Waterproof experimental needle capable of preventing clogging of water outlet needle hole

Abstract

The utility model belongs to waterproof experiment needle technical field, concretely relates to a waterproof experiment needle capable of preventing the water outlet needle hole from being blocked, including needle cylinder, the tail end of needle cylinder is connected with fixed part, the head is connected with water outlet needle hole, the inside upper portion of needle cylinder is provided with water inlet cavity, the movable screw rod is set up in water inlet cavity, one end of movable screw rod is connected with fixed part, the other end is connected with sealing element, the inside lower portion of needle cylinder is provided with spring inner tube, its inside is provided with spring, and the diameter of spring inner tube is same with the diameter of water inlet cavity, the space of needle cylinder inside lower portion outside spring inner tube outer wall constitutes the water outlet channel of ring shape, the water outlet channel is communicated with the water outlet needle hole of needle cylinder end portion, the water outlet opening is set up between spring inner tube and water inlet cavity bottom, along with the water pressure change in water inlet cavity, sealing element drives movable screw rod to move downward, compresses spring, and the water outlet channel is communicated with water inlet cavity, or spring resets, and the water outlet channel is isolated with water inlet cavity. Prevent the water outlet needle hole from being blocked.

Description

Technical Field

[0001] This utility model belongs to the technical field of waterproof test needles, specifically relating to a waterproof test needle that can prevent clogging of the water outlet needle hole. Background Technology

[0002] In existing waterproofing tests, test needles are often used to simulate water jets and other similar scenarios to test the waterproofing performance of the object being tested. However, traditional test needles have some significant problems.

[0003] On the one hand, during use, ordinary test needles use a circular water outlet cavity. Water enters the test needle directly through the testing equipment. Due to differences in water quality, the test needle is easily affected by particulate matter. Impurities and large solid particles in the water can pass through the water outlet cavity. During the test, under the action of water pressure, these particles are easily stuck inside the water outlet needle hole, making them difficult to remove and causing blockage. Once the water outlet needle hole is blocked, it will affect the normal spraying of water, making the experimental results inaccurate and unable to truly reflect the waterproof performance of the tested object.

[0004] On the other hand, the water outlet chamber of a regular experimental needle is open, and it is easily affected by the water environment, such as water sedimentation, even when not in operation. It requires manual cleaning, which not only increases the difficulty and workload of the experiment, but may also damage the experimental needle due to improper cleaning, affecting its service life. Utility Model Content

[0005] The problem to be solved by this invention is: to design a waterproof experimental needle that can prevent clogging of the water outlet needle hole.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A waterproof experimental needle that can prevent clogging of the water outlet needle hole includes a syringe, a fixing member connected to the tail end of the syringe, a water outlet needle hole connected to the head end of the syringe, a water inlet cavity provided in the upper center of the syringe, a movable screw provided inside the water inlet cavity, one end of the movable screw being connected to the fixing member, and the other end being connected to the sealing member. The lower part of the syringe is equipped with a spring inner cylinder, which contains a spring, and the diameter of the spring inner cylinder is the same as the diameter of the water inlet cavity. The lower part of the syringe interior, outside the outer wall of the spring inner cylinder, forms a circular water outlet channel, which communicates with the water outlet needle hole at the end of the syringe; a water outlet opening is provided between the bottom of the spring inner cylinder and the water inlet cavity. As the water pressure inside the inlet chamber changes, the sealing element drives the movable screw to move downward, compressing the spring and connecting the outlet channel with the inlet chamber; or the spring resets, isolating the outlet channel from the inlet chamber.

[0007] Furthermore, the seal is disc-shaped.

[0008] Furthermore, the diameter of the seal is the same as the diameter of the inlet cavity.

[0009] Furthermore, the bottom of the water inlet chamber is connected to the inner wall of the syringe via an annular partition.

[0010] Furthermore, the top of the spring inner cylinder is lower than the position of the annular partition, and the top of the spring inner cylinder and the bottom of the annular partition form an annular water outlet opening, through which water enters the water outlet channel from the water inlet cavity.

[0011] Furthermore, the height of the water outlet opening is less than the width of the entire water outlet channel.

[0012] Furthermore, the fixing component has an annular water passage hole inside, and the bottom of the water passage hole communicates with the top of the water inlet cavity.

