Buckle type locking device for manhole cover of fermentation tank

Abstract

The utility model is suitable for fermentation equipment technical field, proposes a kind of buckle type locking device for fermentation tank manhole cover, including locking lever, the bottom rotation connection positioning member of locking lever, the middle part of locking lever is connected with clamping piece, clamping piece is connected with manhole cover, the upper portion of locking lever is connected with locking nut by thread;The protruding ring is equipped on the manhole cover, the inside edge of protruding ring is vertical first right angle side, the outside edge of manhole cover is vertical second right angle side;The clamping piece is equipped with the clamping groove of cooperation with protruding ring, the side of clamping groove is inclined side, the other side is third right angle side.Summing up, the vertical state of buckle type locking device itself of the utility model is consistent with pressure direction, locking lever in locking device is not prone to bending;Meanwhile, the possibility of manhole cover and locking device slipping is reduced, locking effect is improved, locking device can withstand greater tank pressure.

Description

Technical Field

[0001] This utility model relates to the field of fermentation equipment technology, and in particular to a snap-locking device for the manhole cover of a fermentation tank. Background Technology

[0002] A fermenter is an industrial device used for microbial fermentation. Its main body is generally cylindrical, with a volume ranging from 1 m³ to several hundred m³. Larger fermenters typically have manholes at the top to allow workers to enter the fermenter for regular inspection, maintenance, and cleaning, ensuring the normal operation of the equipment and the stability of the fermentation process. The manholes of fermenters are usually equipped with multiple safety features, such as pressure-locking devices.

[0003] Microorganisms (such as yeast and bacteria) produce gases like carbon dioxide during fermentation, causing the pressure inside the fermenter to rise. Maintaining positive pressure in the fermenter increases the solubility of oxygen in the culture medium, promoting cell growth and product synthesis. Generally, the pressure inside the fermenter is controlled between 0.03 and 0.1 MPa, but smaller fermenters may require higher pressures to prevent contamination. Therefore, the manhole cover of the fermenter must be able to withstand the internal pressure to ensure safety.

[0004] See Figure 5 In the existing technology, many manufacturers use a snap-on bolt locking structure. The edge of the manhole cover in this structure is set at an angle, and the locking bolt 6 and the cap 5 are also designed at an angle. The pressure inside the fermentation tank acts vertically upward inside the manhole cover. After long-term use, the locking bolt is prone to bending, the locking effect decreases, and the snap-on joint between the cap and the edge of the manhole cover is prone to disengagement or slippage, which poses a safety hazard. Utility Model Content

[0005] In view of this, this utility model proposes a snap-locking device specifically for the manhole cover of fermentation tanks to solve the problem that the locking bolts of the snap-locking devices in the prior art are prone to bending and the locking effect is reduced.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a snap-locking device for a manhole cover of a fermenter, including a locking rod, a rotatable positioning component at the bottom of the locking rod, a snap-fit ​​component sleeved in the middle of the locking rod, the snap-fit ​​component snapping into the manhole cover, and a locking nut threaded onto the upper part of the locking rod; the manhole cover is provided with a raised ring, the inner side of the raised ring being a vertical first right-angled side, and the outer side of the manhole cover being a vertical second right-angled side; the snap-fit ​​component is provided with a groove that cooperates with the raised ring, one side of the groove being an inclined side, and the other side being a third right-angled side.

[0007] Based on the above technical solutions, preferably, the height of the raised ring is at least 2cm.

[0008] Based on the above technical solutions, preferably, a first anti-slip layer is provided on the first right-angled side; and a second anti-slip layer is provided on the third right-angled side.

[0009] Based on the above technical solutions, preferably, the lower width of the hypotenuse is 0.5-1.5cm less than the upper width.

[0010] Based on the above technical solutions, preferably, the thread height of the locking nut is 2-5cm.

[0011] Based on the above technical solutions, preferably, the portion of the locking rod located between the snap-fit ​​component and the positioning component is fitted with a spring.

[0012] The snap-locking device for the manhole cover of the fermenter of this utility model has the following advantages over the prior art: 1. The vertical position of the snap-locking device is consistent with the direction of pressure, and the locking rod in the locking device is not easy to bend.

[0013] 2. By increasing the snap-fit ​​length, the snap-fit ​​friction, and the height of the threaded section of the locking nut, the possibility of slippage of the manhole cover and snap-fit ​​locking device can be reduced, the locking effect can be improved, and the locking device can withstand greater tank pressure. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 Here is a structural diagram of the manhole cover for the fermenter; Figure 2 Structural diagram of a snap-lock device for the manhole cover of a fermenter; Figure 3 This is a disassembled structural diagram of the snap-fit ​​component and the raised ring; Figure 4 for Figure 2 Structure diagram in direction A; Figure 5 Here is a structural diagram of a snap-locking device in the prior art; In the diagram: 1. Tank body; 2. Manhole seat; 3. Manhole cover; 31. Raised ring; 311. First anti-slip layer; 312. First right-angled side; 32. Second right-angled side; 4. Locking mechanism; 41. Locking rod; 411. Threaded section; 42. Locking nut; 43. Snap-fit ​​part; 431. Snap-fit ​​groove; 432. Third right-angled side; 433. Second anti-slip layer; 434. Inclined side; 44. Rotating shaft; 45. Positioning part; 46. Spring; 5. Snap-fit ​​cap; 6. Locking bolt. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0017] See Figure 1 The fermentation tank manhole cover structure includes a tank body 1, a manhole seat 2 on the top of the tank body 1, and a manhole cover 3 fitted onto the manhole seat 2. Several sets of locking mechanisms 4 are provided on the edges of the manhole cover 3 and the manhole seat 2. The locking mechanisms 4 lock the manhole seat 2 and the manhole cover 3 together, so that the manhole cover 3 can withstand the pressure inside the tank body 1.

