A pulse valve

Abstract

The utility model discloses a pulse valve is installed at the top of gas pocket, and it includes pulse valve main part, pulse valve main part is divided into lower main valve body and upper pilot valve body, still install first sealing member between main valve body and gas pocket, the central position of main valve body bottom is provided with gas outlet, the bottom of main valve body bottom still is provided with with the air inlet that communicates with gas outlet, the bottom of gas outlet is inserted with exhaust pipe, and the second sealing member is installed between gas outlet and exhaust pipe, the second sealing member includes the sealing sleeve of setting in the exhaust pipe outside and a plurality of third protruding that sets in sealing sleeve inner wall. The utility model discloses through setting up the second sealing member between gas outlet and exhaust pipe, is used for increasing the leakproofness, solves the problem of the insufficient leakproofness of present.

Description

Technical Field

[0001] This utility model relates to the technical field of bag filter accessories, specifically a pulse valve. Background Technology

[0002] The submerged pulse valve is the core cleaning actuator of a pulse jet bag filter. Its core principle is: by controlling the on / off state of the electromagnetic pilot valve, the pressure balance of the air chamber inside the valve body is changed, driving the diaphragm of the main valve to open and close rapidly, thereby spraying compressed air into the filter bag in a pulse form to achieve filter bag cleaning. Because the main valve body is "submerged" in the compressed air tank (the air inlet is directly connected to the air tank), it is called "submerged".

[0003] In existing technologies, the connection between the outlet of a submerged pulse valve and the jet pipe generally adopts a "direct insertion" structure: one end of the jet pipe is directly inserted into the outlet of the pulse valve, and sealing is achieved only by setting an annular sealing ring between the outer wall of the pipe and the inner wall of the outlet. Although this connection method has the advantages of simple structure and convenient assembly, it has revealed significant sealing defects in practical applications, becoming one of the main problems affecting the working performance of the pulse valve. Specifically, the above-mentioned sealing structure has the following technical shortcomings: the sealing contact area of ​​a single sealing ring is limited, and it is affected by the deviation of the pipe insertion depth, the processing accuracy of the pipe outer wall, and the coaxiality during installation. The sealing ring is prone to uneven compression, local deformation, or displacement, resulting in poor sealing surface fit and the formation of gas leakage channels. Utility Model Content

[0004] The purpose of this utility model is to provide a pulse valve that increases sealing performance by providing a second sealing element between the air outlet and the exhaust pipe, thereby solving the problem of insufficient sealing performance in existing valves.

[0005] To address the problems of existing technologies, this utility model provides a pulse valve, installed on the top of an air tank, comprising a pulse valve body, which is divided into a lower main valve body and an upper pilot valve body. A first sealing element is installed between the main valve body and the air tank. An air outlet is provided at the center of the bottom of the main valve body, and an air inlet communicating with the air outlet is also provided at the bottom of the main valve body. An exhaust pipe is inserted into the bottom of the air outlet, and a second sealing element is installed between the air outlet and the exhaust pipe. The second sealing element includes a sealing sleeve fitted outside the exhaust pipe and several third protrusions provided on the inner wall of the sealing sleeve.

[0006] Preferably, there is a gap between adjacent third protrusions, and the third protrusions can contact the outer wall of the exhaust pipe.

[0007] Preferably, the outer wall of the sealing sleeve is provided with a plurality of second protrusions, and the inner wall of the air outlet is provided with a plurality of first annular grooves, wherein the second protrusions can be inserted into the first annular grooves.

[0008] Preferably, the second seal is made of rubber.

[0009] Preferably, the first sealing element includes a sealing ring disposed on the top of the pulse valve body and a first protrusion disposed on the top of the sealing ring, and a second annular groove capable of accommodating the first protrusion is also provided at the bottom of the main valve body.

[0010] Preferably, the first sealing element further includes an extension disposed at the bottom of the sealing ring, and a limiting ring is disposed at the bottom of the extension, and the sealing ring and the limiting ring are clamped together at the opening of the air bag.

