Cabin isolating valve for vacuum sintering machine

Abstract

The utility model relates to the technical field of isolating valves, and discloses a cabin isolating valve for a vacuum sintering machine, which comprises a cylinder, flange plates are fixedly mounted at two ends of the cylinder, through grooves are formed in the flange plates, a pair of working boxes are mounted on the circumferential side of the cylinder in a communicated manner, and electric cylinders are fixedly mounted on the sides, far away from each other, of the working boxes. A pair of center plates is arranged in the cylinder, push rods of the electric cylinders are fixedly assembled with the center plates on the same side, facility grooves are formed in the sides, close to each other, of the center plates, and a pair of baffles is installed in each facility groove through a transmission assembly. According to the utility model, the two electric cylinders simultaneously drive the central plate, the transmission assembly, the baffle plate and other structures to act, so that the stroke for shielding the through groove can be shortened by half, and the action time is further shortened; after the two center plates abut against each other, the transmission assembly can convert force in the vertical direction into force in the horizontal direction, that is, the two pairs of baffles are translated in the opposite direction, the graphite plates on the same side are aligned and pressed on the flange plate, the through groove is completely shielded, and the sealing effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of isolation valves, in particular to a cabin isolation valve for a vacuum sintering machine. Background Art

[0002] The vacuum sintering machine has several chambers with different temperatures, such as the preheating chamber, sintering chamber, and cooling chamber. The chambers are connected by gate valves. The materials to be heat treated enter the chambers in sequence along the conveyor rollers and are sealed by gate valves. After vacuuming, the set temperature is maintained by heating elements to continuously complete the heat treatment and then sent out.

[0003] The gate valve used in the prior art mainly uses an electric cylinder to reciprocate and drive the gate plate to rise and fall to achieve the connection and closure of the channel. The sealing performance is poor, resulting in a connecting gap between the two compartments, which in turn affects the vacuuming and insulation effects of the compartments; in addition, the gate plate stroke is long, usually 1.5 times the channel height, resulting in a long action time for the connection and closure of the channel. The heat exchange between the compartments will cause temperature fluctuations, affecting the temperature recovery time, and thus affecting the heat treatment efficiency.

[0004] Therefore, in order to solve the above problems, a cabin isolation valve for a vacuum sintering machine is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a cabin isolation valve for a vacuum sintering machine, which has faster action and better sealing performance, thereby solving the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a cabin isolation valve for a vacuum sintering machine, comprising a cylinder, flanges are fixedly installed at both ends of the cylinder, and the flanges are provided with through grooves. A pair of working boxes are connected and installed on the circumferential side of the cylinder, and electric cylinders are fixedly installed on the sides of the working boxes away from each other. A pair of center plates are provided inside the cylinder, and the push rods of the electric cylinders pass through the working boxes, and the push rods of the electric cylinders are respectively fixedly assembled with the center plates on the same side. Facility grooves are provided on the sides of the center plates that are close to each other, and the facility grooves are staggered. Each of the facility grooves is provided with a pair of baffles through a transmission assembly.

[0007] Specifically, the transmission assembly includes a first transmission rod, a second transmission rod and a tension spring. A pair of first transmission rods and a pair of second transmission rods are installed inside each facility slot through a rotating shaft. The ends of the first transmission rod and the second transmission rod away from the facility slot are assembled with the baffle through a rotating seat. A tension spring is hung between the left and right aligned baffles through a hanging ring, and the tension spring is located between the pair of first transmission rods and the pair of second transmission rods.

[0008] Furthermore, the pair of first transmission rods are distributed in an X shape, and the pair of second transmission rods are distributed in a V shape.

[0009] Furthermore, the rotating shaft divides the first transmission rod into a long distance section and a short distance section, wherein the long distance section is close to the baffle, and the short distance section is close to the facility slot.

[0010] Furthermore, the ends of the short distance segments away from the rotating shaft are rotatably mounted with guide wheels.

[0011] Furthermore, a flange is provided on one side of the center plates that are close to each other.

[0012] Specifically, a graphite plate is installed on the side of the baffle away from the central plate.

[0013] Specifically, at least one positioning pin is fixedly mounted on a side of one of the center plates away from the electric cylinder, and a positioning groove for inserting the positioning pin is provided on the other center plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Fast opening and closing action: Two electric cylinders simultaneously drive the center plate, transmission components, baffles and other structures to shorten the stroke of the blocking slot by half, thereby shortening the action time, reducing the degree of heat exchange between cabins, and facilitating the recovery of the cabin temperature.

[0016] Good sealing performance: After the two center plates are in contact, the transmission assembly can convert the vertical force into horizontal force, that is, translate the two pairs of baffles in opposite directions, align the graphite plates on the same side and press them onto the flange, completely covering the through groove to avoid affecting the vacuum and insulation effects of the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic front view of the structure of the utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the structure of the present utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the structure of the transmission component of the utility model;

[0020] Figure 4 This is a left side view showing the structure of the two center plates in the present invention.

