A crucible fixture used in vacuum sintering process

Abstract

The present invention relates to the technical field of crucible clamps, and in particular to a crucible clamp used in a vacuum sintering process, comprising a cover plate, a telescopic member, a sleeve pipe, a top pipe, a support member, a clamping member, a drive assembly and a guide rod, wherein the crucible comprises an open end and an outer wall, and a second tooth groove is constructed near the open end of the outer wall of the crucible. The crucible clamp used in the vacuum sintering process can effectively seal the open end of the crucible by setting a cover plate on the open end of the crucible and opening a through hole on the cover plate, and introduce protective gas through the through hole, thereby overcoming the problem that the traditional clamping device lacks a gas isolation mechanism, thereby effectively preventing the contamination and oxidation of the material inside the crucible. Secondly, by setting a first tooth groove on the clamping member and engaging it with the second tooth groove on the outer wall of the crucible, the cover plate is stably connected to the crucible, thereby overcoming the problem of sliding or loosening of the clamping member caused by the smooth surface of the crucible in the traditional clamping method.

Description

Technical Field

[0001] The invention relates to a crucible clamp, in particular to a crucible clamp used in a vacuum sintering process. Background Art

[0002] In the field of high-temperature industry, graphite crucibles are widely used in high-temperature processing processes. A crucible usually includes a containing space and an open end connected to the containing space. The traditional crucible fixture structure mainly relies on mechanical clamping to fix the outer wall of the crucible through an external clamping device to prevent the crucible from moving or tipping over during operation.

[0003] However, the traditional crucible clamping device is relatively simple, and the clamping effect is easily affected in a high-temperature environment. First, due to the smooth surface of the graphite crucible, the traditional clamping method is difficult to ensure sufficient clamping force in a high-temperature environment, which causes the clamp to easily slip or loosen during the engagement process, affecting the working stability of the equipment. In addition, traditional equipment is often bulky in structure and relies heavily on external forces during operation, making it easy for the crucible to detach from the clamp. In addition, due to the lack of an effective protection mechanism for traditional clamps, the material inside the crucible is easily contaminated and oxidized by the external environment, which directly affects the quality of the material. Therefore, it is urgent to design a crucible clamp for use in vacuum sintering processes to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a high temperature resistant clamp which can realize stable clamping under high temperature conditions and can effectively prevent the internal material of the crucible from being contaminated by the outside world.

[0005] The technical solution adopted by the present invention to solve the above problem is: a crucible fixture applied to a vacuum sintering process, wherein the crucible comprises a containing space and an open end connected to the containing space, and a second tooth groove is arranged on the peripheral side of the open end, comprising:

[0006] The cover plate is arranged on the opening end of the crucible to close the opening end, and the cover plate is provided with a through hole along the thickness direction thereof.

[0007] The top pipe is fixedly connected to the top of the cover plate.

[0008] The telescopic member is arranged inside the jacking pipe, and the telescopic member includes a telescopic end with controlled movement.

[0009] A sleeve pipe is slidably sleeved on the outside of the jacking pipe, and one end of the sleeve pipe is connected to the telescopic end of the telescopic member so that the sleeve pipe moves with the telescopic end of the telescopic member.

[0010] A support member is fixedly connected to the top of the cover plate.

[0011] A clamping member is provided with a first tooth groove which can be meshed with a second tooth groove, and a guide groove is also provided on the clamping member.

[0012] A driving assembly, a driving assembly, the clamping member is connected to the supporting member through the driving assembly, and the driving assembly is connected to the sleeve tube so that the driving assembly moves with the movement of the sleeve tube, thereby driving the clamping member to move.

[0013] A guide rod is arranged on the side of the cover plate away from the crucible, the axis of the guide rod is parallel to the plane of the side of the cover plate away from the crucible, the guide rod is inserted into the guide groove, and the outer peripheral side of the guide rod is slidably connected to the inner wall of the guide groove to limit the movement path of the clamping member.

[0014] The first tooth groove includes a first state and a second state, wherein in the first state, the telescopic end of the telescopic member is extended to drive the sleeve tube to move in a direction away from the cover plate, so that the sleeve tube drives the clamping member to move through the driving assembly, and the first tooth groove and the second tooth groove are meshed and connected by the sliding cooperation between the guide rod and the guide groove, so that the cover plate is subjected to a force directed to the open end of the crucible under the cooperation of the first tooth groove and the second tooth groove; in the second state, the telescopic end of the telescopic member is contracted to drive the sleeve tube to move toward the cover plate, so that the sleeve tube drives the clamping member to move through the driving assembly, and the first tooth groove and the second tooth groove are separated by the sliding cooperation between the guide rod and the guide groove, so that the cover plate can be separated from the crucible.

