A special valve for pneumatic conveying

Abstract

The present invention provides a special valve for pneumatic conveying, which relates to the technical field of special valves and solves the problems that the sealing performance between the piston and the valve body cannot be improved under the action of airflow through structural improvements; the air leakage and contact with the operator's hand cannot be avoided through structural improvements, and the avoidance structure cannot simultaneously realize the automatic locking of the adjustment screw. A special valve for pneumatic conveying includes a valve body; a connecting pipe is threadedly connected to the valve body, and a base is also threadedly connected to the valve body. A sliding rod is welded to the top surface of the piston head, and the sliding rod is a stepped shaft structure, and the sliding rod is slidably connected in the sliding groove; an elastic part B is sleeved on the sliding rod, and the elastic part B is an annular structure; the outer diameter of the elastic part B is equal to the outer diameter of the piston head, and the elastic part B constitutes an auxiliary sealing structure of the piston, so that the elastic part B can be compressed under the resistance of air pressure, thereby realizing auxiliary sealing.

Description

Technical Field

[0001] The present invention belongs to the technical field of special valves, and more specifically, particularly relates to a special valve for pneumatic conveying. Background Art

[0002] The transportation of fly ash in coal-fired power plants belongs to the category of gas-solid two-phase flow. The movement of gas and solid particles in the conveying pipe involves various conditions such as the distribution of air flow velocity and the friction between solid particles and the pipe wall. The situation is complicated and causes great wear on the components of the conveying system. The valve is a key component of the pneumatic conveying system. Therefore, the performance of the valve has a significant impact and a decisive role on the conveying efficiency of the pneumatic conveying system and whether it can operate normally. The valve problem is one of the main reasons for the problems in the existing pneumatic conveying system.

[0003] For example, the application number is CN201810504952.5, a discharge valve for a pneumatic conveying system, which involves a special valve, the inlet flange welded parts and the outlet flange welded parts are equipped with sealing gaskets and connected with bolts, nuts and flat washers. The right side plate and the left side plate are equipped with asbestos gaskets and connected with stud bolts, cap nuts and flat washers. The bearing seat is fixed to the left side plate by O-rings, stud bolts, cap nuts and flat washers. The valve adopts a flap-type sealing structure, and the entire valve is in a square box shape. Under the action of the pneumatic drive cylinder, the sealing valve plate on the rotating arm is driven to block and open the ash conveying pipeline to control the opening and closing of the valve. The valve has a simple structure, novel design, and is economical and practical. The discharge valve adopts a flap-type sealing structure, and the entire valve is in a square box shape. Under the action of the pneumatic drive cylinder, the sealing valve plate on the rotating wall is driven to block and open the ash conveying pipeline to control the opening and closing of the valve. There are fewer rotating parts, which are easy to disassemble and almost wear-free.

[0004] The pneumatic conveying valve similar to the above application currently has the following shortcomings:

[0005] First, the existing device cannot improve the sealing performance of the piston and the valve body under the action of airflow through structural improvements; second, the safety is low. When there is a leak at the adjusting screw of the valve, the leaked gas is easy to contact the operator's hands, causing burns to the operator's hands. The contact between the leak and the operator's hands cannot be avoided through structural improvements, and the avoidance structure cannot simultaneously achieve automatic locking of the adjusting screw.

[0006] Therefore, in view of this, the existing structure and defects are studied and improved, and a special valve for pneumatic conveying is provided, in order to achieve the purpose of having more practical value. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a special valve for pneumatic conveying to solve the problems that the existing device cannot improve the sealing performance of the piston and the valve body under the action of airflow through structural improvement; secondly, the safety is relatively low. When there is a leak at the adjusting screw of the valve, the leaked gas is easy to contact the operator's hand, thereby causing burns to the operator's hand, and the contact between the leaked gas and the operator's hand cannot be avoided through structural improvement, and the avoiding structure cannot simultaneously achieve the problem of automatic locking of the adjusting screw.