[0011] Preferably, the main valve body is further provided with a main diaphragm body, and the main diaphragm body is provided with a main diaphragm throttling orifice. The main diaphragm body is located at the junction of the air inlet and the air outlet. A first return spring is connected to the top of the main diaphragm body, and the first return spring is connected to the top of the main valve body.

[0012] Preferably, the pilot valve body has a pilot exhaust port near the main valve body, and the pilot valve body also has a channel inside that connects the pilot exhaust port to the main valve body. A secondary diaphragm body is also provided at the junction of the pilot exhaust port and the channel, and the secondary diaphragm body has a secondary throttling orifice. A housing is provided on the top of the pilot valve body, and a coil is installed in the housing. The coil also has a moving and stationary iron core assembly inside, which is connected to the secondary diaphragm body. A second return spring is also provided inside the pilot valve body to reset the secondary diaphragm body. A junction box is also provided outside the housing.

[0013] The advantages of this utility model compared to the prior art are: This application addresses the sealing defects in the connection between the outlet and exhaust pipe of existing submerged pulse valves by incorporating a second sealing element inside the outlet. The core structure of this second sealing element is a sealing sleeve, which achieves multiple seals between the outlet and the exhaust pipe. Specifically, the outer peripheral wall of the sealing sleeve has several second protrusions integrally formed and spaced axially. Correspondingly, the inner wall of the outlet has a first annular groove that mates with the second protrusions. During assembly, the second protrusions can be embedded into the first annular groove, forming a radial sealing structure between the sealing sleeve and the outlet. Simultaneously, the second protrusions can fully fill the tiny gaps between the inner wall of the first annular groove and the outer peripheral wall of the sealing sleeve, eliminating gas leakage channels at this contact interface. Furthermore, the inner peripheral wall of the sealing sleeve has several third protrusions evenly distributed circumferentially, with gaps forming between adjacent third protrusions. When the exhaust pipe is inserted axially into the inner hole of the sealing sleeve, the outer wall of the exhaust pipe exerts a radial extrusion force on the inner circumferential wall of the sealing sleeve, causing the third protrusion to undergo elastic deformation and fit tightly against the outer wall of the exhaust pipe, forming a sealing structure between the sealing sleeve and the exhaust pipe. Furthermore, the elastic deformation of the third protrusion can adapt to the machining error of the outer wall of the exhaust pipe and the coaxiality deviation during insertion, further filling the gap between the sealing sleeve and the exhaust pipe, significantly improving the overall sealing performance of the connection between the air outlet and the exhaust pipe, and effectively suppressing the leakage problem of high-pressure compressed air during the injection process. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of a pulse valve during installation according to this utility model.

[0015] Figure 2 This is an exploded structural diagram of the pulse valve of this utility model during installation.

[0016] Figure 3 This is a cross-sectional structural diagram of a pulse valve according to the present invention.

[0017] Figure 4 This is a three-dimensional structural diagram of the sealing ring of a pulse valve according to the present invention.

[0018] Figure 5 This is a schematic diagram of the second three-dimensional structure of the sealing ring of a pulse valve according to this utility model.

[0019] Figure 6 This is a three-dimensional structural diagram of the second sealing element of a pulse valve according to the present invention.

[0020] The following are the labels in the diagram: 1. Pulse valve body; 11. Main valve body; 111. Air inlet; 112. Air outlet; 1121. First annular groove; 113. Main diaphragm body; 1131. Main diaphragm throttling orifice; 114. First return spring; 115. Second annular groove; 12. Pilot valve body; 121. Pilot exhaust port; 122. Secondary diaphragm body; 1221. Secondary diaphragm throttling orifice; 123. Second return spring; 124. Housing; 1241. Coil; 1242. Moving and stationary iron core assembly; 1243. Junction box; 2. Air tank; 3. Exhaust pipe; 4. First seal; 41. Sealing ring; 42. Extension; 43. Limiting ring; 44. First protrusion; 5. Second seal; 51. Sealing sleeve; 52. Second protrusion; 53. Third protrusion. Detailed Implementation