[0015] Preferably, an air inlet pipe connected to the through hole is provided on the top of the cover plate to introduce protective gas into the accommodating space.

[0016] Preferably, a control valve is installed on the air intake pipe to control the opening and closing of the air intake pipe.

[0017] Preferably, the notch of the first tooth groove is arranged toward the sleeve tube, and the notch direction of the first tooth groove extends away from the cover plate, and the orientation of the second tooth groove is adapted to the first tooth groove so that the first tooth groove can mesh with the second tooth groove.

[0018] Preferably, the drive assembly comprises:

[0019] A connecting plate, one end of which is rotatably connected to the supporting member via a first rotating shaft.

[0020] A connecting rod is connected to the other end of the connecting plate in a rotatable manner, and one end of the connecting rod facing away from the connecting plate is hinged to the sleeve tube.

[0021] Wherein, the connecting plate is rotatably connected to the clamping member via a second rotating shaft, and a connection point between the second rotating shaft and the connecting plate is located between two ends of the connecting plate.

[0022] Preferably, a supporting member is provided at the bottom of the clamping member, and a first abutting surface is provided on the side of the supporting member facing the top tube. The position of the supporting member is configured so that when the first tooth groove is engaged with the second tooth groove, the supporting member is located on the side of the guide rod away from the top tube, and the first abutting surface abuts against the peripheral side of the guide rod.

[0023] Preferably, a first inclined surface is provided on a side of the supporting member facing the cover plate.

[0024] A slot is provided at the top of the cover plate at a position opposite to the abutting member, and an ejector member movable up and down is provided in the slot, one end of the ejector member is provided in the accommodating space, and a floating plate is provided at the end, and the other end of the ejector member is provided at a side of the cover plate away from the crucible, and a second inclined surface is provided at the end facing the side of the clamping member, so that after the ejector member moves to a preset position, it abuts against the first inclined surface to limit the movement of the clamping member in a direction away from the cover plate.

[0025] Preferably, the ejector is shaped so as to be able to move only up and down in the slot.

[0026] Preferably, an elastic member is provided between the floating plate and the cover plate to apply an elastic force to the floating plate away from the cover plate.

[0027] Beneficial effects of the embodiments of the present invention

[0028] On the one hand, the crucible clamp used in the vacuum sintering process, by arranging a cover plate with a through hole on the open end of the crucible, can not only achieve effective sealing of the open end of the crucible, but also introduce protective gas through the through hole, so as to overcome the problem that the traditional clamping device lacks a gas isolation mechanism, effectively reduce the contamination and oxidation of the material inside the crucible, and improve the quality of the material. Furthermore, by arranging a first tooth groove on the clamping piece and engaging it with the second tooth groove on the outer wall of the crucible, a stable connection between the cover plate and the crucible is achieved, and the problem of sliding or loosening of the clamping piece caused by the smooth surface of the crucible in the traditional clamping method is overcome, thereby enhancing the working stability and safety of the equipment. Furthermore, through the cooperation of the guide rod and the guide groove and the joint action with the drive assembly, the cover plate is pressed toward the open end of the crucible to prevent the cover plate from loosening.

[0029] On the other hand, the crucible clamp used in the vacuum sintering process has a supporting piece on the side of the clamping piece facing the cover plate, and a first supporting surface and a first inclined surface are provided on the supporting piece; an ejector piece movable along its own thickness direction is provided on the cover plate, and a second inclined surface is constructed at one end of the ejector piece facing the clamping piece; when an external protective gas source introduces protective gas into the accommodating space, the ejector piece is lifted up by the action of the floating plate, so that the second inclined surface abuts against the first inclined surface, so that the clamping piece is fully limited under the cooperation of the telescopic piece, the ejector piece, the guide rod and the guide groove, which can effectively avoid the loosening of the clamp and the crucible caused by the accidental separation of the first tooth groove and the second tooth groove, and further enhance the working stability and safety of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structure of an embodiment of the present invention. Figure 1 .

[0031] Figure 2 It is a front cross-sectional view of an embodiment of the present invention.

[0032] Figure 3 The present invention Figure 2 Enlarged view of point A in the middle.

[0033] Figure 4 It is a schematic diagram of the connection state of the first tooth groove and the second tooth groove in one embodiment of the present invention, when the guide rod is located at the meshing section.