[0013] Furthermore, as the seal moves downward and its top height gradually decreases below that of the annular partition, the water outlet gradually increases, allowing the water inlet cavity and the water outlet channel to connect through the water outlet; and the seal enters the inner cylinder of the spring, compressing the spring.

[0014] Furthermore, when the spring returns to its original position, the seal is forced to move upward, and the seal closes the inlet chamber again, isolating the inlet chamber from the outlet channel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the waterproof test needle of this invention is not in operation, the water outlet channel is closed and will not be affected by the internal environment of the waterproof test needle. When in operation, the water outlet channel is a circular cavity, not the circle of a normal waterproof test needle. Only small solid particles can pass through, and the small solid particles will not block the entire water outlet channel. They can be easily discharged through the water outlet needle hole, thus preventing blockage of the water outlet needle hole.

[0016] If the front end of the water inlet chamber is blocked, the water outlet needle hole can be removed to easily remove the blockage. Attached Figure Description

[0017] Figure 1 This is a half-sectional view of the waterproof test needle of this utility model in its non-working state; Figure 2 This is a half-sectional view of the waterproof test needle of this utility model in its working state.

[0018] Figure label: 1 is a fixing component; 2 is a water passage hole; 3 is a movable screw; 4 is a water inlet cavity; 5 is a sealing component; 6 is a water outlet channel; 61 is a water outlet opening; 7 is a spring; 8 is a water outlet needle hole; 9 is a partition plate; 10 is a spring inner cylinder; 11 is a syringe. Detailed Implementation

[0019] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1 , Figure 2 As shown, this utility model provides a waterproof experimental needle that can prevent clogging of the water outlet needle hole, including a syringe 11, a fixing member 1, a sealing member 5, a spring 7, a water inlet cavity 4, and a water outlet channel 6.

[0022] The syringe 11 has a fixing part 1 connected to the tail end and a water outlet needle hole 8 connected to the head of the syringe 11.

[0023] The fastener 1 uses a connector with external threads to securely install the waterproof test needle onto the test equipment.

[0024] The upper center of the syringe 11 has a cylindrical water inlet cavity 4. Inside the water inlet cavity 4 is a movable screw 3. One end of the movable screw 3 is connected to the fixing part 1, and the other end is connected to the sealing part 5.

[0025] The seal 5 is disc-shaped, and its diameter is the same as that of the inlet chamber 4. The seal 5 is a piston.

[0026] When water enters the water inlet chamber 4, the sealing element 5 is subjected to the water pressure of the water inlet chamber 4, which can drive the movable screw 3 to move up and down, so that the bottom of the water inlet chamber 4 is in a closed or open state.

[0027] The fixing component 1 has an annular water passage hole 2 inside. The top of the water passage hole 2 is connected to the water outlet of the test equipment, and the bottom of the water passage hole 2 is connected to the top of the water inlet chamber 4, so that the water of the test equipment can enter the water inlet chamber 4.

[0028] The bottom of the water inlet chamber 4 is connected to the inner wall of the syringe 11 via an annular partition 9.

[0029] A spring inner cylinder 10 is located in the lower part of the syringe 11, and a spring 7 is installed inside the spring inner cylinder 10. The diameter of the spring inner cylinder 10 is the same as the diameter of the water inlet cavity 4. The lower part of the syringe 11, outside the outer wall of the spring inner cylinder 10, forms an annular water outlet channel 6. When the seal 5 is subjected to water pressure, it gradually enters the spring inner cylinder 10, causing the water outlet channel 6 to gradually open from closed.

[0030] The water outlet channel 6 is connected to the water outlet needle hole 8 at the end of the syringe 11. After the water flows through the water outlet channel 6, it flows out from the water outlet needle hole 8 and enters the test area.

[0031] A water outlet hole 61 is provided between the bottom of the spring inner cylinder 10 and the water inlet cavity 4. The top of the spring inner cylinder 10 is lower than the position of the annular partition 9. The top of the spring inner cylinder 10 and the bottom of the annular partition 9 form an annular water outlet hole 61. Water enters the water outlet channel 6 from the water inlet cavity 4 through the water outlet hole 61.

