A PPH dual union ball valve structure resistant to acid and alkali

Abstract

This utility model relates to a double-union ball valve structure, specifically an acid and alkali resistant PPH double-union ball valve structure, including a valve seat; a valve body; a channel formed on the valve body; a lever installed on the valve body; rotation of the lever can drive the valve body to rotate, thereby driving the channel to rotate; when the channel is perpendicular to the valve seat, the ball valve is in a blocked state; and when the channel is parallel to the valve seat, the ball valve is in a conducting state; a connecting pipe; disposed at both ends of the valve seat, the connecting pipe is used for fixed connection with the pipeline; it also includes a fastening sleeve that is threaded to the valve seat and abuts against the connecting pipe; a buffer element, disposed at the water-facing end of the valve seat; the buffer element is used to weaken the pressure wave in the pipeline; when the medium flows, it will first contact the buffer element; through the buffering effect of the buffer element, the pressure wave in the pipeline can be effectively offset, thereby improving the stability and safety of the ball valve structure and improving the effective control of the medium flow.

Description

Technical Field

[0001] This utility model relates to a dual union ball valve structure, specifically an acid and alkali resistant PPH dual union ball valve structure. Background Technology

[0002] Valves are control components in fluid transport systems, used to open and close pipelines, regulate flow direction, and control medium parameters (such as temperature, pressure, and flow rate). They have functions such as shut-off, flow diversion, and pressure stabilization. Valves include ball valves, butterfly valves, etc. Among them, the double-union ball valve is a ball valve with union joints at both ends. Its opening and closing element is a ball, which can be quickly opened and closed by rotating 90°. It is mainly used for fluid control in pipeline systems. Due to its characteristics of quick installation and replacement, it is widely used in chemical, water treatment and other fields.

[0003] A common dual-ruling ball valve includes a valve seat with connecting pipes at both ends for fixed connection to the pipeline system. These pipes are connected to the valve seat via threaded fastening sleeves. A spherical valve body is rotatably sealed inside the valve seat, and a channel is provided on the valve body. When the spherical valve body is rotated, causing the channel to rotate parallel to the valve seat, the ball valve structure is in a conducting state. When the valve body is perpendicular to the valve seat, the ball valve structure is in a blocking state.

[0004] A typical pipeline system contains multiple ball valve structures, which are interconnected. The flow of the medium is controlled by opening or closing each ball valve structure. Usually, the mutual influence between the ball valve structures is small. However, when the pipeline system suddenly starts or stops the pump or quickly closes other valves, water hammer pressure waves may be generated, which may impact the ball valve body and cause it to rotate (usually having a greater impact on normally closed ball valve structures). Or, when the medium flow velocity in the pipeline system is extremely high or there is an asymmetric flow field (such as a ball valve directly connected after an elbow), a rotational torque may also be generated on the ball valve body. These situations may cause the ball valve structure to open or close unexpectedly, which is not conducive to the effective control of the medium flow. Utility Model Content

[0005] The purpose of this invention is to provide an acid and alkali resistant PPH dual union ball valve structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A PPH dual union ball valve structure resistant to acid and alkali includes a valve seat; a valve body is rotatably and sealingly installed inside the valve seat;

[0008] The valve body has a channel;

[0009] A lever is installed on the valve body;

[0010] The rotation of the lever can drive the valve body to rotate, thereby driving the channel to rotate; and when the channel is perpendicular to the valve seat, the ball valve is in a blocked state; while when the channel is parallel to the valve seat, the ball valve is in a conducting state.

[0011] Connecting pipes are disposed at both ends of the valve seat and are used for fixed connection with the pipeline.

[0012] It also includes a fastening sleeve that is threaded to the valve seat and abuts against the connecting pipe;

[0013] A buffer element is disposed at the water-facing end of the valve seat; the buffer element is used to weaken pressure waves in the pipeline.

[0014] The acid and alkali resistant PPH dual union ball valve structure described above: the buffer includes a fixed block installed in the valve seat, the fixed block having multiple sets of through grooves; the multiple sets of through grooves are equidistantly arranged along the circumference of the fixed block; a buffer plate is slidably fitted in the fixed block; and a buffer spring is provided in the fixed block; the two ends of the buffer spring respectively abut against the buffer plate and the fixed block.