[0034] Figure 5 It is a schematic diagram of the connection state of the first tooth groove and the second tooth groove in one embodiment of the present invention, in which the guide rod is located at the reversing section.

[0035] Figure 6 It is a schematic diagram of the connection state of the first tooth groove and the second tooth groove in one embodiment of the present invention, when the guide rod is located at the separation section.

[0036] Figure 7 A schematic structure of an embodiment of the present invention Figure 2 .

[0037] Figure 8 is a side sectional view of an embodiment of the present invention.

[0038] Among them: 100, crucible; 110, accommodating space; 120, second tooth groove; 200, cover plate; 210, air inlet pipe; 220, ejector pipe; 230, second sleeve; 231, support rod; 240, first sleeve; 250, telescopic member; 260, support member; 270, first rotating shaft; 280, second rotating shaft; 290, connecting rod; 300, clamping member; 310, first tooth groove; 320, guide groove; 321, meshing section; 322, reversing section; 323, separation section; 330, abutting member; 331, first inclined surface; 332, first abutting surface; 400, connecting plate; 500, guide rod; 600, ejector; 610, second inclined surface; 620, floating plate; 700, mounting bracket. DETAILED DESCRIPTION

[0039] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0042] like Figure 1 to Figure 2 and Figures 7 and 8As shown. A crucible 100 fixture for vacuum sintering process in a preferred embodiment of the present application is provided, comprising a cover plate 200, a telescopic member 250, a sleeve pipe, a top pipe 220, a support member 260, a clamping member 300, a driving assembly and a guide rod 500. The crucible 100 comprises an open end and an outer wall, a second tooth groove 120 is configured near the open end of the outer wall of the crucible 100, and the second tooth groove 120 can be meshed and connected with the first tooth groove 310 on the clamping member 300, the cover plate 200 is used to close the outlet end of the crucible 100 to prevent internal gas leakage, the cover plate 200 is configured with a through hole along its thickness direction for the entry of protective gas, the top of the cover plate 200 is also fixedly connected with a support member 260 and a top pipe 220, the outer sliding sleeve of the top pipe 220 is provided with a sleeve pipe, the sleeve pipe is driven by the telescopic member 250, and the sleeve pipe comprises a first sleeve pipe 240 and a second sleeve pipe 230. The clamping member 300 is an important component connecting the cover plate 200 and the crucible 100. It is meshed with the second tooth groove 120 on the crucible 100 through the first tooth groove 310 to ensure the stable fixation of the cover plate 200. A guide groove 320 is constructed on the clamping member 300. The guide rod 500 is fixedly arranged on the side of the cover plate 200 away from the crucible 100. The axis of the guide rod 500 is parallel to the plane of the side of the cover plate 200 away from the crucible 100. The guide rod 500 is inserted into the guide groove 320. The outer peripheral side of the guide rod 500 is slidably connected to the inner wall of the guide groove 320, so that the movement trajectory of the clamping member 300 is limited by the cooperation between the guide rod 500 and the guide groove 320, thereby ensuring that the first tooth groove 310 can be meshed and connected with the second tooth groove 120 to prevent the two from shifting during the meshing process.

[0043] The first tooth groove 310 includes a first state and a second state, wherein, in the first state, the telescopic end of the telescopic member 250 is extended to drive the sleeve tube to move in a direction away from the cover plate 200, so that the sleeve tube drives the clamping member 300 to move through the driving assembly, and the clamping member 300 is engaged with the second tooth groove 120 under the sliding cooperation of the guide rod 500 and the guide groove 320, so that the cover plate 200 is pressed toward the open end of the crucible 100 under the cooperation of the first tooth groove 310 and the second tooth groove 120, and in the second state, the telescopic end of the telescopic member 250 is contracted to drive the sleeve tube to move toward the cover plate 200, so that the sleeve tube drives the clamping member 300 to move through the driving assembly, and the clamping member 300 is separated from the first tooth groove 310 and the second tooth groove 120 under the sliding cooperation of the guide rod 500 and the guide groove 320, so that the cover plate 200 can be separated from the crucible 100.

[0044] The high temperature resistant clamp for the graphite crucible 100 is used to fix the cover plate 200 at the outlet end of the crucible 100 by meshing and locking the first tooth groove 310 and the second tooth groove 120 between the cover plate 200 and the crucible 100. Furthermore, the guide rod 500 cooperates with the guide groove 320 to enable the clamping member 300 to move precisely in a directional manner. Under the cooperation of the guide rod 500 and the guide groove 320 and the joint action of the driving component, a force is applied to the cover plate 200 to be pressed toward the open end of the crucible 100, thereby achieving efficient sealing and stable fixation of the cover plate 200 and the crucible 100, and avoiding the loosening and gas leakage problems of the conventional crucible 100 clamp in the process of clamping the crucible 100.

