Adjustable depth bimetallic thermometer

Abstract

The present application belongs to the field of bimetal thermometer, and particularly relates to a bimetal thermometer with adjustable temperature measuring depth, which comprises a fixing mechanism, a first auxiliary mechanism, a second auxiliary mechanism and a thermometer. The fixing mechanism, which is used for fixing the bimetal thermometer for collecting the temperature at the bottom of the measuring hole, has a structure for fixing itself in the measuring hole under the cooperation of the first auxiliary mechanism. The cooperation of the fixing mechanism and the thermometer can not only realize the fixed temperature measurement of the thermometer in any orientation of the tunnel, but also realize the fixation of the thermometer with a fixed length in the concrete measuring hole at different depths and the effective temperature measurement and collection of the concrete layers at different depths.

Description

Technical Field

[0001] The invention belongs to the field of bimetallic thermometers, and in particular relates to a bimetallic thermometer with adjustable temperature measuring depth. Background Art

[0002] A bimetallic thermometer combines two metals with different linear expansion coefficients, fixed at one end. When the temperature changes, the two metals expand differently, causing a pointer to deflect and indicate the temperature. Its temperature measurement range is -80°C to 500°C, making it suitable for industrial temperature measurement where high precision is not a requirement. The bimetallic strip can also be used as a temperature sensing element for automatic temperature control.

[0003] When measuring the temperature of concrete at the top of a tunnel, it is not easy to suspend and fix the thermometer in the measuring hole at the top of the tunnel. Even if there is a positioning structure for suspending and fixing the thermometer in the measuring hole at the top of the tunnel, it is necessary to rely on people to use an elevator to climb to the vicinity of the measuring hole to position and fix the thermometer, which is inefficient.

[0004] When measuring the internal temperature of large-volume concrete, a bimetallic thermometer of corresponding length is placed in the temperature measuring hole left in advance during pouring to measure the concrete temperature at the bottom of the temperature measuring hole. However, in the actual concrete temperature stress analysis calculation, it is necessary to collect the concrete temperature at different parts and depths. If a traditional fixed-length bimetallic thermometer is used for temperature measurement, thermometers of different lengths need to be placed for different hole depths, which limits the scope of use of the thermometer.

[0005] The measuring hole for inserting the thermometer is often clogged with soil, which affects the effective insertion depth of the thermometer and reduces the accuracy and efficiency of measuring the concrete temperature at the required depth.

[0006] The present invention designs a bimetallic thermometer with adjustable temperature measurement depth to solve the above problems. Summary of the Invention

[0007] In order to solve the above-mentioned defects in the prior art, the present invention discloses a bimetallic thermometer with adjustable temperature measurement depth, which is realized by adopting the following technical solutions.

[0008] A bimetallic thermometer with adjustable temperature measurement depth comprises a fixing mechanism, a first auxiliary mechanism, a second auxiliary mechanism, and a thermometer. The fixing mechanism, which cooperates with the first auxiliary mechanism to clean the soil at the bottom of a measuring hole and fixes the bimetallic thermometer, which collects the temperature at the bottom of the measuring hole, to the measuring hole, has a structure that fixes itself in the measuring hole in cooperation with the first auxiliary mechanism, and can be released from its fixation in the measuring hole in cooperation with the second auxiliary mechanism.

[0009] As a further improvement of the present technology, the fixing mechanism includes a first cylinder, a square head, a baffle, a swing shaft, a first crank rod, a first connecting rod, a second crank rod, a second connecting rod, a square sleeve, a synchronization rod, a reset spring, a first threaded sleeve, a second threaded sleeve, a second ring sleeve, a third connecting rod, a fourth connecting rod, a stay, and a leaf spring, wherein one end of the first cylinder is equipped with a hollow square head connected thereto, and the other end is axially slidably fitted with a first ring sleeve; the end of the first ring sleeve is equipped with a first threaded sleeve, and the inner wall of the first threaded sleeve is fitted with a convex ring thread on the thermometer; the V-shaped opening at the end of the square head Two baffles for opening and closing the same are hinged at the mouth of the swing shaft through a swing shaft; two V-shaped first crank rods are symmetrically installed at both ends of one swing shaft, and two second crank rods are symmetrically installed at both ends of the other swing shaft; each second crank rod is connected to one branch of the first crank rod on the corresponding side through a hinged first connecting rod; one branch of the first crank rod that is not hinged to the first connecting rod is connected to the square sleeve that slides axially in the square head along the first cylinder through a hinged second connecting rod; the square sleeve is fixedly connected to the first ring sleeve through two symmetrical synchronization rods, and each synchronization rod is embedded with a reset spring for resetting it.