[0015] The acid and alkali resistant PPH dual union ball valve structure described above: the sum of the maximum effective conduction areas of the multiple sets of through grooves is greater than the maximum effective conduction area of ​​the valve seat.

[0016] The acid and alkali resistant PPH dual union ball valve structure described above has the following features: symmetrical grooves are provided on the valve body; a slider is slidably fitted into the groove; an abutment spring is provided in the groove; and the two ends of the abutment spring abut against the slider and the valve body, respectively.

[0017] The acid and alkali resistant PPH double union ball valve structure described above: both ends of the valve seat are equipped with gaskets that abut against the connecting pipe.

[0018] The acid and alkali resistant PPH double union ball valve structure described above: a ramp is installed inside the valve seat.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the buffer is set at the water-facing end of the valve seat, so when the medium flows, it will first contact the buffer; through the buffering effect of the buffer, the pressure wave in the pipeline can be effectively offset, thereby avoiding the water hammer pressure wave from directly impacting the valve body due to the sudden start-up or shutdown of the pump or the rapid closure of other valves in the pipeline system, causing the valve body to rotate and changing the conduction state of the ball valve, thereby improving the stability and safety of the ball valve structure and improving the effective control of the medium flow. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a PPH double union ball valve that is resistant to acids and alkalis.

[0021] Figure 2 This is a cross-sectional view of the structure of the PPH double union ball valve, which is resistant to acids and alkalis.

[0022] Figure 3 This is a schematic diagram of the structure of the acid and alkali resistant PPH double union ball valve from another cross-sectional perspective.

[0023] Figure 4 A schematic diagram of the PPH dual-ruler ball valve structure from an explosion perspective.

[0024] Figure 5 for Figure 4 A structural diagram from another perspective.

[0025] In the diagram: 1. Valve seat; 101. Ramp;

[0026] 2. Valve body; 201. Channel; 202. Slide groove;

[0027] 3. Lever;

[0028] 4. Connecting pipe;

[0029] 5. Gaskets;

[0030] 6. Tighten the sleeve;

[0031] 7. Fixing block; 701. Through groove;

[0032] 8. Buffer plate;

[0033] 9. Buffer spring;

[0034] 10. Slider;

[0035] 11. Resistance spring. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] Please see Figures 1-5 As one embodiment of this utility model, the acid and alkali resistant PPH double union ball valve structure includes a valve seat 1; a valve body 2 is rotatably and sealingly installed inside the valve seat 1.

[0038] The valve body 2 is provided with a channel 201;

[0039] A lever 3 is installed on the valve body 2;

[0040] The rotation of the lever 3 can drive the valve body 2 to rotate, thereby driving the channel 201 to rotate; and when the channel 201 is perpendicular to the valve seat 1, the ball valve is in a blocked state; while when the channel 201 is parallel to the valve seat 1, the ball valve is in a conducting state.

[0041] Connecting pipe 4; disposed at both ends of the valve seat 1, the connecting pipe 4 is used for fixed connection with the pipeline;

[0042] It also includes a fastening sleeve 6 that is threaded to the valve seat 1 and abuts against the connecting pipe 4;

[0043] A buffer element is provided at the water-facing end of the valve seat 1; the buffer element is used to weaken the pressure wave in the pipeline.

[0044] In this embodiment, the connecting pipe 4 is first welded to the pipeline; then the connecting pipe 4 and the valve seat 1 are connected by the threaded engagement of the fastening sleeve 6 and the valve seat 1; and after connection, there is a large compressive force between the fastening sleeve 6 and the connecting pipe 4 to avoid leakage due to loose connection.

[0045] The valve seat 1, valve body 2, connecting pipe 4, and fastening sleeve 6 are all made of acid and alkali resistant PPH material, which can effectively improve the service life of the ball valve structure.

[0046] In use, the valve body 2 is rotated synchronously by rotating the lever 3, and the length direction of the lever 3 is parallel to the length direction of the channel 201; therefore, by observing the position of the lever 3, the conduction state of the ball valve can be easily determined, which can effectively avoid the ball valve from opening or closing due to misjudgment.