[0021] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-6As shown, this utility model provides a pulse valve, installed on top of an air reservoir 2, including a pulse valve body 1. The air reservoir 2 serves as a storage container for high-pressure compressed air, providing a stable air source for the pulse valve. The top of the air reservoir 2 is used to install the pulse valve body 1. The air reservoir 2 can store compressed air at a pressure of 0.3-0.6 MPa. When the pulse valve opens for blowing, it can quickly release sufficient airflow to ensure that the blowing pressure and flow rate meet the filter bag cleaning requirements. The pulse valve body 1 is divided into a lower main valve body 11 and an upper pilot valve body 12. The pulse valve body 1 is the core component for realizing airflow cut-off control. The main valve body 11 and the pilot valve body 12 work together to complete the pulse blowing action. The main valve body 11 undertakes the key functions of airflow delivery and sealing, while the pilot valve body 12 drives the main valve body 11 to operate by controlling air pressure changes. Together, they form a "pilot control - main valve execution" control structure, which is the core carrier for the pulse valve to achieve rapid opening and closing. The pilot valve body 12 is the control and drive component of the pulse valve, and internally contains an electromagnetic control component and an airflow control channel. Its core function is to receive electrical signals (such as DC24V) from an external pulse controller, change the internal air circuit state by switching the electromagnetic components on and off, and thus control the pressure change in the upper air chamber (control chamber) inside the main valve body 11. This creates a pressure difference that drives the diaphragm inside the main valve body 11 to move, ultimately realizing the opening and closing of the main valve body 11. This is the key link in the "electro-pneumatic conversion" of the pulse valve. A first sealing element 4 is also installed between the main valve body 11 and the air tank 2. The first sealing element 4 can fill the tiny gap between the bottom of the main valve body 11 and the top mounting surface of the air tank 2, preventing the high-pressure compressed air in the air tank 2 from leaking from the mounting gap. This ensures that compressed air enters the main valve body 11 only through the air inlet 111, ensuring the efficiency of air source utilization and avoiding pressure loss and increased energy consumption due to leakage. An air outlet 112 is located at the center of the bottom of the main valve body 11. An air inlet 111, communicating with the air outlet 112, is also located at the bottom of the main valve body 11. An exhaust pipe 3 is inserted into the bottom of the air outlet 112, and a second sealing element 5 is installed between the air outlet 112 and the exhaust pipe 3. The exhaust pipe 3 is a high-pressure pulse airflow delivery pipe. One end is inserted into the air outlet 112 and sealed by the second sealing element 5, while the other end is connected to the dust collector's blowpipe or directly to the filter bag. It can deliver the high-pressure pulse airflow released by the main valve body 11 to the inside of the filter bag, impacting the dust layer on the filter bag surface to achieve filter bag cleaning. It serves as an airflow delivery bridge between the pulse valve and the dust collector filter bag. The second sealing element 5 includes a sealing sleeve 51 fitted over the exhaust pipe 3 and several third protrusions 53 disposed on the inner wall of the sealing sleeve 51.

[0023] There is a gap between adjacent third protrusions 53, and the third protrusions 53 can contact the outer wall of the exhaust pipe 3. The outer wall of the sealing sleeve 51 is provided with a plurality of second protrusions 52, and the inner wall of the air outlet 112 is provided with a plurality of first annular grooves 1121, into which the second protrusions 52 can be inserted. When the exhaust pipe 3 is inserted into the sealing sleeve 51 axially, the outer wall of the exhaust pipe 3 will exert a radial compressive force on the third protrusions 53, causing the third protrusions 53 to undergo elastic deformation and fit tightly against the outer wall of the exhaust pipe 3, forming an axial sealing structure between the sealing sleeve 51 and the exhaust pipe 3.

[0024] The second seal 5 is made of rubber. The second seal 5 is made of rubber, which provides a reliable seal for the connection between the air outlet 112 and the exhaust pipe 3 by utilizing the excellent elasticity, sealing performance and resistance to compression fatigue of rubber.