[0008] The purpose and effect of the pneumatic conveying valve of the present invention are achieved by the following specific technical means:

[0009] A special valve for pneumatic conveying, including a valve body; a connecting pipe is threadedly connected to the valve body, and a base is also threadedly connected to the valve body; a switch structure is installed on the valve body, and an adjustment structure is welded on the valve body; referring to the figures and the figures, the switch structure includes a sliding groove, a piston head, a sliding rod and an elastic member B, the sliding groove is opened at the bottom of the piston, and the sliding groove is a stepped groove structure; a sliding rod is welded to the top surface of the piston head, and the sliding rod is a stepped shaft structure, and the sliding rod is slidably connected in the sliding groove; an elastic member B is sleeved on the sliding rod, and the elastic member B is an annular structure; the outer diameter of the elastic member B is equal to the outer diameter of the piston head, and the elastic member B constitutes an auxiliary sealing structure of the piston.

[0010] Furthermore, the valve body comprises an air inlet pipe, an exhaust pipe and a threaded groove A. The air inlet pipe is welded to the valve body, and the exhaust pipe is also welded to the valve body, and the threaded groove A is provided on the exhaust pipe.

[0011] Furthermore, the connecting pipe includes a retaining ring, the connecting pipe head end is threadedly connected to the thread groove A, and the retaining ring is welded on the connecting pipe, and the connecting pipe head end is also sleeved with an elastic part A; when the connecting pipe head end is threadedly connected to the thread groove A, the elastic part A is in elastic contact with the exhaust pipe head end.

[0012] Furthermore, the valve body also includes a thread groove B, and the valve body is provided with a thread groove B; the base includes an adjustment hole, the head end of the base is threadedly connected in the thread groove B, and the main part of the base is a hexagonal structure; six adjustment holes are provided in a circular array on the base, and the adjustment holes are circular hole structures; the diameter of the adjustment hole is 0.5 cm, and the adjustment holes provided in the circular array together constitute an auxiliary adjustment structure of the base.

[0013] Furthermore, the base also includes a baffle, which is welded to the bottom end surface of the base and is a cylindrical plate-shaped structure; the diameter of the baffle is larger than the outer contour of the base, and the baffle constitutes a protective structure of the base adjustment part.

[0014] Furthermore, the valve body also includes an airflow tube, the top of the valve body is connected with the airflow tube, and the airflow tube constitutes a gas driving structure of the switch structure.

[0015] Furthermore, the valve body also includes an auxiliary channel, which is opened on the valve body and is also connected to the intake pipe; the auxiliary channel is opened in an inclined shape, and the head end of the auxiliary channel contacts the edge of the bottom end surface of the piston head, and the edge of the bottom end surface of the piston head is chamfered.

[0016] Furthermore, the switch structure also includes a groove, which is opened on the bottom end surface of the piston head, and the groove is an arc-shaped groove structure, and the groove of the arc-shaped groove structure constitutes an airflow guide structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Through the setting of the switch structure and the adjustment structure, first, because the sliding groove is opened at the bottom of the piston, and the sliding groove is a stepped groove structure; a sliding rod is welded on the top surface of the piston head, and the sliding rod is a stepped shaft structure, and the sliding rod is slidably connected in the sliding groove; an elastic part B is sleeved on the sliding rod, and the elastic part B is a ring structure; the outer diameter of the elastic part B is equal to the outer diameter of the piston head, and the elastic part B constitutes an auxiliary sealing structure of the piston, so that the elastic part B can be compressed under the resistance of air pressure, thereby realizing auxiliary sealing; second, because the groove is opened on the bottom end surface of the piston head, and the groove is an arc-shaped groove structure, and the groove of the arc-shaped groove structure constitutes an airflow guide structure, so that the airflow can be redirected through the groove, and then the two airflows after collision can reduce the impact force and friction on the connection between the exhaust pipe and the valve body.

[0019] By setting the base, first, because the head end of the base is threadedly connected in the thread groove B, and the main part of the base is a hexagonal structure; six adjustment holes are opened on the base in a circular array, and the adjustment holes are circular hole structures; the diameter of the adjustment hole is 0.5cm, and the adjustment holes opened in the circular array together constitute the auxiliary adjustment structure of the base, so that a cylindrical rod with a diameter of 0.5cm can be inserted into the adjustment hole to achieve the adjustment of the base; second, because the baffle is welded to the bottom end face of the base, and the baffle is a cylindrical plate structure; the diameter of the baffle is larger than the outer contour of the base, and the baffle constitutes the protective structure of the adjustment part of the base.

