A nuclear-grade pressure-resistant temperature and pressure switch

Abstract

The present invention relates to the technical field of pressure switches, and particularly to a nuclear-grade pressure-resistant temperature and pressure switch, comprising: a housing, a control element, a detection cylinder and a detection probe; the detection probe is installed in the detection cylinder; the control element is installed in the housing; a buffer cavity is formed in the detection cylinder; a sealing block is slidably connected in the buffer cavity, and a first spring is installed in the buffer cavity; the first spring is fixedly connected to the sealing block; a detection pressure sensor is fixedly connected in the buffer cavity; the contact block is fixedly connected to the first spring; by arranging a buffer cavity in the detection cylinder, the sealing block and the first spring in the buffer cavity share the pressure change in the detection cylinder when the pressure in the pipeline suddenly changes, thereby protecting the detection probe; at the same time, a first spring, a second spring and a third spring are arranged in the buffer cavity, so as to stepwise accommodate more pressure, and therefore the limited buffer stroke in the buffer cavity of the present invention can buffer greater pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure switches, and particularly to a nuclear-grade pressure-resistant temperature and pressure switch. Background Art

[0002] A nuclear-grade pressure-resistant temperature and pressure switch is a precision control device designed specifically for high-requirement fields such as the nuclear industry. It has excellent pressure resistance performance and can operate stably under extreme pressure and temperature conditions to ensure the safety and reliability of nuclear facilities. It uses high-precision sensors that can accurately sense subtle changes in temperature and pressure, with high precision and rapid response in triggering the switch action;

[0003] The nuclear-grade pressure-resistant temperature and pressure switch uses special sealing and protective materials that can effectively resist the effects of nuclear radiation, chemical corrosion, and various harsh environmental factors. Moreover, in order to ensure its long-term stable operation, the design also fully considers the need for easy maintenance and component replacement, reducing the risk of nuclear facility shutdown due to equipment failure;

[0004] In practical applications, the nuclear-grade pressure-resistant temperature and pressure switch is connected to a complex monitoring system to achieve real-time data transmission and remote monitoring;

[0005] The nuclear-grade pressure-resistant temperature and pressure switch is installed on a pipeline to detect the temperature and pressure of the medium flowing in the pipeline. When the temperature or pressure of the medium flowing in the pipeline reaches the set value, the nuclear-grade pressure-resistant temperature and pressure switch controls the connected electrical components;

[0006] When the flow rate of the medium in the pipeline suddenly changes, such as the rapid closing or opening of a valve, or the sudden start or stop of a pump, it will cause the pressure to rise or fall sharply in a short time. When the pressure change is transmitted to the position of the nuclear-grade pressure-resistant temperature and pressure switch, it will cause damage to the nuclear-grade pressure-resistant temperature and pressure switch, thus causing limitations.

[0007] Therefore, we propose a nuclear-grade pressure-resistant temperature and pressure switch. Summary of the Invention

[0008] Aiming at the deficiencies of the prior art, the present invention provides a nuclear-grade pressure-resistant temperature and pressure switch, which overcomes the deficiencies of the prior art and aims to solve the problems in the background art.

[0009] To achieve the above object, the present invention provides the following technical solution: A nuclear-grade pressure-resistant temperature and pressure switch, comprising:

[0010] A housing, a control element, a detection cylinder, and a detection probe; the detection probe is installed inside the detection cylinder; the control element is installed inside the housing; a buffer cavity is provided inside the detection cylinder; a sealing block is slidably connected inside the buffer cavity, and a first spring is installed inside the buffer cavity; the first spring is fixedly connected to the sealing block.

[0011] Preferably, a detection pressure sensor is fixedly connected inside the buffer cavity; a contact block is fixedly connected to the detection pressure sensor; the contact block is fixedly connected to the first spring.

[0012] Preferably, a pair of the first springs are symmetrically arranged inside the buffer cavity; a pair of second springs and a pair of third springs are symmetrically arranged inside the buffer cavity; the second springs and the third springs are both fixedly connected to the contact block; the lengths of the first spring, the second spring, and the third spring decrease in sequence.

[0013] Preferably, a receiving groove is provided inside the buffer cavity; spacer plates are slidably connected evenly inside the receiving groove; connecting ropes are fixedly connected between the spacer plates; the sealing block is fixedly connected to the spacer plates through the connecting ropes.

[0014] By providing a buffer cavity inside the detection cylinder, the sealing block and the first spring inside the buffer cavity share the pressure change inside the detection cylinder when the pressure in the pipeline changes suddenly, thereby protecting the detection probe; at the same time, the first spring, the second spring, and the third spring are provided inside the buffer cavity, so as to accommodate more pressure step by step. Therefore, the limited buffer stroke inside the buffer cavity of the present invention can buffer greater pressure.

