A gas supplement valve and pneumatic conveying assembly

Abstract

This utility model discloses an air replenishment valve and a pneumatic conveying assembly. The air replenishment valve includes a valve housing and a valve core assembly. The valve housing has a chamber, an air inlet, and an air outlet, both of which are connected to the chamber. The valve core assembly is movably disposed within the chamber, and the pressure-receiving area of ​​the valve core assembly at the air inlet end is smaller than the pressure-receiving area at the air outlet end. The valve core assembly is used to move under the pressure difference between the air inlet and the air outlet to either disconnect or connect the air inlet and the air outlet. The valve core assembly of this air replenishment valve can automatically switch to an open or closed state according to the pressure difference changes at the air inlet and the air outlet.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic conveying technology, and in particular relates to an air replenishment valve and a pneumatic conveying component. Background Technology

[0002] In pneumatic pipeline transportation projects, to save compressed air and prevent pipe blockage, air replenishment valves are installed on pneumatic delivery pipes in various new and renovation projects. However, current air replenishment valves often have design flaws in their air inlet sections. The main issue is that the air pipe connector mounting hole is located on the part that adjusts the spring pressure. For example, the air replenishment valve disclosed in document CN219345600U, "A Pilot-Operated Automatic One-Way Air Replenishment Valve," often suffers from misalignment of the adjusting parts during air pipe connector installation due to varying worker skill levels. This necessitates recalibrating the air replenishment device, adding unnecessary adjustment and calibration work. Furthermore, the lack of calibration facilities in production workshops on-site reduces the accuracy of recalibration, affecting the final installation quality. Additionally, when the pressure cap needs to be rotated due to operational conditions, the pipe installed on top often interferes with the adjustment. After rotation, the rebound torque of the pipe may cause the adjustment amount to revert or twist the pipe, affecting ventilation efficiency and aesthetics. Moreover, each adjustment requires additional pipe readjustment. Utility Model Content

[0003] To solve the above-mentioned technical problems, one of the objectives of this utility model is to provide a simple air supply valve with good reliability during use.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: an air replenishment valve, comprising:

[0005] The valve housing has a chamber, an air inlet, and an air outlet, both of which are connected to the chamber.

[0006] A valve core assembly is movably disposed in the chamber, wherein the pressure-bearing area of ​​the valve core assembly at the end corresponding to the air inlet is smaller than the pressure-bearing area of ​​the valve core assembly at the end corresponding to the exhaust outlet.

[0007] The valve core assembly is used to move under the action of the pressure difference between the air inlet and the exhaust port to disconnect or open the air inlet and the exhaust port.

[0008] The beneficial effects of this utility model are as follows: When the air replenishment valve is running, the pressure at its air inlet end must always be greater than the pressure at its exhaust end. The pressure value of the valve core assembly near the exhaust end is F2, while the pressure value of the valve core assembly near the air inlet end is F1. The pressure-bearing area of ​​the valve core assembly at the air inlet end is smaller than the pressure-bearing area of ​​the valve core assembly at the exhaust end end. This means that even when the pressure at the exhaust end is lower than the pressure at the air inlet, F2 may still be greater than F1. Once F2 > F1, the valve core assembly moves to connect the air inlet and exhaust end, and the airflow flows from the air inlet to the exhaust end. When F2 ≤ F1, the valve core assembly is in a state of isolating the air inlet and exhaust end.

[0009] Based on the above technical solution, the present invention can be further improved as follows:

[0010] Furthermore, the valve core assembly includes a first valve core and a second valve core, the first valve core and the second valve core are linked in the chamber, the first valve core is close to the air inlet and the second valve core is close to the exhaust port;

[0011] The pressure-bearing area of ​​the first valve core is the pressure-bearing area of ​​the valve core assembly at the end corresponding to the air inlet, and the pressure-bearing area of ​​the second valve core is the pressure-bearing area of ​​the valve core assembly at the end corresponding to the exhaust outlet.

[0012] The beneficial effect of the above-mentioned further technical solution is that the pressure-bearing area of ​​the second valve core is the same as the pressure-bearing area of ​​the valve core assembly at the end corresponding to the exhaust port, while the pressure-bearing area of ​​the first valve core is the same as the pressure-bearing area of ​​the valve core assembly at the end corresponding to the air inlet. Furthermore, the first valve core and the second valve core are linked in the chamber, resulting in poor mutual interference.