[0010] A second threaded sleeve is nested and screwed on the outside of the first cylinder, and a second ring sleeve is rotatably fitted on the second threaded sleeve and axially slides with the first cylinder; three third connecting rods evenly distributed in the circumference are hinged at one end of the second ring sleeve, and the three third connecting rods are respectively hinged to the three fourth connecting rods hinged at the square head; the hinge between each fourth connecting rod and the corresponding third connecting rod is hinged to two support ears fixedly connected to the support rods parallel to the first cylinder through a communicating hinge pin, and the two ends of the support rod are respectively connected to the corresponding third connecting rod and the fourth connecting rod through a leaf spring.

[0011] As a further improvement of the present technology, the length of the third connecting rod is equal to the length of the fourth connecting rod; and an anti-slip rubber pad is installed on the support bar.

[0012] As a further improvement of the present technology, the end of one of the baffles has a folding strip to prevent soil from entering the square head of the lower measuring hole from the gap between the two baffles when the two baffles are in a closed state; the inner wall of the baffle with the folding strip is installed with an inclined block that cooperates with the end of the thermometer to prevent the thermometer from being reflected by the folding strip when the two baffles are pushed open.

[0013] As a further improvement of the present technology, the first auxiliary mechanism includes a first round rod, a second cylinder, a first sleeve, a third threaded sleeve, and a second shift block, wherein the second cylinder is installed at the end of the first round rod, and the slot at the end of the second cylinder side wall is matched with the synchronization block on the inner wall of the first cylinder; the first sleeve is nested on the first round rod, and the third threaded sleeve at the end of the first sleeve is matched with the external thread of the first threaded sleeve and the external thread on the first cylinder; the second shift block installed on the third threaded sleeve is matched with the first shift block installed on the second threaded sleeve.

[0014] As a further improvement of the present technology, the second auxiliary mechanism includes a second round rod, a third cylinder, a second sleeve, a fourth cylinder, and a third shift block, wherein the third cylinder is installed at the end of the second round rod, and the slot at the end of the third cylinder passes through the side wall and cooperates with the synchronization block on the inner wall of the first cylinder; the second sleeve is nested on the second round rod, and the third shift block installed on the fourth cylinder at the end of the second sleeve cooperates with the first shift block installed on the second threaded sleeve.

[0015] Compared with traditional bimetallic thermometers, the fixing mechanism of the present invention cooperates with the thermometer to not only realize fixed temperature measurement of the thermometer in the temperature measuring hole at any orientation in the tunnel, but also realize fixing thermometers of fixed length in concrete measuring holes of different depths and effectively measuring and collecting the temperature of concrete layers at different depths.

[0016] Before the thermometer is inserted into the measuring hole, the fixing mechanism can effectively clear away soil that has fallen to the bottom of the measuring hole and is blocking the bottom of the measuring hole, so that the temperature measuring end of the thermometer can reach the bottom of the measuring hole to accurately measure and collect the temperature of the concrete layer at a desired depth, thereby improving measurement efficiency. The present invention has a simple structure and good performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the fixing mechanism and its cross-section.

[0018] Figure 2 It is a schematic diagram of two partial sections of the fixing mechanism.

[0019] Figure 3 This is a schematic diagram of the cooperation between the first cylinder and the square head.

[0020] Figure 4 It is a cross-sectional schematic diagram of the first auxiliary mechanism and the second auxiliary mechanism.