[0015] Preferably, the opening of the buffer cavity inside the detection cylinder is at the same height as the detection probe, and the sealing block, the first spring, the second spring, the third spring, and the pressure sensor inside the buffer cavity are all located at the rear end of the detection cylinder.

[0016] By arranging the buffer cavity in the rear half section of the detection cylinder, the volume of the front half section of the detection cylinder is small, which is convenient for installation on the pipeline, and the position of the opening of the buffer cavity is close to that of the detection probe, and it can respond to the pressure impact faster and disperse it.

[0017] Preferably, a first sealing ring and a second sealing ring are installed on the detection cylinder; the end faces of the first sealing ring and the second sealing ring close to each other are arranged in a curved shape and can fit with the inner and outer walls of the pipeline.

[0018] Preferably, an installation groove is provided on the detection cylinder; a pushing block is slidably connected inside the installation groove; a support rod is fixedly connected to the second sealing ring; a connecting rod is hinged between the support rod and the pushing block; the second sealing ring is fixedly connected inside the installation groove.

[0019] Preferably, a pushing ring is threadedly connected to the detection cylinder; the pushing ring is in threaded cooperation with the pushing block; when the pushing ring rotates, it moves towards the second sealing ring and drives the pushing block to move towards the direction close to the pushing ring.

[0020] By providing a first sealing ring and a second sealing ring on the detection cylinder, and pulling the second sealing ring through the pushing block, the second sealing ring is folded, so that the second sealing ring can be inserted into the hole on the pipeline, and the second sealing ring is then unfolded inside the pipeline, thereby sealing the hole on the inner and outer sides of the pipeline hole.

[0021] Advantages of the present invention:

[0022] 1. By providing a buffer cavity in the detection cylinder, the sealing block and the first spring in the buffer cavity share the pressure change in the detection cylinder when the pressure in the pipeline changes suddenly, thereby protecting the detection probe; at the same time, the first spring, the second spring and the third spring are provided in the buffer cavity, so as to accommodate more pressure step by step. Therefore, the limited buffer stroke in the buffer cavity of the present invention can buffer greater pressure.

[0023] 2. By setting the first spring, the second spring and the third spring to different lengths, the sealing block, the first spring, the second spring and the third spring in the buffer cavity of the present invention can accommodate more pressure step by step. Therefore, the limited buffer stroke in the buffer cavity of the present invention can buffer greater pressure; by arranging the buffer cavity in the second half of the detection cylinder, the volume of the first half of the detection cylinder is small, which is convenient for installation on the pipeline, and the position of the buffer cavity opening is close to the detection probe, which can respond to the pressure impact faster and disperse it.

[0024] 3. By providing a first sealing ring and a second sealing ring on the detection cylinder, and pulling the second sealing ring through the pushing block, the second sealing ring is folded, so that the second sealing ring can be inserted into the hole on the pipeline, and the second sealing ring is then unfolded inside the pipeline, thereby sealing the hole on the inner and outer sides of the pipeline hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is a schematic structural diagram of the detection cylinder, the first sealing ring, the second sealing ring and the pushing ring of the present invention from another perspective;

[0027] Figure 3 is Figure 2 an enlarged view of part A in

[0028] Figure 4 is a sectional view of the detection cylinder, the first sealing ring, the second sealing ring, the pushing ring and the pushing block of the present invention;

[0029] Figure 5 For Figure 4 An enlarged view of part B in

[0030] Figure 6 For Figure 5 An enlarged view of part C in

[0031] In the figure: 11, outer shell; 12, detection cylinder; 13, detection probe; 14, buffer cavity; 15, sealing block; 16, first spring; 17, detection pressure sensor; 18, second spring; 19, third spring; 2, contact block; 21, accommodation groove; 22, spacer; 23, connecting rope; 3, first sealing ring; 31, second sealing ring; 4, installation groove; 41, pushing block; 42, support rod; 43, connecting rod; 44, pushing ring. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1: Refer to the attached drawings of the specification Figure 1 , 2 , 3, 4, 5 and 6, a nuclear-grade pressure-resistant temperature and pressure switch, comprising:

[0034] An outer shell 11, a control element, a detection cylinder 12 and a detection probe 13; the detection probe 13 is installed in the detection cylinder 12; the control element is installed in the outer shell 11; a buffer cavity 14 is provided in the detection cylinder 12; a sealing block 15 is slidably connected in the buffer cavity 14, and a first spring 16 is installed in the buffer cavity 14; the first spring 16 is fixedly connected to the sealing block 15.

[0035] In the present invention, a detection pressure sensor 17 is fixedly connected in the buffer cavity 14; a contact block 2 is fixedly connected to the detection pressure sensor 17; the contact block 2 is fixedly connected to the first spring 16.