[0045] The main function of the crucible 100 is to hold and heat the material to be processed. The outer wall of the crucible 100 is made of high-strength graphite, and the shape is usually cylindrical or truncated cone, with good high temperature resistance and corrosion resistance. The main function of the crucible 100 is to hold the material to be processed in a high temperature environment to ensure that it will not be deformed or damaged at high temperatures. The crucible 100 also includes an inner wall and an inner bottom wall, and the inner wall and the inner bottom wall are surrounded to form a accommodating space 110. The opening at the top of the crucible 100 is convenient for loading and unloading materials. The second tooth groove 120 on the outer wall of the crucible 100 is integrally formed to ensure structural stability and strength under high temperature conditions. The second tooth groove 120 is made by precision machining to ensure that it can achieve seamless meshing with the first tooth groove 310, thereby ensuring a sealing effect. The shape and size of the crucible 100 can be customized according to specific application requirements to adapt to different high temperature processes.

[0046] The cover plate 200 is used to seal the top of the crucible 100 to prevent the internal materials from contacting the external environment, especially to prevent oxidation or contamination of the materials at high temperatures. The shape of the cover plate 200 matches the shape of the top of the crucible 100, and is usually circular or polygonal. A through hole is provided at the center of the top of the cover plate 200, which is connected to the interior of the crucible 100. The air inlet pipe 210 is installed at the through hole of the cover plate 200, and is used to introduce protective gas, such as nitrogen or argon, into the crucible 100, which is a protective gas source, so as to maintain the stability of the atmosphere inside the crucible 100. In addition, the sealing performance between the cover plate 200 and the crucible 100 is directly related to the atmosphere control inside the crucible 100, so the selection of the material of the cover plate 200 and the processing accuracy are crucial.

[0047] Furthermore, in order to facilitate the control of the air pressure in the accommodation space 110 after the open end is closed by the cover plate 200, an air inlet pipe 210 connected to the through hole is provided on the top of the cover plate 200. A control valve (not shown in the figure) and a pressure relief valve (not shown in the figure) that can control the on-off of the air inlet pipe 210 are installed on the air inlet pipe 210. The other end of the air inlet pipe 210 is connected to a protective air source. When the air pressure in the accommodation space 110 needs to be adjusted, the gas in the accommodation space 110 can be discharged through the pressure relief valve.

[0048] The support member 260 is fixedly connected to the top of the cover plate 200, providing support for the top pipe 220, and ensuring the structural stability of the cover plate 200. The support member 260 is embodied as two parallel plates in the specific embodiment, and both plates are fixed to the side of the cover plate 200 away from the crucible 100. In this embodiment, the support member 260 plays the role of providing a connection position for the connecting plate 400 described later.

[0049] The clamping member 300 is a key component for achieving a stable connection between the cover plate 200 and the crucible 100. Its shape is approximately "L" shaped, and the material is generally selected from high-strength alloy steel or high-temperature resistant composite materials. In this embodiment, the first tooth groove 310 is constructed at the position of the short side of the "L" shape, such as Figure 2 As shown. The clamping member 300 is connected to the sleeve tube through a driving assembly, and the sleeve tube moves synchronously with the movement of the telescopic end of the telescopic member 250, thereby realizing the driving of the clamping member 300. In the above process, the clamping member 300 uses the telescopic end of the telescopic member 250 as a power source to realize the engagement or separation of the first tooth groove 310 and the second tooth groove 120. In actual operation, when the clamping member 300 is extended at the telescopic end of the telescopic member 250, the first tooth groove 310 will move toward the second tooth groove 120 and engage with it, thereby realizing the fixation of the cover plate 200; on the contrary, when the telescopic end of the telescopic member 250 moves in the opposite direction, the first tooth groove 310 is separated from the second tooth groove 120, and the cover plate 200 is unlocked. In addition, the design of the clamping member 300 takes into account the thermal expansion and contraction effects that may occur during operation, and its material selection and structural design ensure that it can still maintain a stable connection state in a high temperature environment.

[0050] Further, the first tooth groove 310 is arranged on the clamping member 300, and the second tooth groove 120 is arranged on the outer wall of the crucible 100. The tooth groove is designed to be sawtooth-shaped or rectangular-shaped, and the mechanical locking of the cover plate 200 and the crucible 100 is achieved by the meshing of the tooth groove. The design and processing accuracy of the tooth groove directly affect the firmness and sealing of the connection. Therefore, during the design process, it is necessary to ensure that the tooth shape and size of the tooth groove are strictly matched to avoid poor meshing or loosening problems. The processing of the tooth groove usually adopts high-precision CNC machine tools to ensure its accuracy and surface quality.

