External transmission ceramic double-core adjustable shrinkage cavity

Abstract

The utility model relates to the technical field of adjustable shrinkage cavities, and discloses an external transmission ceramic double-core adjustable shrinkage cavity, which is characterized in that observation holes are respectively arranged on a left shell and a right shell of a shell, flow guide pipes are arranged in an outlet pipeline of the shell and an internal space of the shell, a lower shell is arranged at the lower end of the shell, and the lower shell is in an inverted cone shape; a first valve plate and a second valve plate are arranged on the transmission mechanism, the first valve plate and the second valve plate are composite ceramic valve plates composed of metal plates and wear-resistant ceramic plates, a powder cleaning device is arranged at the bottom ends of the valve plates, and accumulated powder on a screw rod is extruded through a threading die in a transmission nut with a transmission rod and removed. The problems of clamping stagnation and insensitive adjustment caused by powder accumulation of the screw rod are solved, and the gap between the valve plate and the outlet pipeline can be adjusted through the upper and lower adjusting gaskets on the rotating shaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of adjustable orifices, and particularly relates to an externally-driven ceramic double-core adjustable orifice. Background Art

[0002] The adjustable orifice is used in the horizontal pulverized coal conveying pipeline at the outlet of the coal mill to control the pulverized coal flow rate of the coal mill. It is developed by adopting advanced foreign technologies. The bottom of the orifice is a complete circular pipeline, which can avoid the defects that the core plate cannot be adjusted or coal powder explosion is caused due to the accumulation of coal powder at the bottom of the orifice. It drives the valve plate to move up and down through the rotational torque on the handwheel and the up and down transmission of the transmission rod, so as to achieve the purpose of adjusting the flow cross-sectional area of the pipeline.

[0003] After retrieval, the document with the publication number (CN218408588U) discloses a screw rod external type wear-resistant double-core adjustable orifice, which includes a driving component, a screw rod transmission component and a rectangular metal bin. Circular holes are symmetrically opened on both sides of the rectangular metal bin. A strip-shaped bin is installed on the top of the rectangular metal bin, and a rotating shaft passing through it is arranged inside the strip-shaped bin. A screw rod transmission component is arranged on the outer side of the rotating shaft. A transmission bin is installed at one end of the strip-shaped bin, and the driving component is arranged in the transmission bin. Two groups of first strip-shaped grooves are opened on the strip-shaped bin, and a transverse moving rod is connected and installed on the screw rod rotating component.

[0004] The above device is equipped with a driving component, a screw rod transmission component, a transverse moving rod, a transmission part and a main core body, which realizes the automatic control of the opening and closing degree of the main core body, has high adjustment accuracy, and when the stepping motor fails or has problems with its functions, it can be adjusted manually to adjust the flow rate in case of emergency.

[0005] Most of the adjustable orifices used in the current market directly adopt steel valve plates. After long-term use, the valve plates are worn due to frequent opening and closing, resulting in gaps between the valve plates and the adjustable orifices, and having the disadvantages of not being wear-resistant and short service life.

[0006] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0007] In order to solve the technical problem of the non-wear-resistant valve plate, the basic concept of the technical solution adopted by the present utility model is:

[0008] An externally-driven ceramic double-core adjustable orifice, comprising:

[0009] A housing, an outlet pipe is arranged at the upper end of the housing, and an inverted conical lower housing is arranged at the lower end of the housing;

[0010] The transmission mechanism is arranged on the housing. The transmission mechanism is used to drive the internal components of the housing to rotate. The transmission mechanism is provided with a transmission screw, a transmission nut with a belt transmission rod, upper and lower adjusting gaskets, a support arm, a bearing, a gasket, a locking screw, a shaft sleeve, a housing bearing seat, a first valve plate, and a second valve plate. The first valve plate and the second valve plate are drivingly connected to the support arm through a rotating shaft. The upper and lower adjusting gaskets and the sealing shaft sleeve are drivingly connected to the housing bearing seat through a bearing (). The rotating shaft is fixedly connected to the support arm through a gasket and a locking screw. A first flour cleaning device is arranged at the lower end of the first valve plate, and a second flour cleaning device is arranged at the lower end of the second valve plate.