[0021] Figure 5 It is a cross-sectional schematic diagram of the cooperation between the first auxiliary mechanism and the fixing mechanism.

[0022] Figure 6 It is a cross-sectional schematic diagram of the cooperation between the second auxiliary mechanism and the fixing mechanism.

[0023] Figure 7 It is a cross-sectional diagram of the thermometer and the fixing mechanism.

[0024] Names of references in the figure: 1. fixing mechanism; 2. first cylinder; 3. first guide groove; 4. guide sleeve; 5. square head; 6. opening; 7. baffle; 8. swing shaft; 9. first crank rod; 10. first connecting rod; 11. second crank rod; 12. second connecting rod; 13. square sleeve; 14. synchronization rod; 15. return spring; 16. fixing ring; 17. first threaded sleeve; 18. second guide block; 19. second guide groove; 20. second threaded sleeve; 21. first shifting block; 22. second ring sleeve; 23. first guide block; 24. third connecting rod Rod; 25, fourth connecting rod; 26, stay; 27, lug; 28, rubber pad; 29, leaf spring; 30, folding bar; 31, synchronization block; 32, first auxiliary mechanism; 33, first round rod; 34, second cylinder; 35, slot; 36, first sleeve; 37, third threaded sleeve; 38, second shift block; 39, second auxiliary mechanism; 40, second round rod; 41, third cylinder; 43, second sleeve; 44, fourth cylinder; 45, third shift block; 46, oblique block; 47, thermometer; 49, annular bulge; 50, first annular sleeve. DETAILED DESCRIPTION

[0025] The accompanying drawings are schematic diagrams of the present invention to facilitate understanding of the structural operation principle. The specific product structure and proportional dimensions can be determined according to the use environment and conventional technology.

[0026] like Figure 1 、 4 As shown, it includes a fixing mechanism 1, a first auxiliary mechanism 32, a second auxiliary mechanism 39, and a thermometer 47. Figure 5 、 7 As shown, the fixing mechanism 1 of the measuring hole is used to clean the soil at the bottom of the measuring hole and fix the bimetallic thermometer 47 for collecting the temperature at the bottom of the measuring hole to the measuring hole. The fixing mechanism 1 has a structure that fixes itself in the measuring hole in cooperation with the first auxiliary mechanism 32. Figure 6 As shown, the fixing mechanism 1 can be released from its fixation in the measuring hole with the cooperation of the second auxiliary mechanism 39 .

[0027] like Figure 1 、 2 As shown, the fixing mechanism 1 includes a first cylinder 2, a square head 5, a baffle 7, a swing shaft 8, a first crank rod 9, a first connecting rod 10, a second crank rod 11, a second connecting rod 12, a square sleeve 13, a synchronization rod 14, a return spring 15, a first threaded sleeve 17, a second threaded sleeve 20, a second ring sleeve 22, a third connecting rod 24, a fourth connecting rod 25, a stay 26, and a leaf spring 29, wherein as shown in FIG. Figure 2 、 3 As shown, a hollow square head 5 is installed at one end of the first cylinder 2 and is connected thereto, and a first ring sleeve 50 is axially slidably fitted in the other end; Figure 1 、 5As shown in FIG6 , a first threaded sleeve 17 is installed at the end of the first ring sleeve 50, and the inner wall of the first threaded sleeve 17 is threadedly matched with the annular protrusion 49 on the thermometer 47; Figure 1 、 2 As shown in Figure 3, two baffles 7 for opening and closing the square head 5 are hinged at the V-shaped opening 6 at the end of the square head 5 through a swing shaft 8; two V-shaped first crank rods 9 are symmetrically installed at both ends of one swing shaft 8, and two second crank rods 11 are symmetrically installed at both ends of the other swing shaft 8; each second crank rod 11 is connected to one branch of the first crank rod 9 on the corresponding side through a hinged first connecting rod 10; one branch of the first crank rod 9 that is not hinged to the first connecting rod 10 is connected to a square sleeve 13 that slides axially along the first cylinder 2 in the square head 5 through a hinged second connecting rod 12; the square sleeve 13 is fixedly connected to the first ring sleeve 50 through two symmetrical synchronization rods 14, and each synchronization rod 14 is embedded with a reset spring 15 for resetting it.