[0013] Furthermore, the chamber includes a first valve chamber, a second valve chamber, and a channel; the air inlet communicates with the first valve chamber, the air outlet communicates with the second valve chamber, and the channel connects the first valve chamber and the second valve chamber.

[0014] The first valve core is movably disposed in the first valve cavity and tends to move to seal the channel. The second valve core is movably disposed in the second valve cavity and has a lifting portion extending into the channel. The second valve core is linked with the first valve core through the lifting portion.

[0015] The beneficial effect of the above-mentioned further technical solution is that the first valve core and the second valve core are located in the first valve cavity and the second valve cavity respectively, with poor mutual interference, and the second valve core achieves linkage with the first valve core through the lifting part on it.

[0016] Furthermore, the valve core assembly also includes an elastic element disposed within the first valve cavity, the elastic force of which acts on the first valve core to compress the first valve core to move it to close the channel.

[0017] The beneficial effect of the above-mentioned further technical solution is that the elastic element can apply a force to the first valve core that tends to move and close the channel, thus preventing the first valve core from accidentally opening the channel.

[0018] Furthermore, the first valve core is provided with an indicator rod;

[0019] The valve housing is provided with a sliding hole that communicates with the first valve cavity;

[0020] The indicator rod extends through the sliding hole and slidably protrudes into the valve housing.

[0021] The beneficial effect of the above-mentioned further technical solution is that it allows the operator to determine whether the first valve core is in the open or closed state by the length of the indicator rod extending outside the valve body, and the indicator rod can also guide the movement direction of the first valve core.

[0022] Furthermore, a flexible gasket is provided on the side of the first valve core near the channel.

[0023] The beneficial effects of the above-mentioned further technical solution are as follows: Multiple air inlets allow for more flexible piping; one inlet can be selected for air supply, while the remaining inlets can be sealed with plugs. The flexible gasket on the first valve core improves the sealing performance when the channel is closed, preventing the air supply valve from failing to close properly. Furthermore, the exhaust port is located on the side of the second valve core opposite to the first valve core. This makes the entire air supply valve easier to install.

[0024] Furthermore, the second valve core has an air passage for connecting the first valve chamber and the second valve chamber when the first valve core moves to open the passage.

[0025] The beneficial effect of the above-mentioned further technical solution is that when the first valve core is in the open state, the airflow enters the first valve chamber, then enters the second valve chamber through the air passage, and finally exits through the exhaust port.

[0026] Further, the valve housing includes:

[0027] The valve body has a first chamber, a second chamber, and the channel, and the first chamber and the second chamber are connected through the channel;

[0028] The first valve cover and the sealing cover are located at the opening of the first slot chamber and together they enclose the first valve cavity.

[0029] The second valve cover, with a sealing cover, is located at the opening of the second groove chamber to jointly enclose and form the second valve cavity;

[0030] The air inlet is located on the valve body or the first valve cover, and the exhaust port is located on the valve body or the second valve cover.

[0031] The beneficial effect of the above-mentioned further technical solution is that it makes the entire valve body processing and assembly more convenient.

[0032] The second objective of this utility model is to provide a pneumatic conveying component with a simple structure and convenient function in clearing blockages.

[0033] To achieve the above objectives, another technical solution of this utility model is as follows: a pneumatic conveying assembly, comprising a pneumatic conveying pipe and an air replenishment valve as described above;

[0034] The pneumatic conveying pipe has an air inlet on its wall, and the exhaust port is connected to the air inlet.

[0035] The air inlet is used to introduce compressed airflow.

[0036] The beneficial effect of this utility model is that when the pneumatic conveying pipe is blocked at the downstream position of the air supply valve, the upstream of the pneumatic conveying pipe will be compressed, causing the pressure to gradually increase. When F2>F1, the valve core assembly will move to connect the air inlet and the air outlet. At this time, the compressed airflow flows into the pneumatic conveying pipe and clears the blockage.

[0037] Based on the above technical solution, the present invention can be further improved as follows:

[0038] Furthermore, the air inlet is inclinedly arranged on the pneumatic conveying pipe, and the angle between the air inlet and the material inlet direction of the pneumatic conveying pipe is an acute angle.