[0011] The right housing is arranged on one side of the housing. The right housing is connected to the housing through fasteners, and the fasteners include but are not limited to bolts. The left housing is arranged on the other side of the housing. The left housing is connected to the housing through fasteners.

[0012] As a preferred embodiment of the present utility model, a first observation hole on the right side and a second observation hole on the left side are fixedly connected to the right housing, and a first observation hole on the left side and a second observation hole on the right side are fixedly connected to the left housing.

[0013] As a preferred embodiment of the present utility model, the outlet pipe is fixedly connected to the housing. A flow guide pipe is arranged at the connection between the upper space of the first valve plate and the second valve plate and the outlet pipe, and the flow guide pipe is installed on the outlet pipe.

[0014] As a preferred embodiment of the present utility model, the lower housing is fixedly connected to the housing, and the lower housing is integrally in an inverted conical shape.

[0015] As a preferred embodiment of the present utility model, the transmission mechanism is provided with a transmission screw and a transmission nut with a belt transmission rod. The transmission screw of the belt transmission rod is rotatably connected to the transmission mechanism. The transmission nuts of the belt transmission rod are arranged at both ends of the transmission screw. The transmission nuts of the belt transmission rod are threadedly connected to the transmission screw. The transmission nuts of the belt transmission rod are drivingly connected to the corresponding first valve plate and second valve plate through a support arm, a sealing shaft sleeve, and a rotating shaft respectively. The thread directions at both ends of the transmission screw are opposite. A handwheel is arranged on the transmission screw, and the handwheel is fixedly connected to the transmission screw. A protective shell is arranged outside the transmission mechanism, and the transmission screw and the transmission nuts of the belt transmission rod are both installed in the protective shell. The transmission nuts of the belt transmission rod adopt a die design.

[0016] As a preferred embodiment of the present utility model, the first valve plate and the second valve plate are composite ceramics composed of upper and lower metal plates sandwiching a wear-resistant ceramic plate.

[0017] As a preferred embodiment of the present utility model, it is characterized in that a powder cleaning device is provided at the bottom end of the first valve plate, and the powder cleaning device is fixedly connected to the first valve plate. A powder cleaning device is provided at the bottom end of the second valve plate, and the powder cleaning device is fixedly connected to the second valve plate.

[0018] As a preferred embodiment of the present utility model, it is characterized in that the first valve plate and the second valve plate can adjust the gap between the first valve plate, the second valve plate and the outlet pipe through a rotating shaft and upper and lower adjusting gaskets.

[0019] As a preferred embodiment of the present utility model, it is characterized in that the housing bearing seat and the rotating shaft are sealed through a sealing shaft sleeve.

[0020] As a preferred embodiment of the present utility model, it is characterized in that the right housing and the left housing are connected to the housing through fasteners, and the first valve plate and the second valve plate can be replaced without disassembling the main body.

[0021] The present utility model has the following beneficial effects compared with the prior art:

[0022] 1. For the externally-driven ceramic double-core adjustable orifice, the first valve plate and the second valve plate adopt a composite ceramic valve plate composed of a metal plate and a wear-resistant ceramic plate to ensure the wear resistance, mechanical strength and service life of the valve plate, solving the problems of non-wear-resistant valve plates of ordinary materials, low mechanical strength of ceramic valve plates and short service life.

[0023] 2. For the externally-driven ceramic double-core adjustable orifice, the corresponding powder cleaning devices are used at the bottoms of the first valve plate and the second valve plate to clean the inside of the housing, remove the pulverized coal, clean the accumulated powder inside the housing, and prevent the accumulation of powder inside the housing.

[0024] 3. For the externally-driven ceramic double-core adjustable orifice, the handwheel drives the transmission screw to rotate. The transmission screw drives the transmission nuts of the belt transmission rods to move towards each other through the opposite threads at both ends. The movement of the transmission nuts of the belt transmission rods drives the opening and closing of the first valve plate and the second valve plate. At the same time, the transmission nuts of the belt transmission rods adopt a die design, and the dies inside the transmission nuts of the belt transmission rods extrude and remove the accumulated powder on the screw, solving the problems of jamming and insensitive adjustment caused by the accumulated powder on the screw.