[0036] In the present invention, a pair of first springs 16 are symmetrically arranged in the buffer cavity 14; a pair of second springs 18 and a pair of third springs 19 are symmetrically arranged in the buffer cavity 14; the second springs 18 and the third springs 19 are both fixedly connected to the contact block 2; the lengths of the first spring 16, the second spring 18 and the third spring 19 decrease in sequence.

[0037] In the present invention, a receiving groove 21 is formed in the buffer chamber 14; a spacer plate 22 is slidably connected in the receiving groove 21 evenly; a connecting rope 23 is fixedly connected between the spacer plates 22; the sealing block 15 is fixedly connected to the spacer plate 22 through the connecting rope 23.

[0038] In the present invention, the detection cylinder 12 is installed on the pipeline. When the medium in the pipeline passes through the position of the detection cylinder 12, the detection probe 13 in the detection cylinder 12 detects the temperature and pressure of the medium in the pipeline.

[0039] When the pressure of the medium in the pipeline rises sharply within a short period of time, the sealing block 15 in the buffer chamber 14 moves towards the direction close to the detection pressure sensor 17, so that the sealing block 15 in the buffer chamber 14 shares the pressure in the detection cylinder 12. Therefore, when the pressure of the medium in the pipeline rises sharply, the instantaneous pressure change received by the detection probe 13 becomes smaller compared to the original, thus playing a role in protecting the detection probe 13. At the same time, during the movement of the sealing block 15 in the buffer chamber 14, the first spring 16 is compressed, and the first spring 16 transfers the pressure to the detection pressure sensor 17. Therefore, the detection pressure sensor 17 detects the pressure change, and thus obtains the pressure shared by the buffer chamber 14. By combining the pressure change of the detection pressure sensor 17 with the pressure of the detection probe 13, the pressure value in the detection cylinder 12 is obtained.

[0040] In the present invention, a second spring 18 and a third spring 19 are arranged in the receiving cavity, and the lengths of the first spring 16, the second spring 18 and the third spring 19 decrease in sequence. Therefore, after the first spring 16 is compressed to a certain extent, the second spring 18 will also be compressed until the third spring 19 is also compressed. Thus, the sealing block 15, the first spring 16, the second spring 18 and the third spring 19 in the buffer chamber 14 of the present invention can stepwise accommodate more pressure. Therefore, the limited buffer stroke in the buffer chamber 14 of the present invention can buffer greater pressure.

[0041] In the present invention, the spacer plates 22 between the first spring 16, the second spring 18 and the third spring 19 can separate the first spring 16, the second spring 18 and the third spring 19, and at the same time prevent the first spring 16, the second spring 18 and the third spring 19 from bending when being compressed, thus affecting the movement of the sealing block 15; the spacer plates 22 are connected through the connecting rope 23, and the spacer plates 22 are slidably connected in the receiving groove 21, thus not affecting the movement of the sealing block 15.

[0042] In the present invention, a buffer chamber 14 is provided inside the detection cylinder 12, such that the sealing block 15 and the first spring 16 inside the buffer chamber 14 share the pressure change inside the detection cylinder 12 when the pressure in the pipeline suddenly changes, thereby protecting the detection probe 13; at the same time, the first spring 16, the second spring 18, and the third spring 19 are provided inside the buffer chamber 14, so as to stepwise accommodate more pressure. Therefore, the limited buffer stroke inside the buffer chamber 14 of the present invention can buffer a greater pressure.

[0043] Embodiment 2: On the basis of Embodiment 1, referring to the attached Figure 1 , 2 , 3, 4, 5, and 6, in the present invention, the opening of the buffer chamber 14 inside the detection cylinder 12 is at the same height as the detection probe 13, and the sealing block 15, the first spring 16, the second spring 18, the third spring 19, and the pressure sensor inside the buffer chamber 14 are all located at the rear end of the detection cylinder 12.

[0044] In the present invention, the buffer chamber 14 is arranged in the second half of the detection cylinder 12, so that the volume of the first half of the detection cylinder 12 is small, which is convenient for installation on the pipeline, and the position of the opening of the buffer chamber 14 is close to that of the detection probe 13, and it can respond to the pressure impact faster and disperse it.

[0045] In the present invention, a first sealing ring 3 and a second sealing ring 31 are installed on the detection cylinder 12; the end faces of the first sealing ring 3 and the second sealing ring 31 close to each other are arranged in a curved shape and can fit with the inner and outer walls of the pipeline.

[0046] In the present invention, an installation groove 4 is provided on the detection cylinder 12; a push block 41 is slidably connected inside the installation groove 4; a support rod 42 is fixedly connected to the second sealing ring 31; a connecting rod 43 is hinged between the support rod 42 and the push block 41; the second sealing ring 31 is fixedly connected inside the installation groove 4.