[0051] like Figure 2As shown, the sleeve pipe is fixedly spliced ​​by the first sleeve pipe 240 and the second sleeve pipe 230. The first sleeve pipe 240 has a closed end and an open end, and the closed end and the open end are respectively located at the two ends of the extension direction of the first sleeve pipe 240. The two ends of the second sleeve pipe 230 in its own extension direction are set as open ends. One end of the second sleeve pipe 230 is fixedly connected to the open end of the first sleeve pipe 240 to form the entire sleeve pipe. When the sleeve pipe is movably sleeved on the top pipe 220, the telescopic end of the telescopic member 250 is fixedly connected to the closed end of the first sleeve pipe 240 to drive the sleeve pipe to move. A support rod 231 is fixedly arranged on the side of the outer side of the second sleeve pipe 230 away from the first sleeve pipe 240, and the support rod 231 is transmission-connected to the clamping member 300 through a driving assembly.

[0052] The telescopic member 250 is fixedly installed inside the top pipe 220, and its main function is to drive the clamping member 300 to move along the direction of the guide rod 500. The telescopic member 250 is usually a pneumatic or hydraulic drive device, and its telescopic end is fixedly connected to the second sleeve 230.

[0053] In order to ensure the accuracy and stability of the clamping member 300 during the movement, the guide rod 500 and the guide groove 320 need to cooperate to control the movement trajectory of the clamping member 300. The guide rod 500 is a part of the guide assembly, and the guide assembly also includes a fixed plate, which is fixedly arranged on the side of the cover plate 200 away from the crucible 100. The guide rod 500 is fixedly connected to the fixed plate, and the axial direction of the guide rod 500 is perpendicular to the plane of the fixed plate. The guide groove 320 on the clamping member 300 is slidably matched with the guide rod 500 to control the movement trajectory of the clamping member 300. The function of the guide assembly is to provide a fixed movement trajectory in the process of the telescopic member 250 pushing the clamping member 300 to move, to ensure the directional movement of the clamping member 300, and to avoid deviation caused by external force or thermal expansion and contraction. The guide plate and the guide rod 500 are usually made of high-hardness wear-resistant materials to ensure their long-term service life under high temperature and high-frequency operation.

[0054] In one embodiment, in order to further enhance the engagement strength between the first tooth groove 310 and the second tooth groove 120 when the crucible 100 is carried, the notch of the first tooth groove 310 can be arranged obliquely toward the sleeve tube, and the orientation of the second tooth groove 120 is adapted to the first tooth groove 310, so that the first tooth groove 310 can mesh with the second tooth groove 120, as shown in FIG. Figure 2 The clamping member 300 includes a third state, a fourth state and a fifth state under the joint action of the guide rod 500 and the guide groove 320, as shown in FIG. Figures 4 to 6The guide groove 320 is composed of an engagement section 321, a reversing section 322 and a separation section 323, wherein when the guide rod 500 is located at the engagement section 321, the first tooth groove 310 on the clamping member 300 is engaged with the second tooth groove 120; during the movement of the guide rod 500 from the engagement section 321 to the reversing section 322, the movement trajectory of the first tooth groove 310 moves obliquely away from the cover plate 200 and the top pipe 220, and the movement direction of the first tooth groove 310 is parallel to the opening direction of the groove, as shown in FIG. Figure 5 As shown, the first tooth groove 310 with the inclined notch can be smoothly separated from the second tooth groove 120. During the process of the guide rod 500 moving from the reversing section 322 to the separation section 323, the clamping member 300 continues to drive the first tooth groove 310 to move away from the second tooth groove 120 until the clamping member 300 is completely separated from the crucible 100, and when the clamp is separated from the crucible 100, there will be no motion interference between the two.

[0055] Under the cooperation of the guide groove 320 and the guide rod 500, when the guide rod 500 is in the meshing section 321, when the first tooth groove 310 obliquely arranged at the notch meshes with the second tooth groove 120, there is a tendency for relative movement between the cover plate 200 and the crucible 100, so that the cover plate 200 is firmly pressed against the open end of the crucible 100, so as to further make the cover plate 200 tightly abut against the open end of the crucible 100.