[0025] 4. For the externally-driven ceramic double-core adjustable orifice, the right housing and the left housing connected by fasteners on both sides of the housing can be quickly disassembled, which is convenient for the maintenance of the device. With the help of the first observation hole on the right side and the second observation hole on the left side on the right housing, and the first observation hole on the left side and the second observation hole on the right side on the left housing, it is convenient to observe the inside of the housing, so as to facilitate the determination of the maintenance position.

[0026] 5. The externally-driven ceramic double-core adjustable orifice has an inverted conical lower housing, allowing the powder accumulation at the lower part of the housing to flow out through the inverted cone of the lower housing and out of the valve, solving the problem of powder accumulation inside the housing during use.

[0027] 6. The externally-driven ceramic double-core adjustable orifice has a diversion pipe arranged between the outlet pipe and the upper space of the valve plate, increasing the pipeline fluidity between the internal space of the housing and the outlet pipe. The flowing air drives the powder accumulation inside the housing to flow, solving the problem of powder accumulation in the internal space of the housing.

[0028] 7. For the externally-driven ceramic double-core adjustable orifice, the handwheel drives the transmission screw to rotate. The transmission screw drives the transmission nuts of the belt transmission rods to move towards each other through opposite threads at both ends. The transmission nuts of the belt transmission rods are connected to the rotating shaft through the support arms, and the rotation of the rotating shaft drives the first valve plate and the second valve plate to open and close.

[0029] 8. For the externally-driven ceramic double-core adjustable orifice, the clearance between the first valve plate and the second valve plate and the outlet pipeline can be adjusted by the upper and lower adjusting gaskets of the rotating shaft.

[0030] 9. For the externally-driven ceramic double-core adjustable orifice, the housing bearing seat and the rotating shaft are sealed by a sealed shaft sleeve.

[0031] 10. For the externally-driven ceramic double-core adjustable orifice, the right housing and the left housing are connected to the housing through fasteners, and the first valve plate and the second valve plate can be replaced without disassembling the main body.

[0032] The following further describes in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Description of the Drawings

[0033] In the drawings:

[0034] Figure 1 is the overall schematic diagram of the present utility model;

[0035] Figure 2 is the sectional schematic diagram of the present utility model;

[0036] Figure 3 is the internal structure schematic diagram of the transmission mechanism of the present utility model;

[0037] Figure 4 is the valve plate structure schematic diagram of the present utility model;

[0038] Figure 5 is the structural schematic diagram between the transmission nut of the belt transmission rod and the transmission screw of the present utility model;

[0039] Figure 6 is the three-dimensional schematic diagram of the transmission nut of the transmission rod of the present utility model;

[0040] Figure 7 This is a cross-sectional view of the outlet pipe and the lower housing of the present utility model;

[0041] In the figure: 101, housing; 102, right housing; 103, left housing; 104, outlet pipe; 105, diversion pipe; 106, lower housing; 107, drive screw; 108, drive nut with a drive rod; 109, drive mechanism; 110, first observation hole on the right side; 111, second observation hole on the left side; 112, first observation hole on the left side; 113, second observation hole on the right side; 114, first valve plate; 115, first flour cleaning device; 116, second valve plate; 117, second flour cleaning device; 118, rotating shaft; 119, upper and lower adjusting gaskets; 120, support arm; 121, bearing; 122, gasket; 123, locking screw; 124, sealing shaft sleeve; 125, housing bearing seat. Specific embodiments

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model.