[0021] In the figure: 1 electric cylinder, 2 working box, 3 flange, 4 through groove, 5 transmission assembly, 51 guide wheel, 52 first transmission rod, 53 tension spring, 54 second transmission rod, 6 center plate, 7 graphite plate, 8 baffle, 9 facility groove, 10 flange, 11 cylinder, 12 positioning pin. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1 and Figure 2 The utility model provides a cabin isolation valve for a vacuum sintering machine, including a cylinder 11. Flanges 3 are fixedly installed at both ends of the cylinder 11. The flanges 3 are provided with through grooves 4. The flanges 3 are used to connect the cabins on both sides and are locked by a bolt group. The cylinder 11 connects the cabins on both sides. The articles can enter the next cabin through the through grooves 4. The through grooves 4 are preferably rectangular grooves to adapt to the conveying structure of the vacuum sintering machine and the passability of the articles. The above is an existing structure and will not be described in detail here.

[0024] A pair of working boxes 2 are installed on the circumferential side of the cylinder 11. The working boxes 2 are distributed up and down. Electric cylinders 1 are fixedly installed on the sides of the working boxes 2 away from each other. A pair of center plates 6 are provided inside the cylinder 11. The center plates 6 are distributed up and down. The push rods of the electric cylinder 1 pass through the working boxes 2, and the push rods of the electric cylinder 1 are fixedly assembled with the center plates 6 on the same side. Correspondingly, the working boxes 2 are provided with through holes for passing the push rods. When the electric cylinder 1 moves synchronously, it can move the two center plates 6 in opposite directions (towards or away from each other) synchronously. Compared with the setting of one electric cylinder in the traditional gate valve, the action stroke is shorter and the opening and closing action is faster.

[0025] Facility slots 9 are provided on the sides of the center plates 6 that are close to each other. The facility slots 9 are staggered. Each facility slot 9 is installed with a pair of baffles 8 through the transmission assembly 5. Each pair of baffles 8 is distributed on both sides of the center plate 6. The transmission assembly 5 can make the baffles 8 on both sides move oppositely.

[0026] See also Figure 3 The transmission assembly 5 includes a first transmission rod 52, a second transmission rod 54 and a tension spring 53. A pair of first transmission rods 52 and a pair of second transmission rods 54 are rotatably installed inside each facility slot 9 through a rotating shaft. The rotating shaft is fixedly installed in the facility slot 9 to provide an installation base so that the first transmission rod 52 and the second transmission rod 54 can rotate on the rotating shaft.

[0027] The ends of the first transmission rod 52 and the second transmission rod 54 away from the facility groove 9 are rotatably assembled with the baffle 8 through a rotating seat, and a tension spring 53 is hung between the left and right aligned baffles 8 through a hanging ring. The tension spring 53 is located between a pair of first transmission rods 52 and a pair of second transmission rods 54. The tension spring 53 makes the left and right aligned baffles 8 have a force to move closer to each other.

[0028] The pair of first transmission rods 52 are distributed in an X shape, and the pair of second transmission rods 54 are distributed in a V shape, so that the left and right aligned baffles 8 can always maintain a parallel posture to each other.

[0029] Specifically, after the two electric cylinders 1 move the center plate 6 away from each other, each pair of baffles 8 will move closer to each other under the pull of the tension spring 53 and the transmission of the second transmission rod 54 and the second transmission rod 54 until they abut against both sides of the center plate 6. At this time, the center plate 6 and baffle 8 and other structures on each side will enter the working box 2, and the baffle 8 will no longer block the through slot 4, and items can pass through.

[0030] When the two electric cylinders 1 move the center plates 6 closer to each other until the two center plates 6 abut against each other, the two first transmission rods 52 distributed in an X shape gradually abut against the center plate 6 on the other side, and will translate the baffle 8 away from each other until the through slot 4 is blocked, while stretching the tension spring 53.

[0031] In addition, the rotating shaft separates the first transmission rod 52 and forms a long-distance section and a short-distance section. The long-distance section is close to the baffle 8, and the short-distance section is close to the facility slot 9. The lever structure formed by the first transmission rod 52 with the rotating shaft as the center can amplify the swinging action of the long-distance section after the short-distance section is subjected to force, so that the translation action of the baffle 8 is faster.

[0032] The ends of the short distance segments away from the rotating shaft are rotatably mounted with guide wheels 51, which can reduce the friction between the short distance segments and the center plate 6, making the swing of the first transmission rod 52 smoother and reducing component loss.

[0033] A flange 10 is provided on one side of the center plate 6 where the center plates 6 are close to each other. The flange 10 is used to expand the thickness of the center plate 6 so that the guide wheel 51 has enough walking space.

