quickly pry up the pump and support it with the pivot bracket 22, so that the air inlet of the mechanical seal cavity is completely lifted off the ground. This makes it easy for testers to directly connect the pipeline connector of the pressure gauge 6 to the air inlet of the pump's mechanical seal cavity. The process of connecting the test pipeline of the mechanical seal cavity is extremely convenient. The overall structure of this tooling is simple, it is easy to use, and it can improve the testing efficiency when performing batch pressure tests on the mechanical seal cavity.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this invention. Therefore, the protection scope of this utility model should be primarily defined by the scope of the claims.

Claims

1. A low pressure test intake control tooling structure, characterized by, Include: Frame, the frame is provided with a blocking column, the blocking column is provided with a elastic square column above, the elastic square column is connected with the frame in sliding fit; Push rod, the front end of the push rod is connected with the front end of the frame in rotating connection, the front end of the push rod is provided with an arc hook, the rear end of the push rod is provided with a push handle, the outer side of the arc hook is provided with a rotating support frame, the push handle is provided with a brake handle; Stable pressure tank, placed in the bottom of the frame, the stable pressure tank is provided with a valve on both sides, the one-way air valve is arranged on the valve of the stable pressure tank; Pressure regulating valve, pipeline connection with the other side valve of the stable pressure tank; The bundle pipe wheel is placed in the frame in rotating connection, the buffer pipe is uniformly wound on the bundle pipe wheel, one end of the buffer pipe is in pipeline communication with the pressure regulating valve, the other end of the buffer pipe is provided with a pressure gauge.

2. The low pressure test intake control tooling structure of claim 1, wherein: The push rod is in the form of square ring, the push rod is connected with the outer part of the frame in rotating connection, the push rod and the frame are gap fit, the push rod and the frame are limited by the blocking column and the elastic square column.

3. The low pressure test intake control tooling structure of claim 2, wherein: The elastic square column includes an inclined column, a middle rod, a clamping table, a spring and a pull rope, the inclined column is connected with the frame in sliding fit, the inclined column is placed in the frame, the rear end of the inclined column is provided with the spring, the middle rod is connected with the inclined column in screw thread, the middle rod is provided with the clamping table, the pull rope is connected with the middle rod.

4. The low pressure test intake control tooling structure of claim 3, wherein: The inclined surface is arranged on the inclined column, the inclined surface of the inclined column is in the form of eight character inclined.

5. The low pressure test intake control tooling structure of claim 1, wherein: The brake handle is connected with the rotating support frame in the form of brake line, the rotating support frame is connected with the arc hook in the form of rotating shaft, the rotating support frame is wound with brake line outside the rotating shaft, the rotating support frame and the push rod are provided with a tension spring.

6. The low pressure test intake control tooling structure of claim 1, wherein: The rear part of the frame is provided with a gas cylinder, one side of the stable pressure tank is connected with the gas cylinder in pipeline, the upper part of the stable pressure tank is provided with a first pressure gauge and a pressure relief valve in sequence.

7. The low pressure test intake control tooling structure of claim 1, wherein: The test valve is arranged between the pressure gauge and the buffer pipe, the buffer pipe is manually pulled to make the bundle pipe wheel rotate.

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