[0043] Please refer to Figures 1-5, an external transmission ceramic double-core adjustable shrinkage hole, including a shell 101, an outlet pipe 104 is arranged at the upper end of the shell 101, and an inverted cone-shaped lower shell 106 is arranged at the lower end of the shell 101; including a transmission mechanism 109, the transmission mechanism 109 is arranged on the shell 101, the transmission mechanism 109 is used to drive the internal components of the shell 101 to rotate, and the transmission mechanism is provided with a transmission screw 107, a transmission nut 108 with a transmission rod, an upper and lower adjustment gasket 119, a support arm 120, a bearing 121, a gasket 122, a locking screw 123, a sleeve 124, a shell bearing seat 125, a first valve plate 114, and a second valve plate 116; the first valve plate 114 and the second valve plate 116 are connected by a rotating shaft 118 The valve body 116 is connected to the support arm 120 by transmission, and the upper and lower adjustment gaskets 119, the sealing sleeve 124 and the housing bearing seat 125 are connected by transmission through the bearing 121. The rotating shaft 118 is fastened to the support arm through the gasket 122 and the locking screw 123. The lower end of the first valve plate 114 is provided with a first powder cleaning device 115, and the lower end of the second valve plate 116 is provided with a second powder cleaning device 117; it includes a right housing 102, the right housing 102 is arranged on one side of the housing 101, and the right housing 102 is connected to the housing 101 by fasteners, and the fasteners include but are not limited to bolts; the left housing 103, the left housing 103 is arranged on the other side of the housing 101, and the left housing 103 is connected to the housing 101 by fasteners. The right housing 102 is fixedly connected with the first observation hole 110 on the right side and the second observation hole 111 on the left side, and the left housing 103 is fixedly connected with the first observation hole 112 on the left side and the second observation hole 113 on the right side. The right shell 102 and the left shell 103 connected by fasteners on both sides of the shell 101 can be quickly disassembled to facilitate the maintenance of the device. The inside of the shell 101 can be observed by means of the right first observation hole 110 and the left second observation hole 111 on the right shell 102, and the left first observation hole 112 and the right second observation hole 113 on the left shell 103, thereby facilitating the determination of the maintenance position.

[0044] Among them, the outlet pipe 104 is fixedly connected to the shell 101, and a guide pipe 105 is provided in the upper space of the outlet pipe 104. One end of the guide pipe 105 is fixedly connected to the outlet pipe 104, and the other end of the guide pipe 105 is fixedly connected to the inside of the shell 101. The outlet pipe 104 increases the pipeline flowability between the internal space of the shell 101 and the outlet pipe 104 through the guide pipe 105 in the upper space, and drives the accumulated powder in the shell 101 to flow through the circulation of air, thereby solving the problem of powder accumulation in the internal space of the shell 101.

[0045] Among them, the lower shell 106 is fixedly connected to the shell 101, and the lower shell 106 is in an inverted cone shape as a whole. The lower shell 106 adopts an inverted cone shape, so that the accumulated powder at the bottom of the shell 101 flows out of the valve through the inverted cone of the lower shell 106, which solves the problem of powder accumulation inside the shell during use.

[0046] Among them, a transmission screw 107 and a transmission nut 108 of a belt transmission rod are provided inside a transmission mechanism 109. The transmission screw 107 is rotatably connected to the transmission mechanism 109. The transmission nuts 108 of the belt transmission rod are arranged at both ends of the transmission screw 107. The transmission nuts 108 of the belt transmission rod are threadedly connected to the transmission screw 107. The transmission nuts 108 of the belt transmission rod are respectively connected to the corresponding first valve plate 114 and second valve plate 116 through support arms 120, rotating shafts 118, upper and lower adjusting gaskets 119, and sealing shaft sleeves 124 for up and down transmission connection. The thread directions at both ends of the transmission screw 107 are opposite. A handwheel is provided on the transmission screw 107. The handwheel is fixedly connected to the transmission screw 107. A protective shell is arranged outside the transmission mechanism 109. The transmission screw 107 and the transmission nuts 108 of the belt transmission rod are both installed inside the protective shell. The handwheel drives the transmission screw 107 to rotate. The transmission screw 107 drives the transmission nuts 108 of the belt transmission rod to move towards each other through the opposite threads at both ends. The movement of the transmission nuts 108 of the belt transmission rod drives the support arms 120 at both ends to move accordingly. The movement of the support arms 120 at both ends drives the rotating shafts 118 at the other ends to rotate. The rotational movement of the rotating shafts 118 drives the first valve plate 114 and the second valve plate 116 to open and close. At the same time, the transmission nuts 108 of the belt transmission rod adopt a die design. The die inside the transmission nuts 108 of the belt transmission rod extrudes the accumulated powder on the screw and clears it, solving the problems of jamming and insensitive adjustment caused by the accumulated powder on the screw.