[0028] like Figure 1 、 5 As shown in Figures 6 and 7, a second threaded sleeve 20 is screwed onto the outer surface of the first cylinder 2, and a second ring sleeve 22 is rotatably fitted on the second threaded sleeve 20 and axially slidably fitted with the first cylinder 2; Figure 1 、 2 As shown, three third links 24 evenly distributed in the circumference are hinged at one end of the second ring sleeve 22, and the three third links 24 are hinged to the three fourth links 25 hinged at the square head 5 respectively; the hinge between each fourth link 25 and the corresponding third link 24 is hinged through a connecting hinge pin to two ears 27 fixedly connected to the support bar 26 parallel to the first cylinder 2, and the two ends of the support bar 26 are connected to the corresponding third link 24 and the fourth link 25 respectively through a leaf spring 29.

[0029] like Figure 1 、 2 As shown, the length of the third connecting rod 24 is equal to the length of the fourth connecting rod 25, ensuring that the support bar 26 remains parallel to the first cylinder 2 during the swinging of the third connecting rod 24 and the corresponding fourth connecting rod 25, thereby effectively cooperating with the inner wall of the measuring hole. A non-slip rubber pad 28 is mounted on the support bar 26 to ensure that the fixing mechanism 1 is effectively fixed within the measuring hole.

[0030] like Figure 2 As shown, the end of one of the baffles 7 has a folding strip 30 that prevents soil from entering the lower measuring hole square head 5 through the gap between the two baffles 7 when the two baffles 7 are in the closed state; the inner wall of the baffle 7 with the folding strip 30 is installed with an inclined block 46 that cooperates with the end of the thermometer 47 to prevent the thermometer 47 from reflecting against the folding strip 30 when the two baffles 7 are pushed open.

[0031] like Figure 4 、 5As shown, the first auxiliary mechanism 32 includes a first round rod 33, a second cylinder 34, a first sleeve 36, a third threaded sleeve 37, and a second shift block 38, wherein the second cylinder 34 is installed at the end of the first round rod 33, and the slot 35 at the end of the side wall of the second cylinder 34 passes through the slot 35 and cooperates with the synchronization block 31 on the inner wall of the first cylinder 2; the first round rod 33 is nested with the first sleeve 36, and the third threaded sleeve 37 at the end of the first sleeve 36 cooperates with the external thread of the first threaded sleeve 17 and the external thread on the first cylinder 2; the second shift block 38 installed on the third threaded sleeve 37 cooperates with the first shift block 21 installed on the second threaded sleeve 20.

[0032] like Figure 4 、 6 As shown, the second auxiliary mechanism 39 includes a second round rod 40, a third cylinder 41, a second sleeve 43, a fourth cylinder 44, and a third shift block 45, wherein the third cylinder 41 is installed at the end of the second round rod 40, and the slot 35 at the end of the third cylinder 41 passes through the side wall and cooperates with the synchronization block 31 on the inner wall of the first cylinder 2; the second sleeve 43 is nested on the second round rod 40, and the third shift block 45 installed on the fourth cylinder 44 at the end of the second sleeve 43 cooperates with the first shift block 21 installed on the second threaded sleeve 20.

[0033] like Figure 5 、 6 As shown, two first guide blocks 23 are symmetrically mounted on the inner wall of the second ring sleeve 22 , and the two first guide blocks 23 slide in the two first guide grooves 3 on the outer wall of the first cylinder 2 respectively.

[0034] like Figure 5 、 6 As shown, two second guide blocks 18 are symmetrically mounted on the outer side of the first ring sleeve 50 , and the two second guide blocks 18 slide in two second guide grooves 19 on the inner wall of the cylinder respectively.