[0020] Through the setting of the auxiliary channel, since an auxiliary channel is opened on the valve body, and the auxiliary channel is also connected with the air inlet pipe; the auxiliary channel is opened in an inclined shape, and the head end of the auxiliary channel contacts with the edge of the bottom end face of the piston head, and the edge of the bottom end face of the piston head is chamfered, so that when the pressure of the air flow pipe disappears, the air flow of the intake pipe can realize the rise of the piston head through the auxiliary channel, thereby realizing the unlocking of the piston head, and vortex can be generated under the action of the auxiliary channel, and deposition will not occur or is not easy to occur in the valve cavity, thereby solving the accumulation problem of fly ash inside the valve cavity of the gate valve during transportation and ensuring the working reliability of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional structural schematic diagram of the present invention.

[0022] Figure 2 The present invention Figure 1 A is an enlarged structural diagram of FIG.

[0023] Figure 3 The present invention Figure 1 Schematic diagram of the enlarged structure at B.

[0024] Figure 4 It is a schematic diagram of the structure of the present invention in cross-section.

[0025] Figure 5 The present invention Figure 4 Enlarged structural diagram at C.

[0026] Figure 6 The present invention Figure 4 Enlarged structural diagram at D.

[0027] Figure 7 The present invention Figure 4 Enlarged structural diagram at E.

[0028] Figure 8 The present invention Figure 4 Enlarged structural diagram of F.

[0029] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0030] 1. Valve body; 101. Inlet pipe; 102. Exhaust pipe; 103. Thread groove A; 104. Thread groove B; 105. Auxiliary channel; 106. Air flow pipe; 2. Connecting pipe; 201. Retaining ring; 202. Elastic part A; 3. Base; 301. Adjustment hole; 302. Baffle; 4. Switch structure; 401. Piston; 402. Sliding groove; 403. Piston head; 404. Sliding rod; 405. Elastic part B; 406. Groove. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example:

[0035] As attached Figure 1 To Attachment Figure 8 As shown:

[0036] The present invention provides a valve for pneumatic conveying, comprising a valve body 1; a connecting pipe 2 is threadedly connected to the valve body 1, and a base 3 is also threadedly connected to the valve body 1; a switch structure 4 is installed on the valve body 1, and an adjustment structure is welded on the valve body 1; Figure 4 and Figure 8 The switch structure 4 includes a sliding groove 402, a piston head 403, a sliding rod 404 and an elastic member B405. The sliding groove 402 is opened at the bottom of the piston 401, and the sliding groove 402 is a stepped groove structure; a sliding rod 404 is welded on the top surface of the piston head 403, and the sliding rod 404 is a stepped shaft structure, and the sliding rod 404 is slidably connected in the sliding groove 402; an elastic member B405 is sleeved on the sliding rod 404, and the elastic member B405 is a ring structure; the outer diameter of the elastic member B405 is equal to the outer diameter of the piston head 403, and the elastic member B405 constitutes an auxiliary sealing structure of the piston 401, so that the elastic member B405 can be compressed under the resistance of air pressure, thereby realizing auxiliary sealing.

[0037] References Figure 4The valve body 1 includes an intake pipe 101, an exhaust pipe 102 and a threaded groove A103. The intake pipe 101 is welded to the valve body 1, and the exhaust pipe 102 is also welded to the valve body 1, and the exhaust pipe 102 is provided with a threaded groove A103.

[0038] References Figure 1 The connecting pipe 2 includes a retaining ring 201, the head end of the connecting pipe 2 is threadedly connected to the thread groove A103, and the retaining ring 201 is welded on the connecting pipe 2, and the head end of the connecting pipe 2 is also sleeved with an elastic member A202; when the head end of the connecting pipe 2 is threadedly connected to the thread groove A103, the elastic member A202 elastically contacts the head end of the exhaust pipe 102, thereby improving the sealing performance of the connection between the exhaust pipe 102 and the connecting pipe 2.

[0039] References Figure 1 and Figure 3 The valve body 1 also includes a thread groove B104, and the valve body 1 is provided with a thread groove B104; the base 3 includes an adjustment hole 301, and the head end of the base 3 is threadedly connected in the thread groove B104, and the main part of the base 3 is a hexagonal structure; six adjustment holes 301 are provided in a circular array on the base 3, and the adjustment holes 301 are a circular hole structure; the diameter of the adjustment hole 301 is 0.5 cm, and the adjustment holes 301 provided in the circular array together constitute an auxiliary adjustment structure of the base 3, so that a cylindrical rod with a diameter of 0.5 cm can be inserted into the adjustment hole 301 to achieve adjustment of the base 3.