[0047] Among them, the first valve plate 114 and the second valve plate 116 are composite ceramics composed of upper and lower metal plates clamping a wear-resistant ceramic plate, having good wear resistance, high mechanical strength, and a long service life, solving the problems that the valve plates of ordinary materials are not wear-resistant, the ceramic valve plates have low mechanical strength, and the service life is short. A powder cleaning device is arranged at the bottom end of the first valve plate 114. The powder cleaning device is fixedly connected to the second valve plate 116. The first valve plate 114 and the second valve plate 116 can adjust the gap between the first valve plate 114, the second valve plate 116 and the outlet pipe 104 through the rotating shaft 118 and the upper and lower adjusting gaskets 119. The housing bearing seat 125 and the rotating shaft 118 form a seal through the sealing shaft sleeve 124. The right housing 102 and the left housing 103 are connected to the housing 101 through fasteners, and the first valve plate 114 and the second valve plate 116 can be replaced without disassembling the main body. The bottom end structure of the second valve plate 116 is the same as that of the bottom end of the first valve plate 114. At the bottom of the first valve plate 114 and the second valve plate 116, the corresponding powder cleaning devices 115 and 117 are used to clean the inside of the housing 101, remove the accumulated powder, and clean the pulverized coal inside the housing, preventing the accumulation of powder inside the housing.

[0048] Working principle: The right housing 102 and the left housing 103 connected by fasteners on both sides of the housing 101 can be quickly disassembled, facilitating the maintenance of the device. With the help of the first observation hole 110 on the right side and the second observation hole 111 on the left side on the right housing 102, and the first observation hole 112 on the left side and the second observation hole 113 on the right side on the left housing 103, it is convenient to observe the inside of the housing 101, thus facilitating the determination of the maintenance position. The outlet pipe 104 increases the pipeline fluidity between the internal space of the housing 101 and the outlet pipe 104 through the diversion pipe 105 in the upper space. The flow of air drives the accumulated powder inside the housing 101 to flow, solving the problem of accumulated powder in the internal space of the housing 101. The lower housing 106 is in an inverted cone shape, so that the accumulated powder at the lower part of the housing 101 flows out through the inverted cone of the lower housing 106, solving the problem of accumulated powder inside the housing during use. Manually rotate the handwheel, and the handwheel drives the transmission screw 107 to rotate. The transmission screw 107 drives the transmission nut 108 of the belt transmission rod to move towards each other through the opposite threads at both ends. The movement of the transmission nut 108 of the belt transmission rod drives the two end arms 120 to move accordingly. The movement of the two end arms 120 drives the rotation of the other end shaft 118. The rotational movement of the shaft 118 drives the opening and closing of the first valve plate 114 and the second valve plate 116. At the same time, the transmission nut 108 adopts a die design. The die inside the transmission nut 108 of the belt transmission rod extrudes and clears the accumulated powder on the screw, solving the problems of jamming and insensitive adjustment caused by the accumulated powder on the screw. The first valve plate 114 and the second valve plate 116 are made of composite ceramic material, improving the wear resistance and service life of the valve plate. At the bottom of the first valve plate 114 and the second valve plate 116, the corresponding powder cleaning device is used to clean the inside of the housing and remove the accumulated powder, solving the problem of internal accumulated powder. The first valve plate 114 and the second valve plate 116 can adjust the gap between the valve plate and the outlet pipe through the upper and lower adjustment gaskets 119 on the shaft 118.