[0035] like Figure 2 As shown, the synchronization rod 14 slides in the guide sleeve 4 on the inner wall of the first cylinder 2. The return spring 15 is a compression spring; one end of the return spring 15 is connected to the corresponding guide sleeve 4, and the other end is connected to the fixing ring 16 on the corresponding synchronization rod 14.

[0036] The present invention operates as follows: In the initial state, the two baffles 7 in the fixing mechanism 1 close the opening 6 of the square head 5, the two return springs 15 are compressed, and the small gap between the first threaded sleeve 17 and the end of the first cylinder 2 is at its maximum limit. The third connecting rod 24 and the fourth connecting rod 25 are both in close contact with the outer wall of the first cylinder 2. The struts 26 are parallel to the first cylinder 2, and the two leaf springs 29 corresponding to each strut 26 are equally compressed. The second ring sleeve 22 in the fixing mechanism 1 is at its maximum distance from the square head 5, and the second threaded sleeve 20 is at a small gap from the end of the first cylinder 2.

[0037] When the present invention is required to collect the temperature of a concrete layer at a certain depth, a measuring hole is first drilled in the concrete so that the bottom of the measuring hole reaches the concrete layer whose temperature needs to be collected.

[0038] The first round rod 33 of the first auxiliary mechanism 32 is inserted into the cylinder, and the third threaded sleeve 37 on the first auxiliary mechanism 32 is nested and screwed onto the first threaded sleeve 17 .

[0039] Hold the first sleeve 36 and insert the fixing mechanism 1 into the measuring hole so that the end of the square head 5 is against the bottom of the measuring hole. Then, based on experience, the fixing mechanism 1 is pulled a small distance out of the measuring hole through the first sleeve 36 to ensure that the movement of the two baffles 7 at the end of the square head 5 does not interfere with the bottom of the measuring hole.

[0040] Then, the first rod 33 is moved in the second cylinder 34 so that the synchronization block 31 on the inner wall of the second cylinder 34 is inserted into the groove 35 on the second cylinder 34 at the end of the first rod 33, so that the circumferential motion of the first rod 33 is synchronized with that of the first cylinder 2.

[0041] Next, the first sleeve 36 is rotated relative to the first rod 33 , and the first sleeve 36 drives the third threaded sleeve 37 to rotate relative to the first threaded sleeve 17 and move axially toward the first cylinder 2 . When the third threaded sleeve 37 is nested and screwed onto the first cylinder 2, the third threaded sleeve 37 continues to be rotated. When the second shift block 38 on the third threaded sleeve 37 meets the first shift block 21 on the second threaded sleeve 20 circumferentially, the second threaded sleeve 20 drives the second ring sleeve 22 to move axially toward the bottom of the measuring hole on the first cylinder 2 under the drive of the third threaded sleeve 37. The second ring sleeve 22 drives the two fourth connecting rods 25 to swing through the two third connecting rods 24. Since the lengths of the third connecting rods 24 and the fourth connecting rods 25 are equal, the three support bars 26 move toward the inner wall of the measuring hole under the drive of the corresponding third connecting rods 24 and the fourth connecting rods 25 and finally tightly abut against the inner wall of the measuring hole to complete the effective fixation of the fixing mechanism 1 in the measuring hole. The threaded cooperation between the second threaded sleeve 20 and the first cylinder 2 has a locking function for the fixed state of the fixing mechanism 1 in the measuring hole.

[0042] During the rotation of the third threaded sleeve 37, the synchronization block 31 on the inner wall of the first cylinder 2 is always kept in the groove 35 on the second cylinder 34 at the end of the first round rod 33, and according to experience, the small distance between the end of the square head 5 and the bottom of the measuring hole is always kept unchanged.

[0043] After the fixing mechanism 1 is fixed in the measuring hole, the synchronization block 31 on the inner wall of the first cylinder 2 is kept always in the groove 35 on the second cylinder 34 at the end of the first round rod 33. The first round rod 33 is held by hand and the third threaded sleeve 37 is rotated in the opposite direction through the first sleeve 36. The second shifting block 38 on the third threaded sleeve 37 is circumferentially disengaged from the first shifting block 21 on the second threaded sleeve 20.