[0040] References Figure 1 The base 3 also includes a baffle 302, which is welded to the bottom end surface of the base 3 and is a cylindrical plate-shaped structure; the diameter of the baffle 302 is larger than the outer contour of the base 3, and the baffle 302 constitutes a protective structure of the adjustment part of the base 3.

[0041] References Figure 4 The valve body 1 also includes an airflow tube 106 , the top of the valve body 1 is connected with the airflow tube 106 , and the airflow tube 106 constitutes a gas driving structure of the switch structure 4 .

[0042] References Figure 4The valve body 1 also includes an auxiliary channel 105. The valve body 1 is provided with the auxiliary channel 105, and the auxiliary channel 105 is also connected to the air inlet pipe 101; the auxiliary channel 105 is opened in an inclined shape, and the head end of the auxiliary channel 105 contacts the edge of the bottom end surface of the piston head 403, and the edge of the bottom end surface of the piston head 403 is chamfered, so that when the pressure of the air flow pipe 106 disappears, the air flow of the air inlet pipe 101 can realize the rise of the piston head 403 through the auxiliary channel 105, thereby realizing the unlocking of the piston head 403, and vortex can be generated under the action of the auxiliary channel 105, so that there will be no or less deposition in the valve cavity, thereby solving the accumulation problem of fly ash in the valve cavity of the gate valve during transportation and ensuring the working reliability of the gate valve.

[0043] References Figure 4 The switch structure 4 also includes a groove 406, which is provided on the bottom end surface of the piston head 403, and the groove 406 is an arc-shaped groove structure, and the groove 406 of the arc-shaped groove structure constitutes an airflow guide structure, so that the airflow can be redirected through the groove 406, and then the two airflows after the collision can reduce the impact force and friction force on the connection between the exhaust pipe 102 and the valve body 1.

[0044] The specific usage and function of this embodiment are as follows:

[0045] When disassembling and assembling the base 3, firstly, because the head end of the base 3 is threadedly connected in the thread groove B104, and the main part of the base 3 is a hexagonal structure; six adjustment holes 301 are provided on the base 3 in a circular array, and the adjustment holes 301 are circular hole structures; the diameter of the adjustment holes 301 is 0.5 cm, and the adjustment holes 301 provided in the circular array together constitute the auxiliary adjustment structure of the base 3, so that a cylindrical rod with a diameter of 0.5 cm can be inserted into the adjustment hole 301 to adjust the base 3; secondly, because the baffle 302 is welded to the bottom end surface of the base 3, and the baffle 302 is a cylindrical plate structure; the diameter of the baffle 302 is larger than the outer contour of the base 3, and the baffle 302 constitutes a protective structure of the adjustment part of the base 3;

[0046] When adjusting the switch structure 4, firstly, because the valve body 1 also includes an airflow tube 106, the top of the valve body 1 is connected with the airflow tube 106, and the airflow tube 106 constitutes the gas drive structure of the switch structure 4; secondly, because the valve body 1 is provided with an auxiliary channel 105, and the auxiliary channel 105 is also connected with the intake pipe 101; the auxiliary channel 105 is opened in an inclined shape, and the head end of the auxiliary channel 105 contacts the edge of the bottom end surface of the piston head 403, and the edge of the bottom end surface of the piston head 403 is chamfered, so that when the pressure of the airflow tube 106 disappears, the airflow of the intake pipe 101 can realize the rise of the piston head 403 through the auxiliary channel 105, thereby realizing the unlocking of the piston head 403, and a vortex can be generated under the action of the auxiliary channel 105, There will be no or less deposition in the valve cavity, thereby solving the problem of accumulation of fly ash in the gate valve cavity during transportation and ensuring the working reliability of the gate valve; thirdly, because the sliding groove 402 is provided at the bottom of the piston 401, and the sliding groove 402 is a stepped groove structure; a sliding rod 404 is welded on the top surface of the piston head 403, and the sliding rod 404 is a stepped shaft structure, and the sliding rod 404 is slidably connected in the sliding groove 402; an elastic member B405 is sleeved on the sliding rod 404, and the elastic member B405 is an annular structure; the outer diameter of the elastic member B405 is equal to the outer diameter of the piston head 403, and the elastic member B405 constitutes an auxiliary sealing structure of the piston 401, so that the elastic member B405 can be compressed under the resistance of air pressure, thereby realizing auxiliary sealing;

[0047] During use, since the groove 406 is provided on the bottom end surface of the piston head 403 and the groove 406 is an arc-shaped groove structure, and the groove 406 of the arc-shaped groove structure constitutes an airflow guide structure, the airflow can be redirected through the groove 406, and the two airflows after collision can reduce the impact force and friction force on the connection between the exhaust pipe 102 and the valve body 1.