[0047] In the present invention, a push ring 44 is threadedly connected to the detection cylinder 12; the push ring 44 is in threaded cooperation with the push block 41; when the push ring 44 rotates, it moves towards the second sealing ring 31 and drives the push block 41 to move in the direction close to the push ring 44.

[0048] In the present invention, a first sealing ring 3 and a second sealing ring 31 are provided on the detection cylinder 12. When installing the detection cylinder 12, a hole is drilled in the pipeline, and then the pushing ring 44 is rotated in the reverse direction, so that the pushing block 41 pulls the second sealing ring 31, causing the second sealing ring 31 to bend towards the direction close to the pushing block 41, reducing the diameter of the second sealing ring 31, facilitating the insertion of the front end of the detection cylinder 12 into the hole opened in the pipeline. Subsequently, the pushing ring 44 is rotated in the forward direction, so that the pushing block 41 pushes the second sealing ring 31, causing the second sealing ring 31 to expand. Thus, the second sealing ring 31 is inside the pipeline and the first sealing ring 3 is outside the pipeline. Therefore, the first sealing ring 3 and the second sealing ring 31 are respectively located above and below the hole in the pipeline. Continuing to rotate the pushing ring 44, the first sealing ring 3 and the second sealing ring 31 seal the hole in the pipeline. Therefore, when installing the detection cylinder 12 of the present invention, a hole can be arbitrarily opened in the pipeline and then installed;

[0049] The present invention provides a first sealing ring 3 and a second sealing ring 31 on the detection cylinder 12, and by pulling the second sealing ring 31 with the pushing block 41, the second sealing ring 31 can be folded, so that the second sealing ring 31 can be inserted into the hole in the pipeline, and then the second sealing ring 31 expands inside the pipeline, thereby sealing the hole on the inner and outer sides of the pipeline hole.

[0050] Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed; the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A nuclear grade pressure-resistant temperature and pressure switch, characterized in that: include A housing (11), a control element, a detection cylinder (12) and a detection probe (13); the detection probe (13) is installed in the detection cylinder (12); the control element is installed in the housing (11); a buffer cavity (14) is provided in the detection cylinder (12); a sealing block (15) is slidably connected in the buffer cavity (14), and a No. 1 spring (16) is installed in the buffer cavity (14); the No. 1 spring (16) is fixedly connected to the sealing block (15); A detection pressure sensor (17) is fixedly connected in the buffer cavity (14); a contact block (2) is fixedly connected to the detection pressure sensor (17); and the contact block (2) is fixedly connected to the first spring (16); A pair of the No. 1 springs (16) are symmetrically arranged in the buffer cavity (14); a pair of No. 2 springs (18) and a pair of No. 3 springs (19) are symmetrically arranged in the buffer cavity (14); the No. 2 springs (18) and the No. 3 springs (19) are both fixedly connected to the contact block (2); the lengths of the No. 1 spring (16), the No. 2 spring (18) and the No. 3 spring (19) decrease in sequence; The buffer cavity (14) is provided with a receiving groove (21); a spacer plate (22) is evenly slidably connected in the receiving groove (21); a connecting rope (23) is fixedly connected between the spacer plates (22); and the sealing block (15) is fixedly connected to the spacer plates (22) via the connecting rope (23).

2. A nuclear grade pressure-resistant temperature and pressure switch according to claim 1, characterized in that: The opening of the buffer chamber (14) in the detection tube (12) is at the same height as the detection probe (13); the sealing block (15), the No. 1 spring (16), the No. 2 spring (18), the No. 3 spring (19) and the pressure sensor in the buffer chamber (14) are all located at the rear end of the detection tube (12).

3. A nuclear grade pressure-resistant temperature and pressure switch according to claim 2, characterized in that: A first sealing ring (3) and a second sealing ring (31) are mounted on the detection cylinder (12); the end surfaces of the first sealing ring (3) and the second sealing ring (31) close to each other are arranged in a curved shape so as to fit against the inner and outer walls of the pipeline.

4. A nuclear grade pressure-resistant temperature and pressure switch according to claim 3, characterized in that: The detection cylinder (12) is provided with a mounting groove (4); a push block (41) is slidably connected in the mounting groove (4); a support rod (42) is fixedly connected to the second sealing ring (31); a connecting rod (43) is hingedly connected between the support rod (42) and the push block (41); and the second sealing ring (31) is fixedly connected in the mounting groove (4).

5. A nuclear grade pressure-resistant temperature and pressure switch according to claim 4, characterized in that: A push ring (44) is threadedly connected to the detection cylinder (12); the push ring (44) is threadedly matched with the push block (41); when the push ring (44) rotates, it moves toward the second sealing ring (31) and drives the push block (41) to move in a direction close to the push ring (44).

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