[0049] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. An externally-driven ceramic double-core adjustable orifice, characterized in that include: A shell (101), wherein an outlet pipe (104) is disposed at the upper end of the shell (101), and an inverted cone-shaped lower shell (106) is disposed at the lower end of the shell (101); A transmission mechanism (109), the transmission mechanism (109) is arranged on the housing (101), and the transmission mechanism (109) is used to drive the internal components of the housing (101) to rotate. The transmission mechanism is provided with a transmission screw (107), a transmission nut (108) with a transmission rod, upper and lower adjustment gaskets (119), a support arm (120), a bearing (121), a gasket (122), a locking screw (123), a shaft sleeve (124), a housing bearing seat (125), a first valve plate (114), and a second valve plate (116); The first valve plate (114) and the second valve plate (116) are connected to the support arm (120) through a rotating shaft (118); the upper and lower adjustment gaskets (119), the sealing sleeve (124) and the housing bearing seat (125) are connected through a bearing (121); the rotating shaft (118) is connected to the support arm through a gasket (122) and a locking screw (123); the lower end of the first valve plate (114) is provided with a first powder cleaning device (115); the lower end of the second valve plate (116) is provided with a second powder cleaning device (117); A right shell (102), the right shell (102) is arranged on one side of the shell (101), and the right shell (102) is connected to the shell (101) via a fastener; a left shell (103), the left shell (103) is arranged on the other side of the shell (101), and the left shell (103) is connected to the shell (101) via a fastener.

2. The externally-driven ceramic double-core adjustable orifice according to claim 1, wherein The right shell (102) is fixedly connected with a right first observation hole (110) and a left second observation hole (111), and the left shell (103) is fixedly connected with a left first observation hole (112) and a right second observation hole (113).

3. The externally-driven ceramic double-core adjustable orifice according to claim 1, wherein The outlet pipe (104) is fixedly connected to the housing (101), and a flow guide pipe (105) is provided in the upper space of the first valve plate (114) and the second valve plate (116), and the flow guide pipe (105) is installed on the outlet pipe (104).

4. The externally-driven ceramic double-core adjustable orifice according to claim 1, characterized in that, The lower shell (106) is fixedly connected to the shell (101), and the lower shell (106) is in an inverted cone shape as a whole.

5. The externally-driven ceramic double-core adjustable orifice according to claim 1, characterized in that, The transmission mechanism (109) is provided with a transmission screw (107) and a transmission nut (108) with a transmission rod, the transmission screw (107) and the transmission nut (108) with the transmission rod are rotatably connected, and the transmission nut (108) with the transmission rod is arranged at two ends of the transmission screw (107); the thread directions of the two ends of the transmission screw (107) are opposite, a hand wheel is arranged on the transmission screw (107), and the hand wheel is fixedly connected to the transmission screw (107), the transmission mechanism (109) is provided with a protective shell, the transmission screw (107) and the transmission nut (108) with the transmission rod are both installed in the protective shell, and the transmission nut (108) with the transmission rod adopts a die design.

6. The externally-driven ceramic double-core adjustable orifice according to claim 1, characterized in that, The first valve plate (114) and the second valve plate (116) are composite ceramics consisting of an upper and a lower metal plate sandwiching a wear-resistant ceramic plate.

7. The externally-driven ceramic double-core adjustable orifice according to claim 1, characterized in that, A powder cleaning device is provided at the bottom end of the first valve plate (114), and the powder cleaning device is fixedly connected to the first valve plate (114). A powder cleaning device is provided at the bottom end of the second valve plate (116), and the powder cleaning device is fixedly connected to the second valve plate (116).

8. The externally-driven ceramic double-core adjustable orifice according to claim 1, wherein The first valve plate (114) and the second valve plate (116) can adjust the gap between the first valve plate (114), the second valve plate (116) and the outlet pipe (104) through a rotating shaft (118) and upper and lower adjusting gaskets (119).

9. The externally-driven ceramic double-core adjustable orifice according to claim 1, wherein A seal is formed between the housing bearing seat (125) and the rotating shaft (118) through a sealed shaft sleeve (124).

10. The externally-driven ceramic double-core adjustable orifice according to claim 1, wherein The right housing (102) and the left housing (103) are connected to the housing (101) through fasteners, and the first valve plate (114) and the second valve plate (116) can be replaced without disassembling the main body.

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