[0047] The valve body 2 is spherical. Therefore, when the lever 3 is rotated to make the channel 201 parallel to the valve seat 1, the valve body 2 is still sealed to the valve seat 1. At this time, when the medium flows, it will flow to the other end through the channel 201. When the lever 3 is rotated to make the channel 201 perpendicular to the valve seat 1, the spherical side of the valve body 2 will block the valve seat 1. The spherical feature of the valve body 2 can reduce the interference of water pressure on the position of the valve body 2.

[0048] The buffer element is located at the water-facing end of the valve seat 1, so when the medium flows, it will first come into contact with the buffer element. Through the buffering effect of the buffer element, the pressure wave in the pipeline can be effectively offset, thereby preventing the water hammer pressure wave from directly impacting the valve body 2 due to the sudden start-up or shutdown of the pump or the rapid closure of other valves in the pipeline system, causing the valve body 2 to rotate and change the conduction state of the ball valve, thereby improving the stability and safety of the ball valve structure.

[0049] As a further embodiment of this utility model, the buffer includes a fixing block 7 installed in the valve seat 1, and the fixing block 7 has multiple sets of through grooves 701; the multiple sets of through grooves 701 are equidistantly arranged along the circumference of the fixing block 7; a buffer plate 8 is slidably fitted in the fixing block 7; and a buffer spring 9 is provided in the fixing block 7; the two ends of the buffer spring 9 respectively abut against the buffer plate 8 and the fixing block 7.

[0050] In this embodiment, in the initial state, the buffer plate 8 will block the through groove 701 under the elastic force of the buffer spring 9.

[0051] When the lever 3 is rotated to put the ball valve structure in the conducting state, the flowing medium will push the buffer plate 8 to slide inward in the fixed block 7 and compress the buffer spring 9; as the buffer plate 8 moves, the conducting area of ​​the through groove 701 will gradually increase; therefore, the medium can flow through the through groove 701 towards the valve body 2, and will flow through the channel 201 towards the other end of the valve seat 1.

[0052] When the ball valve structure is in a blocked state, if a large pressure fluctuation occurs in the pipeline system, the pressure wave is transmitted to the buffer plate 8 through the medium. The spring force of the buffer spring 9 effectively weakens the pressure wave. Furthermore, the buffer element prevents the medium from directly contacting the valve body 2, thereby reducing the impact of medium flow on the valve body 2. Simultaneously, the buffer element effectively prevents medium backflow, thus improving the cleanliness of the pipeline system.

[0053] The buffer element is located at the water-facing end of the valve seat 1, so when the medium flows, it will first come into contact with the buffer element. Through the buffering effect of the buffer element, the pressure wave in the pipeline can be effectively offset, thereby preventing the water hammer pressure wave from directly impacting the valve body 2 due to the sudden start-up or shutdown of the pump or the rapid closure of other valves in the pipeline system, causing the valve body 2 to rotate and change the conduction state of the ball valve, thereby improving the stability and safety of the ball valve structure.

[0054] As a further embodiment of this utility model, the sum of the maximum effective conduction areas of the multiple sets of through grooves 701 is greater than the maximum effective conduction area of ​​the valve seat 1.

[0055] In this embodiment, since the sum of the maximum effective conduction areas of the through grooves 701 is greater than the sum of the maximum effective conduction areas of the valve seat 1, the flow rate of the medium does not change significantly after passing through the buffer, thereby ensuring the flow rate of the medium and ensuring that the ball valve structure can meet the usage requirements.

[0056] The buffer element is located at the water-facing end of the valve seat 1, so when the medium flows, it will first come into contact with the buffer element. Through the buffering effect of the buffer element, the pressure wave in the pipeline can be effectively offset, thereby preventing the water hammer pressure wave from directly impacting the valve body 2 due to the sudden start-up or shutdown of the pump or the rapid closure of other valves in the pipeline system, causing the valve body 2 to rotate and change the conduction state of the ball valve, thereby improving the stability and safety of the ball valve structure.

[0057] As a further embodiment of this utility model, the valve body 2 is provided with symmetrically arranged sliding grooves 202; a slider 10 is slidably fitted in the sliding groove 202; an abutment spring 11 is provided in the sliding groove 202; the two ends of the abutment spring 11 abut against the slider 10 and the valve body 2 respectively.

[0058] In this embodiment, rotating the lever 3 causes the valve body 2 to rotate (the channel 201 changes from the vertical valve seat 1 state to the parallel valve seat 1 state). During this process, the slider 10 will contact the valve seat 1.