[0039] The beneficial effect of the above-mentioned further technical solution is that the compressed air flow delivered by the air inlet can work together with the air flow in the pneumatic delivery pipe to impact and clear the blockage. Attached Figure Description

[0040] Figure 1 This is a cross-sectional view of the air supply valve in the open state according to an embodiment of the present invention;

[0041] Figure 2 This is a cross-sectional view of the air supply valve in the closed state according to an embodiment of the present invention;

[0042] Figure 3 This is a cross-sectional view of the valve housing described in an embodiment of the present utility model;

[0043] Figure 4This is a cross-sectional view of the valve body, the first valve cover, and the second valve cover as described in this embodiment of the present invention, when they are separated.

[0044] Figure 5 This is a cross-sectional view of the pneumatic conveying assembly described in an embodiment of the present invention.

[0045] In the diagram: 10, Air supply valve; 11, Valve housing; 111, Chamber; 1111, First valve chamber; 1112, Second valve chamber; 1113, Channel; 1114, Receiving cavity; 112, Air inlet; 113, Exhaust outlet; 114, Sliding hole; 115, Valve body; 1151, First slot chamber; 1152, Second slot chamber; 1161, First valve cover; 1162, Second valve cover; 12, Valve core assembly; 121, First valve core; 1211, Marking rod; 12111, Limiting part; 12112, Marking ring; 1212, Flexible gasket; 122, Second valve core; 1221, Lifting part; 1222, Air passage; 123, Elastic element; 20, Pneumatic delivery pipe; 21, Air supply port; 30, Blockage point. Detailed Implementation

[0046] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0047] One aspect of this utility model provides an air replenishment valve, such as Figures 1-4As shown, the air supply valve 10 includes a valve housing 11 and a valve core assembly 12. The valve housing 11 has a chamber 111, an air inlet 112, and an exhaust port 113. The air inlet 112 and the exhaust port 113 are both connected to the chamber 111. The valve core assembly 12 is movably disposed in the chamber 111. The pressure-bearing area of ​​the valve core assembly 12 at the end corresponding to the air inlet 112 is smaller than the pressure-bearing area at the end corresponding to the exhaust port 113. The valve core assembly 12 is used to move under the action of the pressure difference between the air inlet 112 and the exhaust port 113 to disconnect or connect the air inlet 112 and the exhaust port 113. When the air supply valve is in operation, the pressure at its inlet end must always be greater than the pressure at its outlet end. The pressure value of the valve core assembly near the outlet end is F2, while the pressure value of the valve core assembly near the inlet end is F1. The pressure-bearing area of ​​the valve core assembly at the inlet end is smaller than that at the outlet end. This means that even if the pressure at the outlet is lower than the pressure at the inlet, F2 may still be greater than F1. Once F2 > F1, the valve core assembly moves to connect the inlet and outlet, and the airflow flows from the inlet to the outlet. When F2 ≤ F1, the valve core assembly is in a state of isolating the inlet and outlet.

[0048] The operating principle of the air replenishment valve 10 in this embodiment is as follows:

[0049] According to the pressure calculation formula P=F / S, where P represents pressure, F represents force, and S represents the area under pressure, we can obtain F=P·S. Therefore, the magnitude of the pressure on an object is positively correlated with both pressure and the area under pressure. For the air supply valve 10 in this embodiment, the pressure of the compressed airflow (preferably compressed air) entering through its inlet 112 must be greater than the atmospheric pressure at the outlet 113. Otherwise, even if the valve core assembly is in a state of connecting the inlet and outlet, the compressed airflow at the inlet 112 cannot flow to the outlet 113; instead, the airflow at the outlet 113 flows towards the inlet 112. Since the pressure at the inlet 112 is greater than the pressure at the outlet 113... Under the premise of strong pressure, in order for the valve core assembly to move to open the chamber 111, the pressure-bearing area of ​​the valve core assembly 12 at the end corresponding to the air inlet 112 must be smaller than the pressure-bearing area of ​​the valve core assembly 12 at the end corresponding to the exhaust port 113. For example, if the pressure at the air inlet 112 is P1 and the pressure at the exhaust port 113 is P2, the pressure-bearing area of ​​the valve core assembly 12 at the end corresponding to the air inlet 112 is S1 and the pressure-bearing area of ​​the valve core assembly 12 at the end corresponding to the exhaust port 113 is S2, F1 = P1·S1 and F2 = P2·S2. P1 must be greater than P2. In this case, for F2 > F1, S2 must be greater than S1.