[0025] The first sealing element 4 includes a sealing ring 41 disposed on the top of the pulse valve body 1 and a first protrusion 44 disposed on the top of the sealing ring 41. The bottom of the main valve body 11 is also provided with a second annular groove 115 capable of accommodating the first protrusion 44. The first sealing element 4 also includes an extension 42 disposed on the bottom of the sealing ring 41, and a limiting ring 43 is provided at the bottom of the extension 42. The sealing ring 41 and the limiting ring 43 are together clamped at the opening of the air bag 2. The first protrusion 44 can be embedded in the second annular groove 115. On the one hand, it achieves axial positioning of the first seal 4 and the main valve body 11, preventing the first seal 4 from shifting during assembly or operation. On the other hand, the first protrusion 44 can fill the tiny gap between the inner wall of the second annular groove 115 and the top of the sealing ring 41, forming a radial sealing barrier between the main valve body 11 and the first seal 4, blocking compressed air from leaking from the gap between them. The extension 42 at the bottom of the sealing ring 41 can be inserted into the air tank 2 along the inner wall of the mounting opening at the top of the air tank 2. The limiting ring 43 at the bottom of the extension 42 fits against the inner wall surface of the air tank 2. At this time, the bottom surface of the sealing ring 41 is in close contact with the top mounting surface of the air tank 2, and the limiting ring 43 is in close contact with the inner wall surface of the air tank 2. The sealing ring 41 and the limiting ring 43 are clamped together at the opening of the air tank 2, forming a "radial + axial" double sealing structure. This effectively prevents high-pressure compressed air in the air tank 2 from leaking from the connection gap between the main valve body 11 and the air tank 2.

[0026] The main valve body 11 is also provided with a main diaphragm body 113 inside. The main diaphragm body 113 is also provided with a main diaphragm throttling orifice 1131. The main diaphragm body 113 is located at the junction of the air inlet 111 and the air outlet 112. The top of the main diaphragm body 113 is connected to a first return spring 114, and the first return spring 114 is connected to the top of the inside of the main valve body 11. The pilot valve body 12 is provided with a pilot exhaust port 121 near the main valve body 11. The pilot valve body 12 also has a channel inside that connects the pilot exhaust port 121 to the main valve body 11. A secondary diaphragm body 122 is provided at the junction of the pilot exhaust port 121 and the channel. The secondary diaphragm body 122 has a secondary diaphragm throttling orifice 1221. A housing 124 is provided on the top of the pilot valve body 12. A coil 1241 is installed in the housing 124. A moving and stationary iron core assembly 1242 is provided inside the coil 1241. The moving and stationary iron core assembly 1242 is connected to the secondary diaphragm body 122. A second return spring 123 is provided inside the pilot valve body 12 to reset the secondary diaphragm body 122. A junction box 1243 is provided outside the housing 124.

[0027] In the initial state, coil 1241 is de-energized, and no electromagnetic force acts on the moving and stationary iron core assembly 1242. The second return spring 123 pushes the secondary diaphragm body 122 to tightly seal the pilot exhaust port 121, blocking the communication between the air chamber above the main diaphragm body 113 in the main valve body 11 and the atmosphere. At this time, the high-pressure compressed air in the air tank 2 enters the air chamber below the main diaphragm body 113 in the main valve body 11 through the air inlet 111. At the same time, some compressed air slowly flows into the air chamber above the main diaphragm body 113 through the main diaphragm throttling orifice 1131 on the main diaphragm body 113. Finally, the pressure in the upper and lower air chambers of the main diaphragm body 113 is balanced. Under the combined action of the elastic force of the first return spring 114 and the pressure in the upper air chamber, the main diaphragm body 113 is tightly pressed against the junction of the air inlet 111 and the air outlet 112, blocking the airflow from the air inlet 111 to the air outlet 112. There is no airflow output from the exhaust pipe 3, and the pulse valve is in the closed state. When filter bag cleaning is required, the external pulse controller sends an electrical signal to coil 1241. Coil 1241 is energized, generating electromagnetic force that attracts the moving and stationary iron core assembly 1242 upwards. This causes the secondary diaphragm body 122 to overcome the elastic force of the second return spring 123 and lift upwards, opening the pilot exhaust port 121. Compressed air in the upper chamber of the main diaphragm body 113 is rapidly discharged into the atmosphere through the internal channel of the pilot valve body 12 and the pilot exhaust port 121, instantly reducing the pressure to atmospheric pressure. Meanwhile, the lower chamber of the main diaphragm body 113 remains connected to the air tank 2, maintaining a high-pressure state, creating a significant pressure difference between the upper and lower sides of the main diaphragm body 113. The thrust generated by this pressure difference overcomes the elastic force of the first return spring 114, pushing the main diaphragm body 113 upwards rapidly, opening the channel between the inlet 111 and the outlet 112. High-pressure compressed air in air tank 2 enters air outlet 112 through air inlet 111 and air chamber below main diaphragm body 113. The compressed air is sprayed along exhaust pipe 3 in the form of high-speed pulses onto filter bag, impacting the dust layer on the surface of filter bag to achieve dust removal.