[0059] The slider 10 is inclined on both sides, so when it comes into contact with the valve seat 1, the squeezing force of the valve seat 1 on the slider 10 will cause the slider 10 to slide inward in the slide groove 202 and compress the abutment spring 11. The elastic force of the abutment spring 11 will increase as its compression increases.

[0060] When channel 201 is parallel to valve seat 1, slider 10 will be in close contact with valve seat 1 under the elastic force of contact spring 11, thereby increasing the resistance to rotation of valve body 2. When the medium flow velocity in the pipeline system is extremely high or the flow field is asymmetrical (such as ball valve directly connected after elbow), the rotational torque generated on the ball cannot easily drive valve body 2 to rotate, thus ensuring the stability of medium flow and avoiding accidental blockage of ball valve structure.

[0061] As a further embodiment of this utility model, gaskets 5 that abut against the connecting pipe 4 are installed at both ends of the valve seat 1.

[0062] In this embodiment, during the threaded engagement of the fastening sleeve 6 and the valve seat 1, the fastening sleeve 6 will abut against the connecting pipe 4, thereby gradually shortening the distance between the connecting pipe 4 and the valve seat 1; during this process, the gasket 5 will be gradually compressed and deformed; by deforming the gasket 5 under force to increase the sealing between the connecting pipe 4 and the valve seat 1, leakage can be effectively avoided, thereby improving the stability of the ball valve structure.

[0063] As a further embodiment of this utility model, a ramp 101 is installed inside the valve seat 1.

[0064] In this embodiment, since the inner diameter of the valve seat 1 is larger than the inner diameter of the channel 201, a transition is made through the ramp 101. That is, when the medium flows, some of the medium will flow to the channel 201 through the guiding effect of the ramp 101, thereby reducing the pressure inside the valve seat 1 and preventing the ball valve structure from being deformed and damaged due to pressure.

[0065] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. An acid and alkali resistant PPH double union ball valve structure, characterized in that, Includes a valve seat (1); a valve body (2) is rotatably and sealingly installed inside the valve seat (1); The valve body (2) has a channel (201); A lever (3) is installed on the valve body (2); The rotation of the lever (3) can drive the valve body (2) to rotate, thereby driving the channel (201) to rotate; and when the channel (201) is perpendicular to the valve seat (1), the ball valve is in a blocked state; while when the channel (201) is parallel to the valve seat (1), the ball valve is in a conducting state. Connecting pipe (4); disposed at both ends of the valve seat (1), the connecting pipe (4) is used for fixed connection with the pipeline; It also includes a fastening sleeve (6) that is threaded to the valve seat (1) and abuts against the connecting pipe (4); A buffer element is provided at the water-facing end of the valve seat (1); the buffer element is used to weaken the pressure wave in the pipeline.

2. The acid and alkali resistant PPH double union ball valve structure according to claim 1, characterized in that, The buffer component includes a fixed block (7) installed in the valve seat (1), and multiple sets of through grooves (701) are opened in the fixed block (7); the multiple sets of through grooves (701) are equidistantly arranged along the circumference of the fixed block (7); a buffer plate (8) is slidably fitted in the fixed block (7); and a buffer spring (9) is provided in the fixed block (7); the two ends of the buffer spring (9) respectively abut against the buffer plate (8) and the fixed block (7).

3. The acid and alkali resistant PPH double union ball valve structure according to claim 2, characterized in that, The sum of the maximum effective conduction areas of the multiple sets of through grooves (701) is greater than the maximum effective conduction area of ​​the valve seat (1).

4. The acid and alkali resistant PPH double union ball valve structure according to claim 1, characterized in that, The valve body (2) is symmetrically provided with sliding grooves (202); a slider (10) is slidably fitted in the sliding groove (202); an abutment spring (11) is provided in the sliding groove (202); the two ends of the abutment spring (11) abut against the slider (10) and the valve body (2) respectively.

5. The acid and alkali resistant PPH double union ball valve structure according to claim 1, characterized in that, Both ends of the valve seat (1) are fitted with gaskets (5) that abut against the connecting pipe (4).

6. The acid and alkali resistant PPH double union ball valve structure according to claim 1, characterized in that, A ramp (101) is installed inside the valve seat (1).

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