[0050] In some embodiments, such as Figure 1 and Figure 2 As shown, the chamber 111 includes a first valve chamber 1111, a second valve chamber 1112, and a channel 1113. The air inlet 112 communicates with the first valve chamber 1111, the exhaust port 113 communicates with the second valve chamber 1112, and the channel 1113 connects the first valve chamber 1111 and the second valve chamber 1112. The valve core assembly 12 includes a first valve core 121 and a second valve core 122. The first valve core 121 is movably disposed within the first valve chamber 1111 and tends to move to seal the channel 1113. The second valve core 122 is movably disposed within the second valve chamber 1112. The valve core 122 has a lifting portion 1221 extending into the channel 1113. The pressure-bearing area of ​​the second valve core 122 is the pressure-bearing area of ​​the valve core assembly 12 corresponding to the exhaust port 113, and the pressure-bearing area of ​​the first valve core 121 is the pressure-bearing area of ​​the valve core assembly 12 corresponding to the air inlet 112. Under the action of the pressure difference between the air inlet 112 and the exhaust port 113, the second valve core 122 can move to the lifting portion 1221 to push the first valve core 121 to open the channel 1113, or move to reset so that the first valve core 121 can restore the channel 1113 to its closed state. This results in the second valve core having the same pressure-bearing area as the valve core assembly at the end corresponding to the exhaust port, while the first valve core has the same pressure-bearing area as the valve core assembly at the end corresponding to the air inlet. The first and second valve cores are located in the first and second valve chambers respectively, resulting in poor mutual interference. Furthermore, the second valve core achieves linkage with the first valve core through its lifting portion.

[0051] The pressure-bearing area of ​​the first valve core 121 refers to the area corresponding to the orthographic projection of the first valve core 121 on the side away from the channel 1113. Similarly, the pressure-bearing area of ​​the second valve core 122 refers to the area corresponding to the orthographic projection of the second valve core 122 on the side away from the channel 1113.

[0052] Specifically, such as Figure 1 and Figure 2 As shown, in this embodiment, the first valve chamber 1111 and the second valve chamber 1112 are spaced apart along a first direction within the valve housing 11, and the channel 1113 is disposed between the first valve chamber 1111 and the second valve chamber 1112 along the first direction within the valve housing 11. Preferably, the first valve chamber 1111 and the second valve chamber 1112 are both cylindrical cavities and coaxially distributed. The two ends of the channel 1113 extend to communicate with the middle of the first valve chamber 1111 and the second valve chamber 1112, respectively. The air inlet 112 is disposed on the valve housing 11, and the opening direction of the air inlet 112 is perpendicular to the first direction.

[0053] In some embodiments, such as Figure 1 and Figure 2 As shown, in this embodiment, multiple air inlets 112 are provided. These multiple air inlets are distributed circumferentially around the first valve cavity. By providing multiple air inlets, the pipe layout can be more flexible. Air can be supplied to any one air inlet, while the remaining air inlets can be sealed with plugs. The air inlet 112 may be provided with internal threads. The plug is similar to a bolt and is threadedly connected to the air inlet 112.

[0054] More preferably, there are two air inlets, and the two air inlets are distributed opposite to each other.

[0055] In some embodiments, such as Figure 1 and Figure 2 As shown, in this embodiment, a flexible gasket 1212 is provided on the side of the first valve core 121 near the channel 1113. The flexible gasket on the first valve core improves the sealing performance when the channel is closed, preventing the air supply valve from not closing tightly.

[0056] The flexible gasket 1212 can be adhered to the first valve core 121 by adhesive. The flexible gasket 1212 can be a rubber gasket, a silicone gasket, or a latex gasket.

[0057] In some embodiments, the connection between the exhaust port 113 and the second valve chamber 1112 is located on the side of the second valve core 122 opposite to the channel 1113. This makes the installation of the entire air supply valve 10 more convenient.

[0058] Figures 1-4 In the middle, x represents the first direction.