[0056] The driving assembly includes a connecting plate 400 and a connecting rod 290. One end of the connecting plate 400 is rotatably connected to the support member 260 through the first rotating shaft 270, one end of the connecting rod 290 is rotatably connected to the other end of the connecting plate 400, one end of the connecting rod 290 is hinged to the support rod 231 on the second sleeve 230, the connecting plate 400 is rotatably connected to the clamping member 300 through the second rotating shaft 280, and the connection between the second rotating shaft 280 and the connecting plate 400 is located between the two ends of the connecting plate 400.

[0057] Specifically, the closed end of the first sleeve 240 is fixedly connected to the telescopic end of the telescopic member 250, and moves axially with the telescopic member 250. The top end of the second sleeve 230 is fixedly connected to the bottom end of the first sleeve 240 to form an integral sliding mechanism. In this way, when the second sleeve 230 moves, the first sleeve 240 also moves synchronously. They are connected to each other by a fixed connection and driven by the telescopic member 250 to achieve axial movement.

[0058] The support member 260 is also rotatably connected to the connecting plate 400 via the first rotating shaft 270 , allowing the connecting plate 400 to rotate so as to cooperate with the telescopic movement of the telescopic member 250 .

[0059] The connecting plate 400 plays a role of transmission in the structure, and realizes the overall mechanical movement by connecting with the support member 260 and the clamping member 300. The connecting plate 400 is connected to the support member 260 through the first rotating shaft 270, and is connected to the clamping member 300 through the second rotating shaft 280. In addition, the connecting plate 400 is also connected to the second sleeve 230 through the connecting rod 290 and the support rod 231.

[0060] The connecting rod 290 plays a role in transmitting motion between the first sleeve 240 and the connecting plate 400. Its two ends are respectively hingedly connected to the support rod 231 of the first sleeve 240 and the connecting plate 400.

[0061] The clamping member 300 is rotatably connected to the connecting plate 400 via the second rotating shaft 280, allowing the clamping member 300 to rotate relative to the connecting plate 400 to cooperate with the movement of the first sleeve 240 and the second sleeve 230 to complete the engagement and locking operations.

[0062] When the telescopic member 250 is extended, the second sleeve 230 and the first sleeve 240 are driven to move axially along the top tube 220, and the support rod 231 on the second sleeve 230 is hinged with the connecting rod 290, which drives the connecting plate 400 to rotate, thereby making the first tooth groove 310 of the clamping member 300 mesh with the second tooth groove 120 of the crucible 100, so as to fix the cover plate 200 at the outlet end of the crucible 100. The first rotating shaft 270 and the second rotating shaft 280 provide the connecting plate 400 and the clamping member 300 with a degree of rotational freedom, making the meshing process smoother and effectively avoiding poor connection caused by mechanical stress.

[0063] like Figure 3 As shown. The present invention also provides a crucible 100 clamp for vacuum sintering process for solving the problem that the clamping member 300 may move unexpectedly after the cover plate 200 and the crucible 100 are tightly closed, comprising a cover plate 200, a clamping member 300, an ejector 600, a guide rod 500 and a support member 330. These components cooperate with each other to ensure that the clamping member 300 can remain stable after the cover plate 200 and the crucible 100 are tightly closed, and prevent accidental movement caused by external force or internal air pressure changes, thereby enhancing the operational safety and reliability of the entire device.

[0064] The abutment member 330 is disposed at the bottom of the clamping member 300 to limit the movement of the clamping member 300 after engagement. The bottom of the abutment member 330 is configured with a first inclined surface 331, and the side thereof is configured with a first abutment surface 332. After the first tooth groove 310 is engaged with the second tooth groove 120, the outer side surface of the guide rod 500 abuts against the first abutment surface 332 on the ejector 600, so that the clamping member 300 is more stable.

[0065] Furthermore, the ejector 600 is a key component for limiting the movement of the clamping member 300. It is located in the slot of the cover plate 200 and can move up and down under the action of gas pressure. A second inclined surface 610 is provided on the top of the ejector 600. When the gas pressure inside the crucible 100 increases, the ejector 600 moves upward until the second inclined surface 610 abuts against the first inclined surface 331 of the clamping member 300, forming a locking effect, so that the posture of the clamping member 300 after engagement is fixed, thereby limiting the posture of the clamping member 300 and preventing the clamping member 300 from moving relative to each other after engagement.

[0066] In some embodiments, one end of the ejector 600 is located in the accommodating space 110, and a floating plate 620 is provided at the end, and the other end of the ejector 600 is located on the side of the cover plate 200 away from the crucible 100, and the end is configured as a second inclined surface 610, so as to abut against the first inclined surface 331 after the ejector 600 moves upward, thereby limiting the movement of the clamping member 300. In addition, the shape of the ejector 600 is configured to be able to move up and down only in the slot.