[0044] After the third threaded sleeve 37 is released from the first cylinder 2, the rotation of the first sleeve 36 is stopped, so that the third threaded sleeve 37 remains engaged with the first threaded sleeve 17. At this point, the first sleeve 36 is repeatedly pressed toward the bottom of the measuring hole. The first sleeve 36, through the third threaded sleeve 37, the first threaded sleeve 17, the first ring 50, the two synchronization rods 14, the square sleeve 13, the second connecting rod 12, the first crank rod 9, the first connecting rod 10, and the second crank rod 11, drives the two baffles 7 to reciprocately open and close the opening 6 of the square head 5. Each time the two baffles 7 are opened, the soil at the bottom of the measuring hole is moved to the sides and compacted, thereby cleaning the bottom of the measuring hole. During the opening process of the two baffles 7, the two return springs 15 are further compressed.

[0045] When the soil at the bottom of the measuring hole is cleaned, the pressing force on the first sleeve 36 is removed, and the two synchronization rods 14 drive the first ring sleeve 50, the first threaded sleeve 17, the square sleeve 13 and the two baffles 7 to reset under the reset action of the reset spring 15, and the two baffles 7 close the opening 6 of the square head 5 again.

[0046] Then, keep the synchronization block 31 on the inner wall of the first cylinder 2 always in the groove 35 on the second cylinder 34 at the end of the first round rod 33, hold the first round rod 33 and continue to rotate the third threaded sleeve 37 in the opposite direction through the first sleeve 36 until the third threaded sleeve 37 is separated from the first threaded sleeve 17, and the first auxiliary mechanism 32 is axially pulled out of the fixing mechanism 1.

[0047] Next, the thermometer 47 is inserted into the first cylinder 2. When the annular protrusion 49 on the thermometer 47 meets the first threaded sleeve 17, the thermometer 47 is rotated so that the annular protrusion 49 on the thermometer 47 engages with the internal threads of the first threaded sleeve 17. As the annular protrusion 49 on the thermometer 47 continues to engage with the internal threads of the first threaded sleeve 17, the thermometer 47 continues to penetrate deeper into the first cylinder 2. When the end of the thermometer 47 meets the inclined block 46 on the inner wall of one baffle 7, the inclined block 46 pushes the two baffles 7 open and does not interfere with the folding strip 30 at the end of the baffle 7.

[0048] When the two baffles 7 are opened under the action of the thermometer 47, the two baffles 7 will drive the first threaded sleeve 17 on the first ring sleeve 50 and the thermometer 47 to move further toward the bottom of the measuring hole through a series of transmissions, and the two reset springs 15 will be further compressed until the end of the thermometer 47 reaches the bottom position of the measuring hole where the soil has been cleaned and the annular protrusion 49 on the thermometer 47 and the first threaded sleeve 17 on the fixing mechanism 1 are always kept in a screwed state, thereby achieving the purpose of fixing the thermometer 47 in the measuring hole in any orientation. The thermometer 47 can be fixed in the measuring hole at the top of the tunnel without the assistance of lifting equipment, thereby improving the efficiency of installing and fixing the thermometer 47.

[0049] Since the length of the thermometer 47 in the present invention is a fixed length that can adapt to measuring holes of different depths, there is no need to use thermometers 47 of different lengths for measuring holes of different depths, which improves the practicality and applicability of the thermometer 47 and improves the utilization rate of the thermometer 47.

[0050] When the thermometer 47 completes temperature measurement of the concrete layer at the bottom of the measuring hole, the thermometer 47 is rotated in the opposite direction so that the annular protrusion 49 on the thermometer 47 is disengaged from the first threaded sleeve 17 and the thermometer 47 is axially removed. During the process of removing the thermometer 47, the two baffles 7 are closed to the opening 6 of the square head 5 under the reset action of the reset spring 15.