[0032] The height of the water outlet opening 61 is smaller than the width of the entire water outlet channel 6. Larger particles cannot enter the water outlet channel 6 through the water outlet opening 61. Particles that can pass through the water outlet opening 61 can also pass through the entire water outlet channel 6 due to their size, reducing the risk of particle blockage.

[0033] When the seal 5 moves downward and its top height gradually falls below the annular partition 9, the water outlet opening 61 gradually increases, so that the water inlet cavity 4 and the water outlet channel 6 are connected through the water outlet opening 61; and the seal 5 enters the spring inner cylinder 10 and compresses the spring 7.

[0034] When the spring 7 returns to its original position, the seal 5 moves upward under force, and the seal 5 closes the water inlet chamber 4 again, isolating the water inlet chamber 4 from the water outlet channel 6.

[0035] Working principle: 1. Securely install the waterproof test needle onto the testing equipment using fastener 1; 2. When the testing equipment is turned on, the water inlet chamber 4 is subjected to pressure, and the sealing element 5 moves downward after bearing the water pressure; 3. The water inlet chamber 4 moves downward. When the sealing element 5 reaches a certain stroke, the water outlet opening 61 is connected to the water inlet chamber 4, and the water outlet channel 6 enters the water state, so the waterproof test can be carried out. 4. After the waterproofing test is completed, the pressure in the inlet chamber 4 decreases, the seal 5 is driven upward by the force of the spring 7 to reset, and the outlet channel 6 enters the closed state again.

[0036] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0037] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A waterproof experimental needle that prevents clogging of the water outlet needle hole, comprising a syringe, a fixing member connected to the tail end of the syringe, and a water outlet needle hole connected to the head of the syringe, characterized in that, The upper center of the syringe has a water inlet cavity, and a movable screw is installed inside the water inlet cavity. One end of the movable screw is connected to the fixed part, and the other end is connected to the sealing part. The lower part of the syringe is equipped with a spring inner cylinder, which contains a spring, and the diameter of the spring inner cylinder is the same as the diameter of the water inlet cavity. The lower part of the syringe interior, outside the outer wall of the spring inner cylinder, forms a circular water outlet channel, which communicates with the water outlet needle hole at the end of the syringe; a water outlet opening is provided between the bottom of the spring inner cylinder and the water inlet cavity. As the water pressure inside the inlet chamber changes, the sealing element drives the movable screw to move downward, compressing the spring and connecting the outlet channel with the inlet chamber; or the spring resets, isolating the outlet channel from the inlet chamber.

2. The waterproof experimental needle according to claim 1, which can prevent clogging of the water outlet needle hole, is characterized in that, The seal is disc-shaped.

3. A waterproof experimental needle according to claim 2 that prevents clogging of the water outlet needle hole, characterized in that, The diameter of the seal is the same as the diameter of the inlet chamber.

4. A waterproof experimental needle according to claim 3 that prevents clogging of the water outlet needle hole, characterized in that, The bottom of the water inlet chamber is connected to the inner wall of the syringe via an annular partition.

5. A waterproof experimental needle according to claim 4 that prevents clogging of the water outlet needle hole, characterized in that, The top of the spring inner cylinder is lower than the position of the annular partition. The top of the spring inner cylinder and the bottom of the annular partition form an annular water outlet opening. Water enters the water outlet channel from the water inlet cavity through the water outlet opening.

6. A waterproof experimental needle according to claim 5 that prevents clogging of the water outlet needle hole, characterized in that, The height of the water outlet opening is less than the width of the entire water outlet channel.

7. A waterproof experimental needle according to any one of claims 1-6, characterized in that, The fixing component has an annular water passage hole inside, and the bottom of the water passage hole is connected to the top of the water inlet cavity.

8. A waterproof experimental needle according to claim 7 that prevents clogging of the water outlet needle hole, characterized in that, As the seal moves downwards and its top height gradually decreases below the annular partition, the water outlet gradually enlarges, allowing the water inlet cavity and the water outlet channel to connect through the water outlet; and the seal enters the inner cylinder of the spring, compressing the spring.

9. A waterproof experimental needle according to claim 8 that prevents clogging of the water outlet needle hole, characterized in that, When the spring returns to its original position, the seal is forced to move upward, and the seal closes the inlet chamber again, isolating the inlet chamber from the outlet channel.

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