[0067] Furthermore, an elastic member (not shown in the figure) is provided between the floating plate 620 and the cover plate 200 to apply an elastic force to the floating plate 620 away from the cover plate 200, so that the overall state of the floating plate 620 is more stable, and the floating plate 620 can remain stable under the action of the elastic force and other external forces when it is in a relatively static state or in a relative motion state with the cover plate 200.

[0068] During use, when the internal air pressure of the crucible 100 increases, the ejector 600 located in the slot at the top of the cover plate 200 is forced to move upward under the push of the floating plate 620, and the second inclined surface 610 of the ejector 600 contacts the first inclined surface 331 of the clamping member 300, thereby limiting the movement of the clamping member 300. At the same time, the side surface of the guide rod 500 contacts the first abutting surface 332 of the abutting member 330, so that the posture of the clamping member 300 is completely fixed. Under the dual effects of the upward movement of the ejector 600 and the guide rod 500, the clamping member 300 cannot move relative to each other after the cover plate 200 and the crucible 100 are engaged, thereby ensuring that the first tooth groove 310 and the second tooth groove 120 are continuously and tightly engaged, avoiding loosening or separation due to external force or air pressure changes.

[0069] Therefore, through the precise matching of the above structure, the present invention effectively solves the problem of accidental movement of the clamp 300 after the cover plate 200 and the crucible 100 are tightly closed. The synergistic effect of the ejector 600 and the guide rod 500 ensures the fixity and stability of the clamp 300, so that the clamp 300 cannot move relative to the crucible 100 after engagement, greatly improving the operational safety and sealing performance of the device. This design not only improves the stability of the mechanical connection, but also enhances the anti-interference ability of the system under complex working conditions, so that the device can operate reliably in a high-temperature positive pressure environment.

[0070] It can be understood that in order to control the opening and closing state of the cover plate 200 and the outlet end of the crucible 100, the pressure relief valve can be controlled to discharge the gas in the crucible 100, so that the ejector 600 moves back under the action of gravity or the elastic force of a set spring to separate the first inclined surface 331 from the second inclined surface 610. Then, it is only necessary to move the telescopic end of the telescopic member 250 toward the direction close to the crucible 100, so that the clamping member 300 can be directed to move in cooperation with the guide rod 500 and the guide groove 320 until the first tooth groove 310 is separated from the second tooth groove 120.

[0071] In some embodiments, a mounting bracket 700 is fixedly connected to the top of the cover plate 200 , that is, the side of the cover plate 200 facing away from the crucible 100 , so that the cover plate 200 can be connected to other mechanisms.

[0072] In summary, the present invention provides a device for a crucible 100 clamp used in a vacuum sintering process, which can achieve a tight connection between the cover plate 200 and the crucible 100 under a high temperature environment through the innovative design of the graphite crucible 100 clamp. The device achieves efficient sealing and stable fixation of the graphite crucible 100 through the coordinated action of the cover plate 200, the clamping member 300, the tooth groove matching, the guide rod 500 and the ejector 600, ensuring that gas leakage and mechanical loosening can be prevented during high-temperature operation. At the same time, through the design of the air pressure control system and the telescopic member 250, the present invention also effectively solves the problem of accidental movement of the clamping member 300 that may occur after the cover plate 200 and the crucible 100 are tightly closed, further improving the operational safety and reliability of the device.

[0073] The graphite crucible 100 fixture of the present invention is suitable for various high-temperature operation scenarios, especially in processes such as metallurgy, chemical industry and laboratory research that require precise control of the atmosphere, and has broad application prospects. Through the precise coordination of multiple structures, the present invention not only improves the service life of the equipment, but also simplifies the operation process, reduces the operation risk, and has significant technical advantages and economic benefits. Through the detailed description and precise design of each component and structure, the graphite crucible 100 fixture of the present invention has demonstrated excellent performance and reliability in practical applications. In the future, with the further development of technology, the present invention is expected to be widely promoted and applied in more industrial fields, providing more reliable guarantees for the safety and efficiency of high-temperature operations.

