An adjustable displacement anti-reseal water hammer intake and exhaust valve structure

Abstract

This utility model relates to an adjustable airflow capacity anti-jamming water hammer inlet and outlet valve structure, belonging to the technical field of composite inlet and outlet valves. It includes a valve body, a cylinder, and a throttling slide. The valve body has an inlet and outlet port at its top. The cylinder is vertically positioned at the top of the valve body, and a through hole is formed at the end of the cylinder away from the valve body, communicating with the inlet and outlet port. The throttling slide slides vertically within the cylinder and has a vent hole with a diameter smaller than that of the through hole. This adjustable airflow capacity anti-jamming water hammer inlet and outlet valve structure, through the sliding throttling slide, changes the outflow area of ​​air inside the water pipeline, reducing sudden pressure changes within the pipeline and thus reducing the occurrence of water hammer.

Description

Technical Field

[0001] This utility model relates to the field of composite intake and exhaust valve technology, and in particular to an anti-sealing water hammer intake and exhaust valve structure with adjustable exhaust volume. Background Technology

[0002] The composite air intake and exhaust valve is used to discharge air during main pipeline flushing and operation, and to quickly replenish air when the main pipeline experiences pressure loss. The float inside the valve body uses buoyancy to control the opening and closing of the main valve port; that is, when the pipeline is filled with water, the float rises to close the exhaust port, and when the pipeline is emptied or under negative pressure, the float descends to open the air intake port.

[0003] Chinese utility model patent CN202323206851.5 discloses an improved composite air intake and exhaust valve. This patent uses a spring inside the valve body to support a float and a sleeve assembly to guide the float, allowing the float to rise and fall normally. However, the technical solution in this patent cannot control the exhaust volume of the composite air intake and exhaust valve, thus increasing the risk of water hammer.

[0004] Water hammer is a special type of water hammer phenomenon in pipeline systems caused by fluid dynamic instability. When the local pressure in a pipeline drops suddenly due to factors such as rapid valve closure, pump shutdown, or sudden flow changes, the fluid may vaporize to form vapor cavities, i.e., bubbles. When the water flow refills the cavities, the cavities collapse, causing the fluid to violently impact the pipe walls, thereby generating extremely high transient pressure waves. This pressure shock can cause structural damage to equipment such as pipelines, valves, and pumps (such as cracks and pipe bursts), and can also cause system vibration and noise.

[0005] In response to the above phenomena, the inventors have developed an air intake and exhaust valve structure to prevent water hammer. Utility Model Content

[0006] The purpose of this utility model is to provide an adjustable air release capacity anti-clogging water hammer inlet and outlet valve structure, which aims to solve the problem of clogging water hammer in water conveying equipment.

[0007] This utility model provides an adjustable exhaust volume anti-clogging water hammer inlet and outlet valve structure, which adopts the following technical solution: An adjustable exhaust volume anti-jamming water hammer inlet and outlet valve structure, comprising, The valve body has an inlet and outlet port at its top. A cylindrical body is vertically installed at the top of the valve body. A through hole is opened at the end of the cylindrical body away from the valve body, and the through hole is in communication with the inlet and outlet holes. A throttling slide plate slides vertically within the cylinder. The throttling slide plate has a vent hole, the diameter of which is smaller than the diameter of the through hole.

[0008] Preferably, the valve body has a threaded groove at its top end, and multiple sets of the threaded groove are arranged in a ring around the inlet and outlet holes. The cylinder has a positioning hole corresponding to the threaded groove. The cylinder is provided with a screw, which includes a threaded end and a smooth end. The screw passes through the top of the cylinder and into the cylinder body. The threaded end passes through a positioning hole and is threaded into a threaded groove. The throttling slide has a sliding hole or sliding groove for the screw to pass through.

[0009] Preferably, when the throttling slide has a groove for the screw to pass through, the groove is formed on the side wall of the throttling slide; When the throttling slide has a sliding hole for the screw to pass through, the sliding hole is located on the surface of the throttling slide near its own edge.

[0010] Preferably, the cylinder includes a cylinder body and a sealing plate, the sealing plate abutting against the end of the cylinder body away from the valve body, the sealing plate having a fixing hole for the screw to pass through, and the through hole being formed on the surface of the sealing plate.

[0011] Preferably, the valve body has a boss at the top, the air inlet and outlet are located at the center of the boss, and the bottom of the cylinder is sleeved around the boss.

[0012] Preferably, the threaded groove is formed at the top of the boss, and a positioning plate is provided inside the cylinder. Multiple sets of positioning plates are arranged in a ring array on the inner wall of the cylinder. The positioning plate abuts against the top of the boss, and the positioning hole is formed on the positioning plate.

[0013] Preferably, the throttling slide is made of either stainless steel or plastic.