[0028] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A pulse valve, installed on the top of an air tank (2), characterized in that, The device includes a pulse valve body (1), which is divided into a lower main valve body (11) and an upper pilot valve body (12). A first sealing element (4) is installed between the main valve body (11) and the air tank (2). An air outlet (112) is provided at the center of the bottom of the main valve body (11). An air inlet (111) communicating with the air outlet (112) is also provided at the bottom of the main valve body (11). An exhaust pipe (3) is inserted into the bottom of the air outlet (112). A second sealing element (5) is installed between the air outlet (112) and the exhaust pipe (3). The second sealing element (5) includes a sealing sleeve (51) sleeved on the outside of the exhaust pipe (3) and several third protrusions (53) provided on the inner wall of the sealing sleeve (51).

2. A pulse valve according to claim 1, characterized in that: There is a gap between adjacent third protrusions (53), and the third protrusions (53) can contact the outer wall of the exhaust pipe (3).

3. A pulse valve according to claim 1, characterized in that: The outer wall of the sealing sleeve (51) is provided with a number of second protrusions (52), and the inner wall of the air outlet (112) is provided with a number of first annular grooves (1121). The second protrusions (52) can be inserted into the first annular grooves (1121).

4. A pulse valve according to claim 1, characterized in that: The second seal (5) is made of rubber.

5. A pulse valve according to claim 1, characterized in that: The first sealing element (4) includes a sealing ring (41) disposed on the top of the pulse valve body (1) and a first protrusion (44) disposed on the top of the sealing ring (41). The bottom of the main valve body (11) is also provided with a second annular groove (115) that can accommodate the first protrusion (44).

6. A pulse valve according to claim 5, characterized in that: The first sealing element (4) further includes an extension (42) disposed at the bottom of the sealing ring (41), and a limiting ring (43) is disposed at the bottom of the extension (42), and the sealing ring (41) and the limiting ring (43) are clamped together at the opening of the air bag (2).

7. A pulse valve according to claim 1, characterized in that: The main valve body (11) is also provided with a main diaphragm body (113), and a main diaphragm throttling hole (1131) is also provided on the main diaphragm body (113). The main diaphragm body (113) is located at the junction of the air inlet (111) and the air outlet (112). A first return spring (114) is connected to the top of the main diaphragm body (113), and the first return spring (114) is connected to the top of the main valve body (11).

8. A pulse valve according to claim 1, characterized in that: The pilot valve body (12) is provided with a pilot exhaust port (121) near the main valve body (11). The pilot valve body (12) also has a channel connecting the pilot exhaust port (121) and the main valve body (11). A secondary diaphragm body (122) is provided at the junction of the pilot exhaust port (121) and the channel, and a secondary diaphragm throttling orifice (1221) is provided on the secondary diaphragm body (122). The top of the pilot valve body (12) is provided with… The valve body (12) is provided with a housing (124), a coil (1241) is installed in the housing (124), and a moving and stationary iron core assembly (1242) is also provided inside the coil (1241). The moving and stationary iron core assembly (1242) is connected to the secondary diaphragm body (122). A second reset spring (123) is also provided inside the pilot valve body (12) to reset the secondary diaphragm body (122). A junction box (1243) is also provided outside the housing (124).

Images