[0059] like Figures 1-3 As shown, in some embodiments, the valve core assembly 12 further includes an elastic element 123 disposed within the first valve cavity 1111. The elastic force of the elastic element 123 acts on the first valve core 121, which compresses the first valve core 121 to tend to move and close the channel 1113 (in this embodiment, the direction of the force of the elastic element is consistent with the direction of movement of the first valve core). Thus, the elastic element can apply a force to the first valve core to tend to move and close the channel, thereby preventing the first valve core from accidentally opening the channel.

[0060] In this embodiment, the direction of the elastic force of the elastic element is the same as the direction of the force exerted by the pressure at the air inlet on the first valve core. Therefore, after setting the elastic element, the pressure difference between F2 and F1 needs to be further increased to overcome the elastic force of the elastic element so that the first valve core can open. (In this embodiment, the elastic force of the elastic element is not taken into account during theoretical analysis. In actual situation, the elastic force of the elastic element is F3. The first valve core will only open when F2 > F1 + F3).

[0061] In some embodiments, a receiving cavity 1114 may be provided inside the valve housing at the end of the first valve cavity opposite to the channel. The receiving cavity 1114 communicates with the first valve cavity 1111, and the elastic element 123 is disposed in the receiving cavity 1114. The elastic force of the elastic element 123 is used to squeeze the first valve core 121 to move and seal the channel 1113 (at this time, the end of the elastic element 123 near the first valve core 121 can directly abut against the first valve core 121, and the other end of the elastic element 123 can directly abut against the valve housing 11).

[0062] The accommodating cavity described in this embodiment can also be regarded as part of the first valve cavity, which is designed to accommodate the elastic element.

[0063] In some embodiments, the first valve core 121 is provided with an indicator rod 1211; the valve housing 11 is provided with a sliding hole 114 communicating with the first valve cavity 1111; the indicator rod 1211 extends through the sliding hole 114 and slides out of the valve housing 11 in a sealed manner. This allows the operator to determine whether the first valve core is in the open or closed state by the length of the indicator rod extending out of the valve housing, and the indicator rod can also guide the movement direction of the first valve core.

[0064] Preferably, the indicator rod passes through the receiving cavity, and the sliding hole communicates with the inside of the receiving cavity. More preferably, the elastic element 123 is hollow (the elastic element 123 can be a spring or elastic telescopic sleeve, etc.) and is sleeved on the outside of the indicator rod 1211, so that the elastic element 123 is more convenient to install in the receiving cavity 1114.

[0065] like Figure 1 and Figure 2 As shown, the receiving cavity 1114 is also a cylindrical cavity, and it is coaxially distributed with the first valve cavity 1111. The indicator rod is coaxially distributed in the receiving cavity 1114. The end of the indicator rod located outside the valve housing 11 is provided with an enlarged limiting part 12111. More preferably, the indicator rod 1211 is also provided with a marking ring (which can be an annular groove). When the first valve core 121 closes the channel 1113, the marking ring 12112 is flush with the end of the sliding hole 114 corresponding to the outer wall of the valve housing 11. When the first valve core 121 is in the open state, the length of the indicator rod extending outside the valve housing 11 increases, and the marking ring is exposed, making it easy for people to judge the state of the first valve core 121.

[0066] The second valve core 122 has an air passage 1222, which is used to connect the first valve chamber 1111 and the second valve chamber 1112 when the first valve core 121 moves to open the channel 1113. This allows the airflow to enter the first valve chamber 1111 when the first valve core 121 is in the open state, and then enter the second valve chamber 1112 through the air passage 1222, and finally be discharged through the exhaust port 113.

[0067] Preferably, the air passage is disposed within the lifting portion, with one end penetrating the second valve core and the other end penetrating the end of the lifting portion near the first valve core. A vent hole communicating with the air passage is provided on the side wall of the lifting portion. Alternatively, the end of the air passage near the first valve core may also penetrate the passage, but in this case, the end of the air passage near the first valve core must be serrated to ensure that the air passage is not blocked when the lifting portion abuts against the first valve core. In this embodiment, there is an annular gap between the lifting portion and the passage.