[0051] Then, the second rod 40 of the second auxiliary mechanism 39 is inserted into the first cylinder 2 so that the synchronization block 31 on the inner wall of the first cylinder 2 is located in the groove 35 on the third cylinder 41 at the end of the second rod 40. Then, the fourth cylinder 44 at the end of the second sleeve 43 is inserted into the first cylinder 2 through the first threaded sleeve 17 via the second sleeve 43 in the second auxiliary mechanism 39. The second rod 40 is held stationary by hand while the second sleeve 43 is rotated. The first cylinder 2 and the second rod 40 remain in a synchronized and stationary state. The second sleeve 43 drives the second threaded sleeve 20 to rotate in the opposite direction relative to the first cylinder 2 via the fourth cylinder 44, and the third shifting block 45 on the fourth cylinder 44 drives the second threaded sleeve 20 to rotate in the opposite direction relative to the first cylinder 2. Through a series of transmissions, the second threaded sleeve 20 drives the three stays 26 to disengage from the inner wall of the measuring hole, releasing the fixing mechanism 1 from its fixed state within the measuring hole and finally completing its reset relative to the first cylinder 2.

[0052] Next, axially separate the second auxiliary mechanism 39 from the fixing mechanism 1 and reinsert the first rod 33 of the first auxiliary mechanism 32 into the first cylinder 2, so that the synchronizing block 31 on the inner wall of the first cylinder 2 is located within the retaining groove 35 on the second cylinder 34 at the end of the first rod 33. The second cylinder 34 is rotated through the first sleeve 36 until it engages the first threaded sleeve 17 of the fixing mechanism 1 a certain distance. The fixing mechanism 1 is then pulled out of the measuring hole through the first sleeve 36.

[0053] After the fixing mechanism 1 is pulled out of the measuring hole, the second cylinder 34 is screwed off the first threaded sleeve 17 and the first auxiliary mechanism 32 is separated from the fixing mechanism 1 .

[0054] In summary, the beneficial effects of the present invention are as follows: the fixing mechanism 1 of the present invention cooperates with the thermometer 47 to not only realize fixed temperature measurement of the thermometer 47 in the temperature measuring hole at any orientation in the tunnel, but also to fix the thermometer 47 of fixed length in the concrete measuring holes of different depths and effectively measure and collect the temperature of concrete layers at different depths.

[0055] Before the thermometer 47 is inserted into the measuring hole, the fixing mechanism 1 can effectively clean the soil that has fallen to the bottom of the measuring hole and blocked the bottom of the measuring hole, so that the temperature measuring end of the thermometer 47 can reach the bottom of the measuring hole to accurately measure and collect the temperature of the concrete layer at the required depth, thereby improving the measurement efficiency.