[0014] In summary, this utility model has the following beneficial technical effects: 1. The valve body of this application is provided with a cylinder at the top that communicates with the air inlet and outlet, and a throttling slide is slidably connected in the vertical direction inside the cylinder. The vent hole diameter on the throttling slide is smaller than the through hole diameter. When the water flow velocity in the water pipeline is high, the air in the water pipeline rushes towards the air inlet and outlet. At this time, the throttling slide slides to the top of the cylinder under the force of the airflow and is in a state of abutting against the cylinder at the through hole. The air in the water pipeline can only flow out from the vent hole with the smaller diameter, thereby limiting the air discharge speed in the water pipeline, maintaining the stable pressure change in the water pipeline, and thus reducing the occurrence of water hammer.

[0015] 2. In this application, the cylinder is fixed to the valve body by a screw, and the screw includes a threaded end and a smooth end. The threaded end is used to thread the threaded groove on the valve body. The throttling slide has a sliding hole or groove for the screw to pass through, and the smooth end serves as a guide for the throttling slide.

[0016] 3. The valve body in this application has a boss at the top, and the bottom of the cylinder is fitted around the boss, thereby making the position of the cylinder more stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an adjustable exhaust volume anti-sealing water hammer inlet and outlet valve provided by this utility model; Figure 2 This is a cross-sectional structural diagram of an adjustable exhaust volume anti-sealing water hammer inlet and outlet valve. Figure 3 This is a schematic diagram of the structure of the throttling slide with a groove; Figure 4 This is a schematic diagram of the structure of a throttling slide with a sliding hole.

[0018] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Boss; 111. Inlet / outlet port; 112. Threaded groove; 2. Cylinder; 21. Cylinder body; 211. Positioning plate; 212. Positioning hole; 22. Sealing plate; 221. Through hole; 222. Fixing hole; 3. Throttling slide; 31. Vent hole; 32. Sliding hole; 33. Sliding groove; 4. Screw; 41. Threaded end; 42. Smooth end. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0020] This utility model provides an adjustable exhaust volume anti-jamming water hammer inlet and outlet valve structure. (Refer to...) Figure 1 and Figure 2 An adjustable exhaust volume anti-clogging water hammer inlet and outlet valve structure includes a valve body 1, a cylinder 2, and a throttling slide 3. The valve body 1 has an inlet and outlet port 111 at its top. The cylinder 2 is installed vertically upwards at the top of the valve body 1, and a through hole 221 is provided at the top of the cylinder 2, which is connected to the inlet and outlet port 111. The throttling slide 3 is slidably disposed within the cylinder 2 along its central axis. The throttling slide 3 has a vent hole 31, and the diameter of the vent hole 31 is smaller than the diameter of the through hole 221. In the initial state, the throttling slide 3 is located at the bottom of the cylinder 21. The throttling slide 3 is made of either stainless steel or plastic. When plastic is used for the throttling slide 3, a hard plastic should be selected. In the initial stage of pumping up the water pipeline, the water flow velocity and air flow velocity are both low. The air in the water pipeline is discharged to the external environment through the air inlet / outlet 111, the gap between the inner wall of the cylinder 2 and the throttling slide 3, the vent 31, and the through hole 221. As the water flow velocity in the water pipeline increases, the air in the water pipeline rushes towards the air inlet / outlet 111. Under the force of the airflow, the throttling slide 3 slides to the top of the cylinder 2 and is in contact with the cylinder 2 at the through hole 221. The air in the water pipeline can only flow out through the smaller vent 31, thus limiting the air discharge speed in the water pipeline and maintaining stable pressure changes in the water pipeline, thereby reducing the occurrence of water hammer. After the air in the water pipeline has been discharged, the water flows slowly into the valve body 1, at which point the throttling slide 3 returns to its initial position.

[0021] Reference Figure 1 and Figure 2 The cylinder 2 includes a cylinder body 21 and a sealing plate 22, wherein the sealing plate 22 abuts against the end of the cylinder body 21 away from the valve body 1, that is, the sealing plate 22 is disposed at the top of the cylinder body 21, and the through hole 221 is opened at the center of the sealing plate 22. In this embodiment, the cylinder body 2 is preferably cylindrical, the throttling slide 3 is preferably disc-shaped, and the top of the valve body 1 is provided with a boss 11, and the inlet and outlet port 111 is located at the center of the boss 11. In this embodiment, the boss 11 is preferably frustum-shaped. The bottom end of the cylinder 2 is fitted around the boss 11, and the boss 11 stabilizes the position of the cylinder 2. The top of the boss 11 is provided with a threaded groove 112. There are multiple sets of threaded grooves 112. In this embodiment, four sets of threaded grooves 112 are preferably provided. The four sets of threaded grooves 112 are arranged in a ring around the inlet and outlet holes 111. The inner wall of the cylinder 21 is fixedly connected with positioning pieces 211 corresponding to the threaded grooves 112. The four sets of positioning pieces 211 are arranged in a ring on the inner wall of the cylinder 21. The positioning pieces 211 are respectively provided with positioning holes 212 corresponding to the threaded grooves 112. The positioning pieces 211 abut against the top of the boss 11, and the positioning holes 212 and the threaded grooves 112 are connected to screws 4 to connect the cylinder 2 and the valve body 1.