[0074] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, as long as they do not deviate from the contents of the present specification or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A crucible fixture for vacuum sintering process, wherein: The crucible comprises a containing space and an open end communicating with the containing space, and a second tooth groove is arranged on the peripheral side of the open end, and is characterized in that it comprises: A cover plate, which is arranged on the open end of the crucible to close the open end, and the cover plate is provided with a through hole along its thickness direction, and the through hole is connected to an external protective gas source; A top pipe, fixedly connected to the top of the cover plate; A telescopic member, disposed inside the jacking pipe, the telescopic member comprising a telescopic end that moves in a controlled manner; A sleeve pipe, which is slidably sleeved on the outside of the jacking pipe, and one end of the sleeve pipe is connected to the telescopic end of the telescopic member, so that the sleeve pipe moves with the telescopic end of the telescopic member; A support member, fixedly connected to the top of the cover plate; A clamping member, wherein the clamping member is provided with a first tooth groove that can mesh with the second tooth groove, and the clamping member is also provided with a guide groove; A driving assembly, wherein the clamping member is connected to the supporting member through the driving assembly, and the driving assembly is connected to the sleeve tube, so that the driving assembly moves with the movement of the sleeve tube, thereby driving the clamping member to move; A guide rod is arranged on a side of the cover plate away from the crucible, the axis of the guide rod is parallel to the plane of the side of the cover plate away from the crucible, the guide rod is inserted into the guide groove, and the outer peripheral side of the guide rod is slidably connected to the inner wall of the guide groove to limit the movement path of the clamping member; The first tooth groove includes a first state and a second state, wherein in the first state, the telescopic end of the telescopic member is extended to drive the sleeve tube to move in a direction away from the cover plate, so that the sleeve tube drives the clamping member to move through the driving assembly, and the first tooth groove and the second tooth groove are meshed and connected by the sliding cooperation between the guide rod and the guide groove, so that the cover plate is subjected to a force directed to the open end of the crucible under the cooperation of the first tooth groove and the second tooth groove; in the second state, the telescopic end of the telescopic member is contracted to drive the sleeve tube to move toward the cover plate, so that the sleeve tube drives the clamping member to move through the driving assembly, and the first tooth groove and the second tooth groove are separated by the sliding cooperation between the guide rod and the guide groove, so that the cover plate can be separated from the crucible.

2. The crucible fixture for vacuum sintering process according to claim 1, characterized in that: An air inlet pipe connected to the through hole is provided on the top of the cover plate to introduce protective gas into the accommodating space.

3. The crucible fixture for vacuum sintering process according to claim 2, characterized in that: A control valve and a pressure relief valve are installed on the air intake pipe.

4. The crucible fixture for vacuum sintering process according to claim 1, characterized in that: The notch of the first tooth groove is arranged toward the sleeve tube, and the notch direction of the first tooth groove extends away from the cover plate, and the direction of the second tooth groove is adapted to the first tooth groove, so that the first tooth groove can mesh with the second tooth groove.

5. The crucible fixture for vacuum sintering process according to claim 1, characterized in that: The drive assembly comprises: A connecting plate, one end of which is rotatably connected to the supporting member via a first rotating shaft; A connecting rod, the connecting rod is connected to the other end of the connecting plate in a rotatable manner, and one end of the connecting rod facing away from the connecting plate is hinged to the sleeve tube; Wherein, the connecting plate is rotatably connected to the clamping member via a second rotating shaft, and a connection point between the second rotating shaft and the connecting plate is located between two ends of the connecting plate.

6. A crucible fixture for vacuum sintering process according to any one of claims 1 to 5, characterized in that: A supporting member is provided at the bottom of the clamping member, and a first abutting surface is provided on the side of the supporting member facing the top tube. The position of the supporting member is configured so that when the first tooth groove is engaged with the second tooth groove, the supporting member is located on the side of the guide rod away from the top tube, and the first abutting surface abuts against the peripheral side of the guide rod.

7. The crucible fixture for vacuum sintering process according to claim 6, characterized in that: A first inclined surface is provided on one side of the abutting member facing the cover plate; A slot is provided at the top of the cover plate at a position opposite to the abutting member, and an ejector member movable up and down is provided in the slot, one end of the ejector member is provided in the accommodating space, and a floating plate is provided at the end, and the other end of the ejector member is provided at a side of the cover plate away from the crucible, and a second inclined surface is provided at the end facing the side of the clamping member, so that after the ejector member moves to a preset position, it abuts against the first inclined surface to limit the movement of the clamping member in a direction away from the cover plate.

8. The crucible fixture for vacuum sintering process according to claim 7, characterized in that: The ejector is shaped so as to be able to move up and down only in the slot.

9. The crucible fixture for vacuum sintering process according to claim 7, characterized in that: An elastic member is provided between the floating plate and the cover plate to apply an elastic force to the floating plate away from the cover plate.

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