Claims

1. A bimetallic thermometer with adjustable temperature measurement depth, characterized in that: The invention comprises a fixing mechanism (1), a first auxiliary mechanism (32), a second auxiliary mechanism (39), and a thermometer (47), wherein the fixing mechanism (1) cleans the soil at the bottom of the measuring hole by cooperating with the first auxiliary mechanism (32), the fixing mechanism (1) is fixed in the measuring hole in cooperation with the first auxiliary mechanism (32), the fixing mechanism (1) can fix the bimetallic thermometer (47) for collecting the temperature at the bottom of the measuring hole in the measuring hole, and the fixing mechanism (1) can be released from the fixing in the measuring hole in cooperation with the second auxiliary mechanism (39); The fixing mechanism (1) comprises a first cylinder (2), a square head (5), a baffle (7), a swing shaft (8), a first crank rod (9), a first connecting rod (10), a second crank rod (11), a second connecting rod (12), a square sleeve (13), a synchronization rod (14), a return spring (15), a first threaded sleeve (17), a second threaded sleeve (20), a second ring sleeve (22), a third connecting rod (24), a fourth connecting rod (25), a stay (26), and a leaf spring (29), wherein one end of the first cylinder (2) is provided with a hollow square head (5) in communication therewith, and the other end is provided with a first ring sleeve (50) in axial sliding engagement therewith; a first threaded sleeve (17) is provided at the end of the first ring sleeve (50), and the inner wall of the first threaded sleeve (17) is threadedly engaged with the annular protrusion (49) on the thermometer (47); the square head ( 5) Two baffles (7) for opening and closing the same are hingedly connected at the V-shaped opening (6) at the end through a swing shaft (8); two V-shaped first crank rods (9) are symmetrically installed at both ends of one swing shaft (8), and two second crank rods (11) are symmetrically installed at both ends of the other swing shaft (8); each second crank rod (11) is connected to a branch of the first crank rod (9) on the corresponding side through a hinged first connecting rod (10); a branch of the first crank rod (9) not hinged to the first connecting rod (10) is connected to a square sleeve (13) that slides axially along the first cylinder (2) in the square head (5) through a hinged second connecting rod (12); the square sleeve (13) is fixedly connected to the first ring sleeve (50) through two symmetrical synchronization rods (14), and each synchronization rod (14) is embedded with a reset spring (15) for resetting the same; A second threaded sleeve (20) is screwed onto the outside of the first cylinder (2), and a second ring sleeve (22) is rotatably fitted on the second threaded sleeve (20) and axially slidably fitted with the first cylinder (2); one end of the second ring sleeve (22) is hinged with three circumferentially evenly distributed third connecting rods (24), and the three third connecting rods (24) are respectively hinged with three fourth connecting rods (25) hinged at the square head (5) in a one-to-one correspondence; the hinged joint of each fourth connecting rod (25) and the corresponding third connecting rod (24) is hinged with two supporting ears (27) fixedly connected to the support bars (26) parallel to the first cylinder (2) through a communicating hinge pin, and the two ends of the support bars (26) are respectively connected to the corresponding third connecting rod (24) and the fourth connecting rod (25) through a leaf spring (29); The first auxiliary mechanism (32) comprises a first round rod (33), a second cylinder (34), a first sleeve (36), a third threaded sleeve (37), and a second shifting block (38), wherein the second cylinder (34) is installed at the end of the first round rod (33), and a slot (35) passing through the end of the second cylinder (34) on the side wall cooperates with the synchronous block (31) on the inner wall of the first cylinder (2); the first sleeve (36) is nested on the first round rod (33), and the third threaded sleeve (37) at the end of the first sleeve (36) cooperates with the external thread of the first threaded sleeve (17) and the external thread on the first cylinder (2); the second shifting block (38) installed on the third threaded sleeve (37) cooperates with the first shifting block (21) installed on the second threaded sleeve (20); The second auxiliary mechanism (39) comprises a second round rod (40), a third cylinder (41), a second sleeve (43), a fourth cylinder (44), and a third shifting block (45), wherein the third cylinder (41) is installed at the end of the second round rod (40), and a slot (35) passing through the side wall of the third cylinder (41) at the end thereof cooperates with a synchronous block (31) on the inner wall of the first cylinder (2); a second sleeve (43) is nested on the second round rod (40), and the third shifting block (45) installed on the fourth cylinder (44) at the end of the second sleeve (43) cooperates with the first shifting block (21) installed on the second threaded sleeve (20).

2. The bimetallic thermometer with adjustable temperature measurement depth according to claim 1, characterized in that: The length of the third connecting rod (24) is equal to that of the fourth connecting rod (25); and an anti-slip rubber pad (28) is installed on the support bar (26).

3. The bimetallic thermometer with adjustable temperature measurement depth according to claim 1, characterized in that: The end of one of the baffles (7) is provided with a folding strip (30) for preventing soil from entering the lower insert measuring hole square head (5) from the gap between the two baffles (7) when the two baffles (7) are in a closed state; the inner wall of the baffle (7) with the folding strip (30) is provided with an inclined block (46) which cooperates with the end of the thermometer (47) to prevent the thermometer (47) from reflecting against the folding strip (30) when the two baffles (7) are pushed open.

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