[0018] The manhole cover of the fermentation tank in this utility model is a snap-lock device, which includes several sets of locking mechanisms 4 and a raised ring 31 set on the edge of the manhole cover 3.

[0019] See Figure 2 and Figure 3 The inner side of the raised ring 31 is a vertical first right-angled side 312, and the outer side of the manhole cover 3 is a vertical second right-angled side 32.

[0020] See Figure 2 and Figure 4 Each locking mechanism 4 includes a locking rod 41, with a positioning component 45 rotatably connected to the bottom of the locking rod 41. The rotatable connection is as follows: the bottom of the locking rod 41 is integrally formed and connected to a rotating shaft 44, and both ends of the rotating shaft 44 are rotatably connected to the positioning component 45. The positioning component 45 is fixedly connected to the manhole seat 2. When the manhole cover 3 and the manhole seat 2 do not need to be locked, the locking rod 41 can move freely along... Figure 2 Rotating in the d direction does not hinder the opening of the manhole cover 3.

[0021] See Figure 2 and Figure 3The locking rod 41 is fitted with a locking member 43 in the middle. The locking member 43 has a groove 431 that works with the protruding ring 31. The locking member 43 engages with the manhole cover 3 through the engagement of the protruding ring 31 and the groove 431. One side of the groove 431 is a bevel 434, which engages with the second right-angled side 32 of the manhole cover 3. The bevel 434 makes the lower width b of the groove 431 0.5-1.5cm smaller than the upper width a. For example, the lower width b is 5cm and the upper width a is 5.5cm or 6cm. The other side of the groove 431 is a third right-angled side 432, which engages with the first right-angled side 312 of the protruding ring 31. Because one side of the slot 431 is a sloping side 434 that is wider at the top and narrower at the bottom, the lower opening of the slot 431 is large and the inner top opening is small. When the snap-fit ​​piece 43 snaps onto the protruding ring 31 from top to bottom, the protruding ring 31 can easily enter the slot 431 initially, and can achieve a tight snap-fit ​​after it is fully entered into the slot 431. The setting of the first right-angled side 312 of the protruding ring 31 and the third right-angled side 432 of the slot 431 can ensure that the snap-fit ​​piece 43 is always in a vertical state during the snap-fit ​​process between the snap-fit ​​piece 43 and the manhole cover 3, and the locking rod 41 is also in a vertical state. When the snap-fit ​​piece 43 and the locking rod 41 are subjected to vertical upward pressure, the locking rod 41 is not easy to bend.

[0022] The upper part of the locking rod 41 is provided with a threaded section 411, and the external thread of the threaded section 411 is fitted with a locking nut 42; the locking nut 42 is rotated downward, and through the action of the locking nut 42, pressure is applied downward to the snap-fit ​​part 43, so that the snap-fit ​​part 43's slot 431 can smoothly snap into the protruding ring 31.

[0023] See Figure 4 Preferably, the thread height c of the locking nut 42 is 3-5cm. The stability of the engagement between the slot 431 and the raised ring 31, i.e., the locking stability between the locking member 43 and the manhole cover 3, is actually achieved through the locking force of the locking nut 42. In the prior art, the thread height of the locking nut 42 is generally 1-3cm. This invention improves the stability of the threaded engagement between the locking nut 42 and the locking rod 41 by increasing the thread height, reducing the possibility of slippage between the manhole cover 3 and the locking device, and enabling the locking device to withstand greater tank pressure.

[0024] Preferably, a first anti-slip layer 311 is provided on the first right-angled side 312; and a second anti-slip layer 433 is provided on the third right-angled side 432. By providing two anti-slip layers, the friction between the raised ring 31 and the slot 431 can be increased, preventing the slot 431 from slipping off the raised ring 31 when the pressure inside the tank acts upward on the manhole cover 3.

[0025] Preferably, the height of the raised ring 31 is at least 2 cm. By increasing the height of the raised ring 31, the mating length between the raised ring 31 and the slot 431 is increased, making it less likely for the raised ring 31 to slip out of the slot 431 and improving the pressure-bearing capacity of the locking device.

[0026] Preferably, the portion of the locking rod 41 located between the snap-fit ​​member 43 and the positioning member 45 is fitted with a spring 46. When the locking nut 42 is rotated downwards and in the locked state, the spring 46 is in a compressed state. When the locked state is released, the locking nut 42 rotates upwards, and under the restoring action of the spring 46, the snap-fit ​​member 43 is pushed upwards, allowing the snap-fit ​​groove 431 to slide smoothly off the protruding ring 31.

[0027] The working principle of the snap-lock device of this utility model is as follows: If the inner and outer sides of the protruding ring 31 on the edge of the manhole cover 3 are both set as vertical right angles, then the locking part 43 that is engaged with it is also in a vertical state. The locking rod 41 sleeved in the locking part 43 is also in a vertical state in the locked state. Therefore, during the locking process, when the manhole cover 3 is subjected to vertical upward pressure, the vertical state of the locking device itself is consistent with the direction of pressure, and the locking rod 41 in the locking device is not easy to bend.

[0028] The increased height of the raised ring 31 increases the length of the engagement between the locking member 43 and the raised ring 31; an anti-slip layer is provided on the contact surface between the raised ring 31 and the slot 431 to increase the friction when the raised ring 31 and the slot 431 are engaged; the increased height of the threaded section of the locking nut 42 improves the stability of the threaded engagement between the locking nut 42 and the locking rod 41; by increasing the engagement length, increasing the engagement friction, and increasing the threaded section height of the locking nut 42, the possibility of slippage of the manhole cover 3 and the locking device can be reduced, the locking effect can be improved, and the locking device can withstand greater tank pressure.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

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