[0034] A graphite plate 7 is installed on the side of the baffle 8 away from the center plate 6 by screw connection. The graphite plate 7 has good high temperature resistance. When the baffle 8 blocks the through groove 4, the graphite plate 7 and the flange 3 are abutted to isolate the temperature transfer between the two compartments and reduce the mutual influence of the temperature between the compartments.

[0035] See also Figure 4At least one positioning pin 12 is fixedly installed on the side of one center plate 6 away from the electric cylinder 1, and a positioning groove for inserting the positioning pin 12 is opened on the other center plate 6. The positioning pin 12 is preferably frustum-shaped, and correspondingly, the positioning groove is also a matching frustum-shaped groove. In the process of the two center plates 6 abutting against each other, the positioning pin 12 is gradually inserted into the positioning groove to improve the abutment accuracy.

[0036] How this implementation works:

[0037] The electric cylinder 1 is electrically connected to the control cabinet of the vacuum sintering machine. The control cabinet is an existing facility composed of components such as a controller, a touch screen operation interface, a main power switch, a circuit breaker, and a surge protector, which is used to coordinate the actions of various components during the heat treatment process.

[0038] When the isolation valve between the compartments needs to be opened, the control cabinet controls the corresponding two electric cylinders 1 to move the center plate 6 away from each other. At the same time, the two pairs of baffles 8 are reset due to the transmission assembly 5, and then abut against the center plate 6 on the same side, and then enter the working box 2. At this time, the conveyor roller of the vacuum sintering machine transports the items to the next compartment.

[0039] Then control the two electric cylinders 1 to move the center plate 6 closer to each other until they are tight. During this process, due to the transmission of the transmission component 5, the baffle 8 will be translated away from each other, pressing the graphite plate 7 onto the flange 3. At this time, the two graphite plates 7 on the left and the two graphite plates 7 on the right are aligned to form two complete isolation plates, which respectively seal and block the through groove 4 to complete the isolation.

[0040] After the heat treatment of this compartment is completed, the above actions are repeated to operate the next isolation valve to allow the items to enter the next compartment until all heat treatment processes are completed and the items are sent out.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A chamber isolation valve for a vacuum sintering machine, comprising a cylinder (11), with flanges (3) fixedly mounted at both ends of the cylinder (11), each flange (3) being provided with a through slot (4), characterized in that: A pair of working boxes (2) are connected and installed on the circumferential side of the cylinder (11), and an electric cylinder (1) is fixedly installed on the side of the working boxes (2) away from each other. A pair of center plates (6) are provided inside the cylinder (11), and the push rods of the electric cylinder (1) pass through the working boxes (2), and the push rods of the electric cylinder (1) are respectively fixedly assembled with the center plates (6) on the same side. A facility groove (9) is opened on the side of the center plates (6) close to each other, and the facility grooves (9) are staggered. Each of the facility grooves (9) is installed with a pair of baffles (8) through a transmission assembly (5).

2. The compartment isolation valve for a vacuum sintering machine according to claim 1, characterized in that: The transmission assembly (5) includes a first transmission rod (52), a second transmission rod (54) and a tension spring (53). A pair of first transmission rods (52) and a pair of second transmission rods (54) are rotatably installed inside each facility slot (9) via a rotating shaft. The ends of the first transmission rod (52) and the second transmission rod (54) away from the facility slot (9) are rotatably assembled with the baffle (8) via a rotating seat. A tension spring (53) is hung between the baffles (8) aligned on the left and right via a hanging ring. The tension spring (53) is located between the pair of first transmission rods (52) and the pair of second transmission rods (54).

3. The compartment isolation valve for a vacuum sintering machine according to claim 2, characterized in that: The pair of first transmission rods (52) are distributed in an X-shape, and the pair of second transmission rods (54) are distributed in a V-shape.

4. The compartment isolation valve for a vacuum sintering machine according to claim 2, characterized in that: The rotating shaft separates the first transmission rod (52) and forms a long distance section and a short distance section, wherein the long distance section is close to the baffle (8) and the short distance section is close to the facility slot (9).

5. The compartment isolation valve for a vacuum sintering machine according to claim 4, characterized in that: The ends of the short distance sections away from the rotating shaft are rotatably mounted with guide wheels (51).

6. The compartment isolation valve for a vacuum sintering machine according to claim 1, characterized in that: A flange (10) is provided on one side of the center plates (6) that is close to each other.

7. The compartment isolation valve for a vacuum sintering machine according to claim 1, characterized in that: A graphite plate (7) is installed on the side of the baffle (8) away from the center plate (6).

8. The compartment isolation valve for a vacuum sintering machine according to claim 1, characterized in that: At least one positioning pin (12) is fixedly mounted on a side of one of the center plates (6) away from the electric cylinder (1), and a positioning groove for inserting the positioning pin (12) is provided on the other center plate (6).

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