[0068] like Figure 1 and Figure 2 As shown, in order to prevent the second valve core 122 from wobbling in the second valve chamber 1112, the second valve core 122 is disc-shaped and has the same diameter as the second valve chamber 1112. At this time, the second valve core 122 and the second valve chamber 1112 are similar to the existing piston sliding in the cylinder liner (there is an annular gap between the lifting part 1221 and the channel 1113, and the opening size of the channel 1113 at one end near the first valve chamber 1111 is slightly smaller than the opening size at the other end).

[0069] In this embodiment, the ends of the first valve core 121 and the second valve core 122 near the channel 1113 are both flat surfaces. Similarly, the ends of the first valve cavity 1111 and the second valve cavity 1112 that communicate with the channel 1113 are also flat surfaces. This makes the sealing performance of the first valve core 121 better when closing the channel 1113. At the same time, when the second valve core 122 moves to push the first valve core 121 to open the channel 1113, the second valve core 122 can also fit with the second valve cavity 1112. At this time, the first valve cavity 1111 and the second valve cavity 1112 are only connected through the air passage 1222.

[0070] In some embodiments, such as Figure 3 and Figure 4As shown, the valve housing 11 includes a valve body 115, a first valve cover 1161, and a second valve cover 1162. The valve body 115 has a first chamber 1151, a second chamber 1152, and a channel 1113, and the first chamber 1151 and the second chamber 1152 are connected through the channel 1113. The first valve cover 1161 is sealed at the opening of the first chamber 1151, and together they enclose the first valve cavity 1111. The second valve cover 1162 is sealed at the opening of the second chamber 1152, and together they enclose the second valve cavity 1112. The air inlet 112 is provided on the valve body 115 or the first valve cover 1161, and the exhaust port 113 is provided on the valve body 115 or the second valve cover 1162. This makes the entire valve housing 11 easier to process and assemble. Preferably, the air inlet is provided on the valve body, and the exhaust port is provided on the second valve cover.

[0071] Specifically, such as Figure 3 and Figure 4 As shown, the first valve cover 1161 can be a circular groove, and the valve body 115 is cylindrical, with a first groove 1151 and a second groove 1152 coaxially recessed at both ends. The openings of the first groove 1151 and the second groove 1152 are opposite to each other. A channel 1113 is provided in the middle of the valve body 115 to connect the first groove 1151 and the second groove 1152. The air inlet 112 is provided on the side wall of the valve body 115. One end of the second valve cover 1162 is annular, while the middle of one end protrudes to form an exhaust port. 113, the other end of which is connected to the end of the valve body 115 near the second chamber 1152. The connection method can be a flange connection to enclose the second chamber 1152 to form a second valve cavity 1112. The groove end of the first valve cover 1161 is sealed and inserted into the first chamber 1151. At this time, the space inside the first valve cover 1161 forms a receiving cavity 1114, and the corresponding area inside the first chamber 1151 forms the first valve cavity 1111 (the sliding hole 114 is located in the middle of the groove bottom of the first valve cover 1161).

[0072] Another aspect of this utility model provides a pneumatic conveying assembly, such as... Figure 5As shown, the pneumatic conveying assembly includes a pneumatic conveying pipe 20 and an air replenishment valve 10 as described above; the pneumatic conveying pipe 20 has an air replenishment port 21 on its wall, and the exhaust port 113 is connected to the air replenishment port 21; the air inlet 112 is used to introduce compressed airflow (the compressed airflow can be compressed air, and the source of the compressed airflow can be a compressed air storage tank or an air compressor). Thus, when a blockage occurs downstream of the air replenishment valve 10 in the pneumatic conveying pipe, pressure will build up upstream of the pneumatic conveying pipe, causing the pressure to gradually increase. When F2 > F1, the valve core assembly moves to connect the air inlet and exhaust port, allowing compressed airflow to flow into the pneumatic conveying pipe and clear the blockage (at this time, the pressure corresponding to the air inlet is P1, while the pressure inside the pneumatic conveying pipe is P2).

[0073] Preferably, the air inlet 21 is inclinedly arranged in the pneumatic conveying pipe 20, and the angle between the air inlet 21 and the material inlet direction of the pneumatic conveying pipe 20 is an acute angle (preferably an angle of 30-60°, which can be any value of 30°, 35°, 40°, 45°, 50°, 55° and 60° or a range between any two values). This allows the airflow injected into the pneumatic conveying pipe through the air inlet to flow more smoothly downstream to clear the blockage.