[0048] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A valve for pneumatic conveying, characterized in that: The invention comprises a valve body (1); a connecting pipe (2) is threadedly connected to the valve body (1), and a base (3) is also threadedly connected to the valve body (1); a switch structure (4) is installed on the valve body (1), and an adjustment structure is welded to the valve body (1); the switch structure (4) comprises a sliding groove (402), a piston head (403), a sliding rod (404) and an elastic member B (405); the sliding groove (402) is provided at the bottom of the piston (401), and the sliding groove (402) is a stepped groove structure; the sliding rod (404) is welded to the top surface of the piston head (403), and the sliding rod (404) is a stepped shaft structure; The sliding rod (404) is slidably connected in the sliding groove (402); an elastic member B (405) is sleeved on the sliding rod (404), and the elastic member B (405) is an annular structure; the outer diameter of the elastic member B (405) is equal to the outer diameter of the piston head (403), and the elastic member B (405) constitutes an auxiliary sealing structure of the piston (401); the valve body (1) comprises an intake pipe (101), an exhaust pipe (102) and a threaded groove A (103); the intake pipe (101) is welded to the valve body (1), and the exhaust pipe (102) is also welded to the valve body (1), and the exhaust pipe (102) is provided with a threaded groove A (103); The valve body (1) further comprises an air flow tube (106), the top of the valve body (1) being connected to the air flow tube (106), and the air flow tube (106) constitutes a gas drive structure of the switch structure (4); The valve body (1) further comprises an auxiliary channel (105), the valve body (1) is provided with an auxiliary channel (105), and the auxiliary channel (105) is also connected to the air intake pipe (101); the auxiliary channel (105) is provided in an inclined shape, and the head end of the auxiliary channel (105) contacts the edge of the bottom end surface of the piston head (403), and the edge of the bottom end surface of the piston head (403) is chamfered; When the pressure in the air flow pipe (106) disappears, the air flow in the air intake pipe (101) passes through the auxiliary channel (105) to achieve the rise of the piston head (403), thereby achieving the unlocking of the piston head (403), and generating a vortex through the action of the auxiliary channel (105).

2. A valve for pneumatic conveying as claimed in claim 1, characterized in that: The connecting pipe (2) comprises a retaining ring (201), the head end of the connecting pipe (2) is threadedly connected to the thread groove A (103), the retaining ring (201) is welded to the connecting pipe (2), and the head end of the connecting pipe (2) is also sleeved with an elastic member A (202); when the head end of the connecting pipe (2) is threadedly connected to the thread groove A (103), the elastic member A (202) is in elastic contact with the head end of the exhaust pipe (102).

3. A valve for pneumatic conveying as claimed in claim 1, characterized in that: The valve body (1) further comprises a thread groove B (104), and the valve body (1) is provided with a thread groove B (104); the base (3) comprises an adjustment hole (301), and the head end of the base (3) is threadedly connected in the thread groove B (104), and the main body of the base (3) is a hexagonal structure; six adjustment holes (301) are provided in a circular array on the base (3), and the adjustment holes (301) are circular hole structures; the diameter of the adjustment holes (301) is 0.5 cm, and the adjustment holes (301) provided in the circular array together constitute an auxiliary adjustment structure of the base (3).

4. A valve for pneumatic conveying as claimed in claim 1, characterized in that: The base (3) further comprises a baffle (302), the baffle (302) being welded to the bottom end surface of the base (3), and the baffle (302) being a cylindrical plate-shaped structure; the diameter of the baffle (302) is larger than the outer contour of the base (3), and the baffle (302) constitutes a protective structure of the adjustment part of the base (3).

5. A valve for pneumatic conveying as claimed in claim 1, characterized in that: The switch structure (4) further comprises a groove (406), wherein the groove (406) is provided on the bottom end surface of the piston head (403), and the groove (406) is an arc-shaped groove structure, and the groove (406) of the arc-shaped groove structure constitutes an airflow guide structure.

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