[0022] Reference Figure 1 and Figure 2 The screw 4 includes a threaded end 41 and a smooth end 42. The sealing plate 22 has a fixing hole 222 for the screw 4 to pass through. The threaded end 41 of the screw 4 passes through the fixing hole 222 of the sealing plate 22 located at the top of the cylinder 21 to the positioning hole 212 and is threaded into the thread groove 112. At this time, the bottom surface of the head of the screw 4 abuts against the surface of the sealing plate 22, and the smooth end 42 of the screw 4 is located between the positioning piece 211 and the sealing plate 22.

[0023] Reference Figure 3 and Figure 4The throttling slide 3 has a sliding hole 32 or a sliding groove 33 for the screw 4 to pass through, that is, the smooth end 42 of the screw 4 plays a guiding role in the sliding of the throttling slide 3; When the throttling slide 3 has a groove 33, the groove 33 is formed on the side wall of the throttling slide 3; when the throttling slide 3 has a hole 32, the hole 32 is formed on the surface of the throttling slide 3 near its own edge.

[0024] The implementation principle of this utility model of an adjustable exhaust volume anti-sealing water hammer inlet and outlet valve structure is as follows: In the initial state, the throttling slide 3 is located at the bottom end of the valve body 1, that is, the throttling slide 3 abuts against the surface of the positioning plate 211. During the initial pump start-up of the water pipeline, due to the low water flow velocity and low air flow velocity within the pipeline, the air in the pipeline is discharged to the external environment through the air inlet / outlet port 111, the gap between the inner wall of the cylinder 2 and the throttling slide 3, the vent 31, and the through hole 221. As the water flow velocity in the pipeline increases, the air in the pipeline rapidly rushes towards the air inlet / outlet port 111, and the throttling slide... 3. Under the force of the airflow, it slides to the top of the cylinder 2 and is in contact with the cylinder 2 at the through hole 221. The air in the water pipeline can only flow out through the vent 31 with a smaller diameter, which limits the air discharge speed in the water pipeline and maintains the stable pressure change in the water pipeline, thereby reducing the occurrence of water hammer. After the air in the water pipeline is discharged, the water flows slowly into the valve body 1. As the air inlet and outlet holes 111 of the valve body 1 are closed, the throttling slide 3 returns to the initial position.

[0025] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A water hammer inlet and outlet valve structure with adjustable exhaust volume, characterized in that, include, Valve body (1), the top of the valve body (1) is provided with an air inlet and outlet hole (111); The cylinder (2) is vertically installed at the top of the valve body (1). A through hole (221) is provided at the end of the cylinder (2) away from the valve body (1). The through hole (221) is connected to the inlet and outlet holes (111). The throttling slide (3) slides vertically inside the cylinder (2). The throttling slide (3) has a vent hole (31), the diameter of which is smaller than that of the through hole (221).

2. The adjustable displacement anti-mit valve structure according to claim 1, wherein The valve body (1) has a threaded groove (112) at the top. There are multiple sets of the threaded groove (112), and the multiple sets of the threaded groove (112) are arranged in a ring around the circumference of the inlet and outlet holes (111). The cylinder (2) is provided with a positioning hole (212) corresponding to the threaded groove (112). The cylinder (2) is provided with a screw (4), which includes a threaded end (41) and a smooth end (42). The screw (4) extends from the top of the cylinder (2) into the cylinder (2). The threaded end (41) passes through the positioning hole (212) and is threaded into the threaded groove (112). The throttling slide (3) is provided with a sliding hole (32) or a sliding groove (33) for the screw (4) to pass through.

3. The adjustable displacement anti-mit valve structure according to claim 2, wherein When the throttling slide (3) is provided with a groove (33) for the screw (4) to pass through, the groove (33) is provided on the side wall of the throttling slide (3); When the throttling slide (3) has a sliding hole (32) for the screw (4) to pass through, the sliding hole (32) is opened on the surface of the throttling slide (3) near its own edge.

4. The adjustable exhaust volume anti-sealing water hammer inlet and outlet valve structure according to claim 2, characterized in that, The cylinder (2) includes a cylinder body (21) and a sealing plate (22). The sealing plate (22) abuts against the end of the cylinder body (21) away from the valve body (1). The sealing plate (22) has a fixing hole (222) for the screw (4) to pass through. The through hole (221) is opened on the surface of the sealing plate (22).

5. The adjustable displacement anti-mit valve structure according to claim 4, wherein The valve body (1) has a boss (11) at the top, the air inlet and outlet (111) is located at the center of the boss (11), and the bottom end of the cylinder (2) is sleeved around the boss (11).

6. The adjustable exhaust volume anti-sealing water hammer inlet and outlet valve structure according to claim 5, characterized in that, The threaded groove (112) is opened at the top of the boss (11). The cylinder body (21) is provided with a positioning piece (211). There are multiple sets of positioning pieces (211). The multiple sets of positioning pieces (211) are arranged in a ring array on the inner wall of the cylinder body (21). The positioning piece (211) abuts against the top of the boss (11). The positioning hole (212) is opened on the positioning piece (211).

7. The adjustable exhaust volume anti-sealing water hammer inlet and outlet valve structure according to claim 1, characterized in that, The throttling slide (3) is made of either stainless steel or plastic.

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