[0074] Figure 5 The solid arrow indicates the direction of material conveying, and the dashed arrow indicates the direction of airflow introduced into the air supply valve 10.

[0075] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. An air supply valve, characterized in that, The air supply valve (10) includes: The valve housing (11) has a chamber (111), an air inlet (112) and an exhaust outlet (113), both of which are connected to the chamber (111); The valve core assembly (12) is movably disposed in the chamber (111). The pressure-bearing area of ​​the valve core assembly (12) at the end corresponding to the air inlet (112) is smaller than the pressure-bearing area of ​​the valve core assembly (12) at the end corresponding to the exhaust port (113). The valve core assembly (12) is used to move under the action of the pressure difference between the air inlet (112) and the exhaust port (113) to disconnect or open the air inlet (112) and the exhaust port (113).

2. The air supply valve according to claim 1, characterized in that, The valve core assembly (12) includes a first valve core (121) and a second valve core (122). The first valve core and the second valve core are linked together in the chamber (111). The first valve core (121) is close to the air inlet (112), and the second valve core (122) is close to the exhaust port (113). The pressure-bearing area of ​​the first valve core (121) is the pressure-bearing area of ​​the valve core assembly (12) at the end corresponding to the air inlet (112), and the pressure-bearing area of ​​the second valve core (122) is the pressure-bearing area of ​​the valve core assembly (12) at the end corresponding to the exhaust port (113).

3. The air supply valve according to claim 2, characterized in that, The chamber (111) includes a first valve chamber (1111), a second valve chamber (1112), and a channel (1113). The air inlet (112) is connected to the first valve chamber (1111), the exhaust port (113) is connected to the second valve chamber (1112), and the channel (1113) connects the first valve chamber (1111) and the second valve chamber (1112). The first valve core (121) is movably disposed in the first valve cavity (1111) and tends to move to seal the channel (1113). The second valve core (122) is movably disposed in the second valve cavity (1112). The second valve core (122) has a lifting portion (1221) extending into the channel (1113). The second valve core (122) is linked with the first valve core (121) through the lifting portion (1221).

4. The air supply valve according to claim 3, characterized in that, The valve core assembly (12) further includes an elastic element (123) disposed in the first valve cavity (1111), the elastic force of the elastic element (123) acting on the first valve core (121), which is used to squeeze the first valve core (121) to move to close the channel (1113).

5. The air supply valve according to claim 3, characterized in that, The first valve core (121) is provided with an indicator rod (1211). The valve housing (11) is provided with a sliding hole (114) that communicates with the first valve cavity (1111). The indicator rod (1211) extends through the sliding hole (114) and slides out of the valve housing (11).

6. The air supply valve according to any one of claims 3-5, characterized in that, A flexible gasket (1212) is provided on the side of the first valve core (121) near the channel (1113).

7. The air supply valve according to any one of claims 3-5, characterized in that, The second valve core (122) has an air passage (1222) for connecting the first valve chamber (1111) and the second valve chamber (1112) when the first valve core (121) moves to open the channel (1113).

8. The air supply valve according to any one of claims 3-4, characterized in that, The valve body (11) includes: The valve body (115) is provided with a first chamber (1151), a second chamber (1152) and the channel (1113), and the first chamber (1151) and the second chamber (1152) are connected through the channel (1113); The first valve cover (1161) and the sealing cover are located at the opening of the first slot (1151) and together they enclose the first valve cavity (1111). The second valve cover (1162) is a sealing cover located at the opening of the second slot (1152) to jointly enclose and form the second valve cavity (1112). The air inlet (112) is located on the valve body (115) or the first valve cover (1161), and the exhaust port (113) is located on the valve body (115) or the second valve cover (1162).

9. A pneumatic conveying assembly, characterized in that, Includes a pneumatic delivery pipe (20) and a supplementary air valve (10) as described in any one of claims 1-8; The pneumatic conveying pipe (20) has an air inlet (21) on its pipe wall, and the exhaust port (113) is connected to the air inlet (21); The air inlet (112) is used to introduce compressed airflow.

10. The pneumatic conveying assembly according to claim 9, characterized in that, The air inlet (21) is inclinedly arranged on the pneumatic conveying pipe (20), and the angle between the air inlet (21) and the material inlet direction of the pneumatic conveying pipe (20) is an acute angle.

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